Chế tạo và khảo sát vật liệu bán dẫn p zno

Dai hoc Quoc gia Ha noi
Tniofng Dai hoc Khoa hoc Tit nhien

_
TfeND^TAI:
CHf TAO VA K H A O SAT VAT LifiU BAN D A N P-ZnO
MA

Sd: QT- 08-11

CHU TRI Di TAI: TS. NGO THU HUONG
(KHOA V^T L^)

Ha noi - 2008


Dai hoc Quoc gia Ha noi
Trtfcmg Dai hoc Khoa hoc Tii nhien

>v'

V

TEN DE TAI:
V
CHE TAO VA KHAO SAT VAT LIEU BAN DAN P-ZnO
MA

SO: QT- 08-11

CHU TRI f)t TAI: TS. NGO THU HUONG

(KHOA VAT LY)

^'^\;;ic-

T,-,t

DT/ qo4
Ha noi - 2008


Dai hoc Quoc gia Ha noi
Triiomg Dai hoc Khoa hoc Tii nhien

TEN DE T A I :
CHE TAO VA K H A O S A T V A T L I E U B A N D A N P-ZnO

MA

SO: QT- 08 -11

CHU TRI DE TAI: TS. NGO THU HUONG
CAC CAN B O T H A M GIA:

TSKH. NGUYfiN HOA HONG
NCS. NGUYilN VIET TUYEN
SINH VIEN: CHU THI THU

Ha noi - 2008

1. Bao cao torn tat
a. Ten de tai : Che tao va khao sal vat lieu ban dSn p-ZnO
(Mas6:QT-08-ll).
b. Chu tri de tai: TS. Ngo Thu Hacmg
c. Cac can bo tham gia: TSKH. Nguyin Hoa Hong
NCS. Nguyin Viet Tuyen
Sinh vien: Chu Thi Thu
d. Thoi gian thuc hien tuf thang 01 nam 2008 den thang 12 nam 2008.
e. Muc tieu va noi dung nghien ciru: Che tao vat lieu ban din loai p-ZnO
va nghien cuii cac tinh chat cau triic, tinh chat nhiet, dien va quang cua loai
vat lieu nay.
f. Cac ket qua dat dupe: Ket qua cua di tai bao gom 01 bai bao giri
dang tap chi cua Dai hoc quoc gia Ha noi; 01 bai hsioa'^gxxi dang lap chi
nirorc ngoai; tham gia hucfng dSn 01 sinh vien nghien curu khoa hoc, se bao
ve nam 2009; tham gia hudng din 01 nghien cun sinh.
g. Tinh hinh kinh phi cua d6 tai:
Tong kinh phi ihuc chi: 20.000.000 dong
Trong do

- Tir ngan sach nha nu6c: 20.000.000 d6ng
- Vay tin dung: 0
- Von tuco: 0

Khoa quan ly
(Ky va ghi ro ho ten)

Chu tri de tai
(Ky va ghi ro ho ten)

IM^ ly

de tai
9H6 WEU TRU

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2. Brief project report
a. Project title: Preparing and studying semiconductor p-type ZnO
materials. (QT-08 - 11)
b. Project co-ordinator: Dr. Ngo Thu Huong
c. Co-operalor: Dr. Nguyen Hoa Hong
Ph.D student Nguyen Viet Tuyen
Student Chu Thi Thu
d. Duration: from 2008, January to 2008, December)
e. Objectives and scientific contents: The main object of this project is: preparing
the p-type ZnO material and studying the structural, electrical and optical
properties of this material.
f. Results: The main results of this work were given in the scientific paper in

the VNU Jounal of Science, Mathematics - Physics, 12/2008.; 01 paper to be
submit in international journal. Supervisor one research student and one Ph.D
student.
g. Budget: 20.000.000 VND


1. Mucluc
Trang
T6ng quan v^ vai lieu

6

C4c phuong phip thuc nghifim

10

Cac k6i qua va bien luan

11

K^tluto

16

Tki lieu tham khao

16


Phin 1: T^ng quan ve vat lieu

Viec |Aa tap c4c tap acceptor d^ thu duoc vat heu ban din p - ZnO \k mdt
vSn d6 duoc dat ra cin phai giai quy€t trong viec img dung cdc hnh kien b^n din
nky. D^ thu dupe bdn dSn loai p, thu5ng cac nguyen 16' nh6m V nhu N, P, As dupe
d&ng nhi^u [1-5]. Tuy nhien, nhom nguyen 16' Cu, Ag trong viec thay v^o vi iri Zn
cung thu dupe bdn d ^ loai p. Cu dupe diing nhu c^c acceptor 6i thay v^o vi tri ciia
Zn v) bin kinh cua ion Qi^ la 0,098 nm va Cu^^ la 0,080 nm la gin nhu tuong
duong vdi bdn kinh ciia ion Zn^^ (0,083 nm). Viec c^c nguyen l6 Ihupc nh6m V
Ihay the' Zn anh hucmg ro ret len cdc tinh ch^t dien v^ quang cua vat lieu bin din.
Vi the' trong d6 tii niy chung t6i nghien cihi su anh hudng cua phospho len cac
tinh cha^t ciu true cua vat lieu bdn din loai p-ZnO.
1.1.

Tinh chit can true cua vat lieu ZnO

Til ca cic vai lieu thu6c nh6m II-VI d^u c6 du true cubic hoac du true luc
giic Wurtzite. Vat lieu ZnO Ihucmg t6n lai m6t trong ba dang nhu dupe chi ra iren
hinh I.
Rocksah(Bl)

Zinc blende (B3)

Wurtzite (B4)

Hinh 1; Qfu true ciia ZnO: (a) dang cubic rocksalt, (b) dang Zinc blende
v^ (c) dang Wutzite

12. Ciu true vdng ndng liromg cua vat lieu ZnO:


Hinh 2 chi ra ph6 phit xa cua nang lupng photon trong dai lijr 20 de'n 50 eV

vi cic th6ng sd ciia khd'i ciu true vung nang lupng ciia vai heu ZnO. Trong cac
ph^p do niy, cic b6 nang lupng lien quan tdi mirc nang lupng Fermi va cu5ng dp
thdng qua th6ng lupng cua photon.
E,=0

(a)

12 6 4 0 12 6 4
Binding energy (eV)
Hmh 2: (a) ph6 phat xa cua nSng lupng photon dai lir 20-50 eV. (b)
C^u true vilng cua ZnO

Hinh 3 la c^u true vung nang lupng theo tinh loan ly thuye't va t6ng cac mat
dp Irang Ih^ (DOS) vdfi cdc pha khac nhau ciia ZnO. Khi c^u true wurtzite hi xam
pham, c6 th^ nhan tha'y rang edc peak a dinh ciia viinghoa tri iren giam kh6ng dang
k^ v£ 66 cao.


20

15
10

10

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?

0

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M2II0

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1r

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(b)

A

Hinh 3: Qfu true vung cua ZnO (a) d\i true B4 6 p = 0; (b) e^u true B, a p = pr, va (c) c§^u
true B2 cf p = Pr2

1.2.

Tinh chat dien cua vat lieu ZnO:

vat lieu ZnO la vat lieu ban din vung cam rpng va th^ng do do chung
la vat lieu c6 nhien kha nang trong umg dung quang hoc va dien hoc. Khi
nghien curu tinh ch^t dien ciia vat lieu ZnO, nhien nhom nghien cum da nghien
cihi sur hinh thanh ban dan loai p khi pha tap va tim cac bien phap de khac
phuc sachuyen ttr ban dan loai p sang ban dan loai n.
Hinh 1.4 la su phu thupc nhiet dp ciia hang so Hall va nong dp cac phan
tiir tai cua ban dan ZnO (theo tinh toan ly thuye't va thuc nghiem). Trong hinh
1.4, b trong khoang nhiet dp 15 K < T < 40 K thi tinh chat van chuyen ciia no
bao gom to hpp cac vung va dp dan qua lai. Khi nhiet dp dat 50 K, hdng so
Hall dat cue dai 2000 cmVVs sau do giam nhanh khi nhiet dp tdng.


2000

A

1

1

1

1

T' " - '

Bulk ZnO

/o ^p

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\o 1000

V

Theory

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500 o
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0

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100

200
T(K)

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I

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300

40C

Hinh 4: Su phu thupe nhiet dp ciia hang s6 Hall ciia mSu ZnO khoi (hinh tron la di^m
thuc nghiem, dudng liln n^t la du6ng \f thuye't).
Hinh 1.5 la su phu thupc ciia nong dp cac phan tii tai vao 1000/T ciia
ban dan ZnO (theo tinh toSn ly thuye't va thuc nghiem). N6ng dd phin tur tii
giam tuye'n tinh tilr 10'^ (cm ^) xuong lO^'* (cm^) va kha khdrp nhau giOa duilmg
tinh toan va duorng thuc nghiem.
I

I I

I I

I

I

I

I I

I

I

I

I

I

I

Bulk ZnO
Theory

10" r

10
15
lO^rr (K')
Hinh 5: Su phu thu^ ciia n6iig dd cic phin tur tai v^o lOOO/T ciia bin din ZnO (theo
tinh toan 1^ thuye't va thuc nghiem).

Phin 11: Thuc nghiem
He vat lieu Zn,.,P,0 (x = 0,03; 0,06; 0,09 va 0,12) dupe che tao bang hai
phuofng phap: phucfng phap gom va phuong phap hoc bay nhiet trong khi mang N2.
D6'i v6i he vat lieu kh6'i, h6n hpp cua bpt ZnO (99 %) va P2O5 (99,9%) dupe
can theo ty le hpp phan va dupe nghien Iron theo qui trinh truyen thong. Mot phan
nho cua h6n hpp bpt dupe dung di do cac tinh chat nhiet TA, DTG de nghien cihi
qua trinh hinh thanh pha ciia vat lieu, tir do chpn nhiet dp thieu ket thich hop. PhSn
con lai dupe ep thanh cac mlu hinh h6p bang may ep ihuy luc duoi ap sua't 5
ta'n/cm^. Cac miu sau khi ep dupe sa'y a nhiet dp 80 '*C trong thdi gian 10 gi5 de
iranh bi nut va khi nung. Sau do, miu dupe dua vao 16 nung tai cac nhiet dp 750
"C, 900 "C, 1100 "C trong 10 gi6 sau do dupe lam lanh cham den nhiet dp phong.
D6i vod he mlu mang, h6n hpp bpt ciia ZnO (99%), P2O5 (99,9%) va 1%
khoi lupng cua bpt graphit (Cac bon) dupe can theo ty le hpp phfin, trpn cho deu
r6i dupe dat trong thuyen thach anh dua vao phSn giua cua 16 ma tai do nhiet dp,
ap sua't khi N2 va thai gian da dupe dieu khi^n. L6 dupe dot tdi 1100 "C giu trong
60 phut. Mang tao thanh tren de Si (111) dupe dat trong viing nhiet dp tir 600 den
700 "C. Trong suot qua trinh hoc bay nhiet, khi N2 dupe thoi vao d^ lam tranh qua
trinh oxy hoa mang.
Ca hai loai mlu mang va mSu khoi sau khi dupe tao ra deu dupe nghien cihi
cac tinh chat ca'u true va tinh chat dien va quang tren cac thiet bi tai Trung tam
khoa hoc Vat lieu thupc khoa Vat ly, tru6ng dai hoc Khoa hoc Tu nhien: pho nhieu
xa tia X ciia cac mSu dupe do tren may do nhieu xa tia X Siemens D5005, anh kinh
hi^n vi be mat (SEM) dupe do tren may JEOL-JSM5410LV, ph6 huynh quang cua
cac mau dupe do tren may Fluorolog FL3-22 Jobin Yvon Spex USA. Phep do hang
so Hall duoc do tren thiet bi do Hall loai 7604.

- r i C C Q U O C GIA HA NOI
VUNG TAN^ THONG TIN THIJ VIEN

^rl_3o^


Phan 3: Cac ket qua va bien luan
Ph6 nhieu xa X-ray ciia cac mSu khoi Zn,.^PxO dupe nung a 750 "C dupe dua
ra tren hinh 1. Tinh chaft ca'u triic va cac thong so mang ciia vat lieu dupe xac dinh
bang chuong trinh Ritveld [6]. Hang s6' mang a va c dupe xac dinh c6 cac gia tri
sau: a = b = 3.756 A, c = 5.028 A. Nhin vao hinh ve la tha'y, khi thanh phan phospo
nho (x = 0.00 de'n 0.06), thi hSu het ta't ca cac dinh phd deu la cac phd thupc pha
ZnO vi the' khi do cac miu la don pha. Khi thanh phin x tang, pha Zn3(P04)2 xuat
hien nhung v6i ty le ve cucmg dp so vori dinh chinh ciia ZnO la kha nho nen mau
vin kha don pha. Tit ca cac dinh (002) ciia he mSu Znj.^PxO (a vi tri goc 20 = 37")
deu dich ve phi goc nho so v6i dinh (002) ciia miu khong pha tap.
r

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X = 0.06
x= 0.03
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k
1

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60

20
Hinh 1: Pho nhiSu xa tia X ciia he miu khoi Zn, ,P,0
Anh SEM ciia he miu khoi Zni.xP^O dupe nung 6 750 "C dupe chi ra tren
hinh 2. Ta't ca cac miu deu c6 ca'u true hat v6i kich thudc ca hang tram nano met
v6i mat d6 xep chat kha cao dieu do cho tha'y a nhiet dp nung nay thanh phan pha
ZnO da hinh thanh. Khi tang nhiet dp thieu ket cua he miu len 900 "C, 1100 "C thi
mat dp hat cung tang len. Hing so Hall ciia hai mSu khoi vai thanh phan x = 0.03
va 0.06 cho ke't qua duong. Dieu do cho thiy miu la ban din loai p a nhiet dp 300
K v6i nong dp 16 trong 10'** cm \


b) X = 0.06

c)x = 0.09
d)x = 0.12
Hinh 2. anh SEM cua mSu khoi Zn,.,P,0 nung a 750 "C.
Ph6 EDS cua ta't ca cac miu khoi deu dupe do. Hinh 3 dua ra pho EDS cua

thanh phin mlu x = 0.06. Nhin vao ket qua ta thay tren pho chi xuat hien cac dinh
ciia cac nguyen to thanh phan Zn, P va O chii khong he c6 thanh phan tap chat
khac. Dieu do cho tha'y P da dupe vao trong phan mang.

100

50—

Energy (WeV)

Hinh 3: Ph6 EDS ciia miu khoi Zno^jPoti^O


Trudc khi thuc hien b6'c bay cac mang Znj.^PxO, cac tinh chat nhiet TA, DTG
ciia cic miu dupe nghien curu mot each ty mi. Hinh 4, 5, 6 va 7 la do thi TA, DTG
ciia lin lupl cac miu v6i cac thanh phin x = 0,03; 0,06; 0,09 va 0,12.
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Hinh 4: Gian do phan tich TA, DTG ciia mlu Zn,,97P()„30

Hinh 5: Gian do phan tich TA, DTG ciia mlu Zn^^^^^V^^^^O


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Hinh 6: Gian do phan tich TA, DTG cua mlu ZnoyiPoo^O.

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Hinh 7: Gian do phan tich TA, DTG cua mlu Zno^xPf, 12O.

Tur cac gian do phan tich nhiet tren ta tha'y hau het vai cac mlu a nhiet dp
gin 1000 "C thi pha ZnO dupe tao thanh con a vung nhiet dp thap su giam khoi
lupng la do sir bay hai cua nguyen to Phospho. Vi the khi boc bay de tao mang
chiing I6i da dat nguon nhiet la 1100 "C de a nhiet dp do dam bao la vat lieu dupe
bay hai m6l each hoan toan.


Khi nghien curu anh SEM cua cac miu mang chiing ta thay cau iriic cua cac
miu mang hoan toan khac so v6i cac miu khoi vi tinh chat cau true ciia cac mlu
phu thupc rat nhieu vao dieu kien cong nghe. Khi nhiet dp trong 16 duoi 1100 "C,
anh SEM cua cac miu la ca'u triic hat. Hinh 8 dua ra anh SEM ciia cac mlu mang
Zni.^P.O (x = 0.03 va 0.06) dupe boc bay khi nhiet dp nguon nhiet la 1100 "C,
th5i gian giu nhiet la 30 phiit, nhiet dp de la 600 "C vk 700 "C

a) X = 0.03, T,ub. = 600 "C

b) X = 0.03, T,,b. = 700 *'C

e) X = 0.06, T,,b. = 600 '^C

d) x = 0.06, T.^. = 700 "C
Hinh 8: anh SEM cua cac mlu mang Zn,.,P,0 (x = 0.03 va 0.06) khi T = 1100 "C.
Tir ket qua tren hinh 8 ta thay, ca'u true nano da dupe tao ra vai kich thudc tir
10 nm de'n 20 nm vai ca hai mlu khi nhiet dp de la T.^b = 600 "C. Khi nhiet dp de
tang, kich thu6c ciia cac day nano cung tang len (hinh 8d). Ket qua nay khing dinh
ring ca'u true tinh the ciia he vai lieu nay phu thupc rat nhieu vao dieu kien cong
nghe
Ph6 huynh quang cua cac miu mang Zn^,J^fi dupe do duai bude song kich thich
325 nm dupe dua ra tren hinh 9. Tat ca cac pho deu bao g6m 2 dinh ling vai bu6e
song 390 nm trong vting UV va 509 nm trong vung anh sang xanh.


150

Q.

-ii 100

n
O
X

x = 0.12

x= 0 03

50
X = 0,09

0 06

300

400

500

600

Wavelength (nm)

Hinh 9: ph6 huynh quang ciia mlu mang Zni.^P^O tai at 300 K, buac song ciia anh
sang kich thich X^^^. = 325 nm
4. Ket luan.
Chung loi da thanh cong trong viec che tao ban din ZnO pha tap P loai p.
Cac tinh cha't ca'u true va tinh cha't quang cua ta't ca cac miu deu dupe nghien cuu
mot each chi tiet. Cac day nano ciia he vat lieu nay c6 kich thu6e tir lOnm den 20
nm va chieu dai ca micro met. Ph6 huynh quang ciia tat ca cac miu bao gom hai
dinh CO bu6c song 390 nm va 509 nm trong viing UV va viing anh sang xanh tuong
umg.
5. Tai lieu tham khao:
[1] J.G.Lu, S.Fujita, T.Kawaharamura, H.Nishinaka, Roles of hydrogen and
nitrogen in p-type doping of ZnO, Chemical Physics Letters 441 (2007) 68 71.
[2] Xiaodan Zhang, Hongbing Fan, Jian Sun, Ying Zhao, Structural and
electrical properties of p-type ZnO films prepared by Ultrasonic Spray
Pyrolysis, Thin Solid Films 515 (2007) 8789- 8792.
[3] Z.G.Yu, P.Wu, H.Gong, Theoretical and experimental studies on oxygen
vacancy in p-type ZnO, Physica B 401 - 402 (2007) 417 -420.
[4] J.C.Fan, Z.Xie, Q.Wan, Y.G.Wang, As-doped p-type ZnO films prepared by
cosputtering ZnO and Zn^Asi targets. Journal of Crystal Growlh 307 (2007) 66
-69.

[5] T.H. Vlasenflin, M. Tanaka, p-type conduction in ZnO dual-acceptor-doped
with nitrogen and phosphorus. Solid State Communications 142 (2007) 292294
[6] F. Izumi and T Ikeda. Mater. Sci. Forum 321-324 (2000) 198.


Tom tdt cac cong trinh NCKH cua ca nhan
Nganh : Vat ly ; Chuyen nganh: Khoa hoc Vat lieu
1. Ho va len (cac) lac gia cong trinh: Ngo Thu Huong
2. Nam: 2008
3. Ten bai bao:
" Tmh chat ca'u Iriic va linh chat quang cua he vat lieu Zn,.^P,0"
4. Ten Tap chi/Sach/Tuyen tap Hoi nghi. So, trang: Tap chi khoa hoc Toan Vai ly Dai hoc Qu6'c gia Ha noi, Volum 24, so IS, trang 166 - 169.
5. Tom lit cong trinh bing lieng Viet:
"Cac miu ZnO pha tap phospho khoi va mang dirac tao bing hai phuong
phap gom va phtrong phap boc bay nhiet. Tinh chal ca'u true va tinh chat
quang cua he vat lieu Zn^.^P^O nay da dupe khao sat. Pho X-ray chi ra ring
dinh (002) dich ve phia goc nho. Cau triic nano Ihu dirpc bing viec dieu
khien ly le khi, nhiet do nguon va nhiet do de. Cac day nano cua he vat lieu
nay c6 dp Idn cQ 10 nm va dai khoang vai micromel".
6. Tieng Anh
Author: Ngo Thu Huong
Year: 2008
Title:"The crystal structure and optical properties of the Zn|.^P^O
compounds "
VNU Journal of Science Mathematics - Physics 24, No IS (2008) 166 - 169.
Abstract: "Phosphours (P) doped ZnO bulk and thin film were grown by
both ceramic and thermal evaporation methods. Crystal structure and optical
properties of the Zn,.^P^O compounds were investigated. The X-ray
diffraction showed that the ZnO (002) peak shifted to lower angle. The nanostructure was archived by control the gas ratio, heating temperature and
substrate temperature. The nanowires of these compounds is about 10 nm in

size and some micrometers in the length for thin films".


Truong Dai hoc Khoa hoe Tu nhien
Khoa Vat ly

Xac nhan hu'ang dan tham gia nghien ciru khoa hoc
thuoc de tai cac cap DHQGHN
Ban ehii nhiem Khoa Vat ly xac nhan sinh vien Chu Thi Thu K50
tham gia nghien cuu khoa hoc tir thing 4/2008 duoi su huong dan ciia Tien
sT Ngo Thu Huong voi de tai: Nghien emi sir anh huong ciia che dp cong
nghe den su hinh thanh cau true nano eiia vat lieu ZnO pha tap phospho.
Hd noi, ngdy 2 thang 2 nam 2009

Chii nhiem Khoa Vat ly

^ ^

^ A ^

^^^^


JO!
TRUONt; HAi il()(^ KHOA IKK 1IJ NIIIKN

CONG IIOA XA HOI CUV NGIIIA VlIT NAM
IhW l;ip - tu do - ilaiih pluic

'

lid Noi, ngdy OS'thdng ^ nam 2007

QUYHTDINII CUA IIIHU TRIJ('5NG TRlXM} DA! HOC KHOA HOC ll/NHIHN
V/v: c6ng nhan d6 tai luan an tien sT va can bp huong din nghien cuu sinh nam 2006

HIEU TRUdNG TRUING DAI HOC KHOA HOC TU NHIEN
- Can ci( Quy dinh ve to chi'tc vd hoat dpng trong Dai hoc Quoc gia Hd Noi
dim- ban hdnh theo Quyet dinh sdOOOfrCCB ngdy 01110/2001 ciia Giam doc Dai hoc
Quoc gia Hd Noi;
- Can ci( Quy che Ddo tao sau dai hoc ditgc ban hdnh theo Quyet dinh so
I8/2000/QD-BGD&DT ngdy 081612000 cua Bo trifdng Bp Gido due vd Ddo tao; '
- Can c(( Quy che Ddo tao sau dai hoc a Dai hoc Quoc gia Hd Noi duac ban
hdnh theo Quyet dinh sd 15IDT ngdy 0910212004 cua Giam doc Dai hoc Quoc gia
HdNpi;
- Can ci( cac Quyet dinh sd 22591SDH ngdy 07/12/2006, sd 2376/SDH ngdy
14/12/2006, sd2677/SDH ngdy 29112/2006 cua Giam doc Dai hoc Quoc gia Hd Npi ve
viec cong nhan nghien ci(u sinh nam 2006 ciia trifdng Dai hoc Khoa hoc Tu nhien Dai hoc Quoc gia Hd Npi;
- Theo de nghi ciia cdc ong: Tritdng phong Sau dai hoc, Chu nhiem Khoa Vat ly,
QUYET DINH
Dieu 1: Cong nhan de tai luan an tien si va ngu6i huong din cua nghien curu sinh
Nguyen Viet Tuyen, nhu sau:
Ten de tai:
Che tao va nghien cihi cac tinh chat cua mang mong va
vat lieu cau true nano tren ca so oxit kem pha tap chit va
kha nang utig dung ciia chiing.
Chuyen nganh:
Vat ly chat rin; ma so: 62 44 07 01.
Can bo huofng din: HOC: PGS. TS Ta Dinh Canh, Tru6ng Dai hoc Khoa hoc
Tunhien - DHQGHN;

HDP: TS. Ngo Thu liirong. TrU(tng Dai hoc Khoa hoc Tu
nhien - DHQGHN.
I linh thuc dao tao: Tap trung, 4 nam (2006 - 2010).
Dieu 2: Nguai huofng din nghien cuu sinh c6 nhiem vu va quycn lai ghi tmng
Quy che Dao tao sau dai hoc hien hanh.
Dieu 3: Cac ong (ba): Truang phong Sau dai hoc, Chii nhiem Khoa Vat ly, Thii
truong cac don vi lien quan, nghien cuu sinh va nguai huong din c6 ten trong
Dieu I chju trach nhiem ihi hanh Quyet dinh nay.
U IRUONG
J TRU6NG

iNoi nhan:

. Nhu OKU 3:
l.iru-SDII

^

JLi&TSTrunNghi

ry^


AI HOC QUOC GIA HA NOI
ETNAM NATIONAL UNIVERSITY, HANOI

I5SNDB66-B612

KHO
JOURNAL

TO
MATHE

Volume24, No IS, 2008


VIETNAM NATIONAL UNIVERSITY, HANOI
JOURNAL OF SCIENCE
MATHEMATICS - PHYSICS
Vol. 24, No. IS, 2008

CONTENTS

1.
2.
3.
4.
5.
6.
7.
8.
9.

Tran Thi Quynh Hoa, Nguyen Ngoc Long, Nguyen Hoang Hai, Stmctural and optical
properties of ZnS nanoparticles synthesized by sonoelectrochemical method
Pham Van Nho, Duong Dinh Thuan, Effect of htanium doping on characteristics
of nano crystalline In203 films
Pham Hoang Ngan, Nguyen Quang Tien, Pham Van Nho, Preparation of nitrogen doped
nanocrystalline Ti02 photocatalyst films by using spray pyrolysis

Nguyen Van Hung, Le Thi Hong Lien, Nguyen Cong Toan, High-order anhamionic
effective potentials and EXAFS cumulants of fee crystals containing doping atom
Nguyen Thanh Huy, Luu Tuan Tai, Coexistence of ferromagnetism and superconductivity
in the single crystal UCoGe
Nguyen Mau Chung, The Ha Noi GPHE and B Physics
Nguyen Mau Chung, Nguyen Anh Due, Nguyen Xuan Giao, Nguyen To Nga, Meson
reconstruction: Preliminary results
Ngo Thu Huong, Do Thi Kim Anh, Thermoelectric performance of CoSb3 skutterudites
under high pressure
Ngac An Bang, Phung Thi Thorn, Nguyen Trong Thanh, Surface plasmon resonance of

1
5
9
13
18
22
27
31

gold nanoparticles
10. Le Van Vu, Nguyen Ngoc Long, Chu Dinh Kiem, Sai Cong Doanh,
Cao Thi Nguyet, Pham Thi Hang, Nguyen Duy Thien, Bui Quoc Trung, Synthesis and
optical properties of gold and silver nanoparticles

35

39

11. Hoang Dinh Trien, Nguyen Quang Bau, Nguyen Thi Thanh Nhan. Influence of magnetic

field on the nonlinear absorption coefficient of a strong electromagnetic wave by confined
electrons in quantum wires

47

12. Dinh Due Linh, Phung Quoc Thanh, Bach Thanh Cong, Some physical properties of the
CaossProisMni-^u^Os perovskites prepared by sol-gel technology

51

13. Tran Minh Thi, Pham Van Ben, Nguyen Minh Vuong, Le Thi Thu Huyen,
Microstructure and optical property of polymer-capped ZnS:Cu nanocrystalline thin
films

55


14. Dang Thi Thanh Thuy, Vu Tuan Anh, Pham Van Thanh, Bach Gia Duong,
Development of A flexible environment for the composition of the national suvereinty
identification codes

60

15. Dang Thi Thanh Thuy, Pham Van Thanh, Nguyen Anh Tuan, Bach Gia Duong,
Research, design and fabrication of the 45W and the 200W, L-Band power amplifier using
the modem microstrip technology for application in the national sovereignty identification
coding system

54

16. Vu Thi Thanh Thuy, Nguyen Thi Thuc Hien, Pham The Kien, Ngo Xuan Dai,
Le
Van Vu, Nguyen Ngoc Long, Ta Dinh Canh, Controlable growth of ZnO nanostruciures by
simple chemical method
17. Nguyen Trong Thanh, Vu Xuan Quang, Nguyen Quang Liem, Vu Phi Tuyen, M.
Nogami, Ngac An Bang, Persistent spectral hole burning in Eu^* -doped Aluminosilicate
glasses prepared by sol-gel process
18. Le Quang Thao, Bui Quang Huy, Nguyen Van Hai, Nguyen Thi Thu, Building an RF
remote control
19. Hoang Ngoc Thanh, Nguyen Minh Due, The mechanical and superconducting properties of
the YBa2Cu307-6 synthesized by the pyrolytic citrate method
20. Giang Manh Khoi, Trinh Dinh Chien, Calculate and optimize the density of ions Er^* and
ions Yb^^ in the active medium of Erbium-Glass laser
21. Nguyen Due Tan, The CCR method and GEOCAP-1 equipment

68

72
76
80
85
89

22. Le Van Thanh Son, Trinh Due Quang, Vu Xuan Quang, Nguyen Trong Thanh, Ngac
An Bang, The role of alkali ions in the thermoluminescent peak at 200 K of natural quartz of
Vietnam
23. Nguyen Suan Han, Eikonal representation for scattering of the dirac particles on the
gravitational potential
24. Vu Van Khai, Dao Thi Hoa, Vu Thanh Mai, Nguyen Huy Sinh, Large magnetic entropy
change in ceramic manganite compounds of Lai.xCaxMnOs and their ability application

101

25. Ta Van Khoa, Luu Tuan Tai, Than Due Hien, Nguyen Khai Hoan, Structure and
magnetic properties of [FePt/Fejn multilayer thin films with Cu and B addition

105

93
97

26. N.V. Du, D.L. Minh, N.N. Dinh, N.T. Thuy, N.D. Manh, The structure and magnetic
property of nano-perovskite LaFeOs prepared by Citrate-gel, Co-precipitation and High
energy milling methods
27. Nguyen Due Minh,

109
First

correction

of

high

energy

scattering

amplitude

and quasi-potential equation
28. Pham Van Ben, Bui Hong Van, The radiative transition relating to Fe^^(3d^) in ZnSe crystal

113
117

29. Pham Van Thin, Nguyen The Binh, ZnO random microlaser excited by nanosecond laser
pulses
30. Trinh Dinh Chien, Bui Van Hai, Bui Xuan Kien, The influence of linear chirp on the
width of pulse in dispersion medium of single mode optical

fibre

^^^
125


31. Do Trung Kien, Bach Gia Duong, Simulation of altemative transmission of barker code
and M-code in radar system to detect near and far targets
32. Nguyen Hoang Hai, Nguyen Hoang Luong, Nguyen Dang Phu, Tran Quoc Tuan,
Preparation and applications of Fe304 and FePt nanoparticles
33. Luu Tuan Tai, Magnetic properties of La|.KRx(Ni-M)5 base compounds as negative
electrode in rechargeable Ni-MH batteries
34. Ta Dinh Canh, Nguyen Viet Tuyen, Nguyen Ngoc Long, Hoang Minh Tuan, Bui
Nguyen Quoc Trinh, Zhongrong Shen, Synthesis of zinc oxide nanopowders via microwave
irradiation
,
35. Ngo Thanh Dung, Nguyen Thi Thuc Hien, Le Thi Thanh Binh, Do Due Dai, Nguyen
Mau Cu, Preparation of ZnO nanostructures by hydrothenmal method

36. Le Van Vu, Nguyen Ngoc Long, Ha Tien Vinh, Nguyen Duy Thien, Preparation and
investigation of the nanostnictured InjOs films by a vapor transport and condensation method
for gas sensor
37. Pham Van Ben, Bui Hong Van, Do Xuan Tien, Phan Trong Tue, Determination of
fluorescent life-time of ZnS, ZnS:Cu and ZnS:Mn materials by time-resolved
photoluminescence spectra
38. Vu Xuan Phuc, Luu Tuan Tai, Influence of grain size on the electrochemical properties of
LaNis.xSix compound using for Ni - MH battery
39. Ngo Thu Huong, The crystal structure and optical properties of the Zn^^P^O compounds
40. Pham Hong Quang, Ngo Dinh Sang, Studies of Ali.^CrxN and AIMHXN magnetic
semiconductor thin
films
41. Nguyen Thanh Binh, Le Thi Thanh Binh, Nguyen Tu Niem, Nguyen Viet Due, Nguyen
Ngoc Long, Synthesis and characterization of Sn02 nanopowders
42. Nguyen Van Hung, Le Quoc Hung, and Tong Sy Tien, Calculation of EXAFS cumulants
of bcc crystals using quantum theory and anharmonic effective potentials
43. Nguyen Van Hung, Do Thai Hung, Nguyen Bao Trung, High-order anharmonic effective
potentials and EXAFS cumulants of bcc crystals applied to high-temperatures up to melting
point
44. Do Trung Kien, Nguyen Due Thang, Bach Gia Duong, Radar digital filters design with
VHDLandFPGA
45. Dang Thi Thanh Thuy, Pham Van Thanh, Do Trung Kien, Bach Gia Duong,
Application of Frequency composition and microprocessor to broadcast in microwave region
46. Tran Minh Thi, Pham Van Ben, Nguyen Minh Vuong, The optical properties of the
polymer-capped ZnS:Mn nano thin
films
47. Ta Quynh Hoa, Le Viet Du Khuong, Tran Hai Dang, Combined symmetrical dipole
electric sounding

129

133
I4|

146
150

154

158
162
166
170
174
178

183
188
192
196
201

48. Khoi Giang Manh, Chien Trinh Dinh, Consideration for the efficiency of Erbium - Glass
Laser with active medium is Ytterbium-Erbium Co-doped Phosphate glass

205


VNU Journal of Science. Mathematics - Physics 24, No. IS (2008) 166-169

The crystal structure and optical properties

of the Zni.xPxO compounds
Ngo Thu Huong*
Faculty ofPhysics, College of Science. VNU 334 Nguyen Trai, Hanoi, Vietnam
Received 17 November 2008

Abstract. Phosphours (P) doped ZnO bulk and thinfilmwere grown by both ceramic and thermal
evaporation methods. Crystal stnicture and optical properties of the Zni.xPxO conpounds were
investigated. The X-ray diffraction showed that the ZnO (002) peak shifted to lower angle. The
nano-stmcture was archived by control the gas ratio, heating temperature and substrate
ten^erature. The nanowires of these con^>ounds is about 10 nm in size and some micrometers in
the length for thin films.
Keywords: P-doped ZnO; Thermal evaporation; Photoluminescence .

1. Introduction
ZnO based electronic devices have attracted increasing interest as the backplanes for
applications such as active-matrix liquid crystal displays and active-matrix organic light emitting
diodes [1,2]. Most of these electronic devices employ the electrical behavior of «-type semiconducting
active oxides. However, p-type ZnO films can be produced by substituting group V elements (N, P,
and As) for the O sites or group I elements (Li, Na, and K) for Zn sites [3,4]. However, the
achievement of/7-type ZnO is a difficult task due to self-compensation induced from intrinsic donor
defects, such as O vacancies and Zn interstitials, or an unintentional exUinsic donor such as H [5,6]. In
addition, the strongest candidates for p-type dopants, group V elements, have low solubility, which
would theoretically result in a deep acceptor level.
In this work, we report about the crystal structure and optical properties of the Zn,.xPxO (x =
0.00, 0,03, 0.06; 0.09 and 0.12) compounds, which were grown by both ceramic and thermal
evaporation methods.
2. Experimental
The Zni ^P^O compounds were prepared by both ceramic and thermal evaporation methods.
For the bulk samples: the powders of ZnO (99 %) and P2O5 (99,9%) were well mixed and then heated
at 750 °C 900 °C 1100 °C for 10 hrs and then cooled to the room temperature. For the thin film

E-mail:
166