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..







SnO2 CdSe/CdS

01.04.10 ­

-

2015


..

: - , , - , ,

: .-. , .-. , -

: ( ) « «»


, . . , . ­ 10 , . , , [1]. , , . -, ; . , , , , .

, . -, .


. -, . A2B6 (CdSe, CdTe, CdS ZnSe) A3B5 (InP InAs) . A2B6. CdSe. , 2-10 , , . CdSe CdSe/CdS CdS . () (CdSe - 6.05 , CdS ­ 5.82 ) , , SnO2. . , CdSe SnO2. SnO
2



CdSe/CdS.


CdSe CdS CdSe/CdS. : 1. SnO2, CdSe ,

CdSe/CdS CdS. 2. SnO2, CdSe CdSe/CdS CdS. 3. , . , : 1. , SnO2-QD , . , : . 2. , CdSe

S n O 2 -Q D

. 3. , SnO2-QD CdSe/CdS CdS 2 . , : .


, - . , . , , , . , . . , , European Conference on Individual Monitoring of Ionizing Radiation (, , 2010), XV « » ( , , 2011), 13th International Conference on the Formation of Semiconductor Interfaces, ICFSI-13 (, , 2011), 12th International Conference "Optics of Excitons in Confined Systems", OECS12 (, , 2011), XIII - (, , 2011), 31st International Conference on the Physics of Semiconductors (, , 2012), XIX




, 2012),

4









(, , 2012 ).





" " (,

13 , 4 9 . CdSe, CdSe/CdS, SnO2; SnO2-CdSe, SnO2- CdSe/CdS, , . .


, , 94 . 111 , 41 4 . , , . , . ;

. , , . , CdSe c 3-5 . , . ­ . , ,

2D . . ,


. . , . . . . CdSe CdS . , . . CdSe-CdS (~0.5 ) . (~0.1 ) , CdSe/CdS. . ( ) ( ). ,


. , , . , . . , . CdSe/CdS SnO2. SnO2 . , . . ( ) . , . , , ; . . ,


. . . CdSe . : () , [2]. 2.7, 3.8, 4.7 . CdSe/CdS CdS . CdS CdSe 3.5 . CdSe/CdS . ; CdS. SnO
2

.

CdS 1, 3, 4





:



SnO2 20 ; 1 . 450-750 . , SnO
2

24 , . SnO2-CdSe , .


3-5 CdSe. Cd, Se . SnO2-CdSe 560 , CdSe . , CdSe SnO2. SnO2 c CdSe . SnO2 [3]. 200
100

, m kS

10


1 0,3 0,6 0,9 1,2
-1

. ,

2.7 4.7 2.7 4.7
1,5



100/T, K

,

. 1. SnO2 CdSe ( ) ( ). .

(. 1). EA (T ) exp(- E A / kT ) .


SnO2



SnO2-CdSe EA ~ 45 , 0.3 . , CdSe . , , , ~ 40 2.7 ~ 43 4.7 . EA 0.5 . /0 (0 - ) (2.7 ) (4.7 ) . 2.
. 2. /
0

, . ; .

SnO2-CdSe. . . T = 300K.

.


. , . , , . ), (s -

, (. . 1). (t) t, 1 [4] , 1 5 ,
. 3. CdSe.







. 60 .

. 3. ,

SnO2-CdSe



. . T = 300K.



. :


. , , , SnO2-CdSe. CdSe
.

625

Position of maximum, nm

600 575
a

550 525 500 2, 5
b

2.7 17 . (. 3).

3,0

3,5


4, 0


4,5


5,0


Core size, nm
3. CdSe (a) SnO2-CdSe (b). T = 300K.



[5] : , , . , , . CdSe SnO2,



1



.














2.7

.
300

() / (300)

,
4.7



0,1 0,4 0,6 0,8 1,0
-1

1,2

1,4

(T)/ . 4.

(

300

-

100/T, K

T = 300K),

. 4 (T)/300 SnO2-CdSe. T = 300K.

SnO2 c CdSe/CdS CdS. CdS CdSe (. 5) 570 ( CdSe) 615 ( CdSe/CdS 4 ). 585 to 622 ( . 5). . CdSe-CdS . .


CdS ( . 5 ). 1 .
Absorbance, arb. un.


3,5
1 1



3,0
PL Intensity

3

2,5 2,0 1,5 1,0 0,5 0,0 450 500 550

4 0

0 500 600 700 W a v e le n g th , n m

0 1 34

CdS . 3 4

600

650

700

Wavelength, nm
. 5 CdSe/CdS . CdS .



.

CdSe/CdS

(Invitrogen) 95% 460 . 470-700 . : = R
I AR n (R ­ I R A nR

, I ­ , , IR ­ , ­ , AR ­


, n ­ , nR ­ ). 15% CdSe 46% CdSe/CdS 1 . , 1 3 CdS. CdSe . . , ; , . 3 , CdSe SnO2 .
. 6. /
0

CdSe



.



SnO2-CdSe/CdS. CdS . . T = 300K.

.


CdSe/CdS , CdSe. , SnO2-CdSe/CdS (. 6). .

(. . 6), , CdSe, , . SnO2-CdSe/CdS .
0,04 3





,

, 3. 7. CdS.
0,00 550 600 650 700 750 1


/
4

CdSe/CdS (. 5)
0





. CdS CdSe .

Wavelength, nm
. 7. /
0



SnO2-CdSe/CdS. CdS . T = 300K.

, 3 .


CdS , CdSe/CdS SnO2, . , . , 3, (. 8) E
A



10

-3

3m l dar k

3ml light

SnO2-CdSe/CdS
, S





10

-4

EA. ,
0 m l dar k
10
-5

0ml light
0,6 0,8 1,0
-1



0,2

0,4

1,2

1,4


SnO2-CdSe/CdS. T = 300K.

100/T, K

. 8.

, 2.0, 6.3, 12.0, 8.1 SnO2-CdSe/CdS CdS 0, 1, 3, 4 . EA 0.4 . , CdSe/CdS 3 .

1. , CdSe, CdSe/CdS SnO2.


.



,





. 2. , SnO2-QD ,

. , : . 3. , SnO2-QD

, . .

CdSe, CdS . 4. , CdSe

SnO2-QD . 5. , CdS CdSe


. 6. ,

CdSe/CdS S n O 2 -Q D

CdS. . 7. , SnO2-QD CdSe/CdS CdS 2 . , :

.

1. A. Dobrovolsky, R. Vasiliev, K. Drozdov, O. Maslova, M. Rumyantseva, A. Gaskov, L. Ryabova, and D. Khokhlov. Optical and photoelectric properties of nanocrystalline SnO2 - CdSe quantum dot structures. // Phys. Status Solidi C. - 2010. - 7. - No. 3­4. 972­975 2. R. Vasiliev, A. Babynina, O. Maslova, M. Rumyantseva, L. Ryabova, A. Dobrovolsky, K. Drozdov, D. Khokhlov, A. Abakumov, A. Gaskov. Photoconductivity of


nanocrystalline SnO2 sensitized with colloidal CdSe quantum dots // J. of Mat. Chem. . - 2013. ­ 1. - p. 1005-1010. 3. . , . , . , . , . , . , . , . , . . SnO2, CdSe. // . - 2013. - 47. - 3. - . 360-363.4.K. 4. K. Drozdov, V. Kochnev, A. Dobrovolsky, A. Popelo, M. Rumyantseva, A. Gaskov, L. Ryabova, D. Khokhlov and R. Vasiliev. Photoconductivity of structures based on the SnO2 porous matrix coupled with core-shell CdSe/CdS quantum dots // Appl. Phys. Lett. - 20013. ­ 103. ­ 133115.

5. A. Dobrovolsky, K. Drozdov, R. Vasiliev, L. Ryabova, D. Khokhlov, O. Maslova, A. Popelo, M. Rumyantseva, A. Gaskov. Photosensitization of nanocrystalline SnO2 films with CdSe quantum dots. Proceedings of European Conference on Individual Monitoring of Ionizing Radiation, 8 ­ 12 March, 2010. 6... , .., .., .., .., .., .., ... CdSe/CdS (-). XV

« », 14 - 18 , 2011. 7.A. Dobrovolsky, K. Drozdov, R. Vasiliev, A. Babynina, A. Popelo, M. Rumyantseva, A. Gaskov, L. Ryabova, D. Khokhlov. Photoelectric properties of mesoporous SnO2


films sensitized with CdSe/CdS quantum dots. Proceedings of 13th International Conference on the Formation of Semiconductor Interfaces (ICFSI-13),3-8 July, 2011. 8.K. Drozdov, A. Dobrovolsky, R. Vasiliev, A. Babynina, A. Popelo, M. Rumyantseva, A. Gaskov, L. Ryabova, D. Khokhlov. OPTICAL PROPERTIES OF CdSe/CdS CORE/SHELL QUANTUM DOTS - SnO2 NANOCOMPOSITE. Proceedings of 12th International Conference "Optics of Excitons in Confined Systems" (OECS12)12 - 16 September 2011. 9.. . . , . , . , . , . , . , . . CdSe/CdS. 2012,24 - 27 2012 . 10.K. Drozdov, A. Dobrovolsky, R. Vasiliev, A. Babynina, M. Rumyantseva, A. Gaskov, L. Ryabova, D. Khokhlov. Photoconductivity induced by incorporation of CdSe/CdS core/shell quantum dots into SnO2 matrix. Proceedings of 31st International Conference on the Physics of Semiconductors July 29th ­ August 3rd 2012. 11.. , . , . . SnO2-CdSe (-). XIII - . 21­25 2011 . 12.K. Drozdov, A. Dobrovolsky, R. Vasiliev, A. Babynina, M. Rumyantseva, A.

Gaskov, L. Ryabova, D. Khokhlov. Photoconductivity induced by incorporation of


CdSe/CdS core/shell quantum dots into SnO2 matrix. 4 "

", 2012 . 13.V. Kochnev, K. Drozdov, A. Dobrovolsky, R. Vasiliev, A. Popelo, M. Rumyantseva, A. Gaskov, L. Ryabova, D. Khokhlov. Efficiency of the photoexcited charge carriers transport in SnO2-CdSe structures depending on the size of CdSe nanocrystals. XIX . 20-25 2012 .

1. D. Talapin, Jong-Soo Lee, M. Kovalenko, and E. Shevchenko. Prospects of Colloidal Nanocrystals for Electronic and Optoelectronic Applications. // Chem. Rev. - 2010. - 110. ­ 389-458. 2. J. Jasieniak, L. Smith, J. van Embden, P. Mulvaney. Re-examination of the SizeDependent Absorption Properties of CdSe Quantum Dots. // J. Phys. Chem. C. - 2009. 113. - 19468­19474.3. R. Vasiliev, S. Dorofeev, M. Rumyantseva, L. Ryabova, and A. Gaskov. Impedance spectroscopy of ultrafine-grain SnO2 ceramics with a variable grain size // Semiconductors. -2006. - 40(1). - 104-107. 4. . , . . // . - 1976. - . 10. - . 209.