Photoconductivity of structures based on the SnO2 porous matrix coupled with core-shell CdSe/CdS quantum dots

Drozdov, K. A.; Kochnev, V. I.; Dobrovolsky, A. A.; Popelo, A. V.; Rumyantseva, M. N.; Gaskov, A. M.; Ryabova, L. I.; Khokhlov, D. R.; Vasiliev, R. B.
September 2013
Applied Physics Letters;9/23/2013, Vol. 103 Issue 13, p133115
Academic Journal
Embedding of quantum dots into porous oxide matrixes is a perspective technique for photosensitization of a structure. We show that the sensitization efficiency may be increased by the use of core-shell quantum dots. It is demonstrated that the photoresponse amplitude in a SnO2 porous matrix with CdSe/CdS quantum dots depends non-monotonously on the number of atomic layers in a shell. The best results are obtained for SnO2 matrixes coupled with the quantum dots with three atomic layers of a shell. Mechanisms responsible for the structure sensitization are discussed.


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