Photoresponse of colloidal quantum dots - conducting SnO2 matrix composite

Авторы: Vasiliev R.B., Dirin D.N., Babynina A.V., Dorofeev S.G., Rumyantseva M.N., Gaskov A.M.
Сборник: In “Molecular and Nanoscale Systems for Energy Conversion"
Год издания: 2008
Место издания: Nova Science Publishers, Inc. (N.Y.)
Первая страница: 133
Последняя страница: 138
Аннотация: Photoconductivity of composite based on CdSe quantum dots - conducting nanocrystalline SnO(2) matrix have been investigated. Colloidal CdSe nanocrystals were synthesized with the use of oleic acid as a tabilizer. CdSe nanocrystals mean size was found to be 3.1 nm with a low size distribution (< 8%). According to the results. of X-ray diffraction tin dioxide matrix consist of nanocrystallites with an average size of about 25 nm. Considerable (as large as 100 times) photoresponse under the illumination with wavelength correlated to lower quantum transition 1 S(h)3/2 -> 1 S(e) (550 nm for mentioned QDs size) were observed. Kinetic dependences were characterized by quite a fast response (typically similar to 100 ms) and delayed (typically similar to minutes) dark relaxation.
Добавил в систему: Васильев Роман Борисович

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