Journal
SEMICONDUCTOR SCIENCE AND TECHNOLOGY
Volume 23, Issue 9, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0268-1242/23/9/095025
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CdSe nanocrystals (NCs) embedded in SiO2 thin films were prepared using RF-magnetron co-sputtering. The average NC size was estimated to be 18 nm. The dark and photocurrent temporal dependences have been measured as a function of the magnitude of applied voltage (50-150 V). Annealing the samples seems to improve the photoconductivity (similar to 10(-12) Omega(-1)) that increases with the film thickness and slightly changes under the bias voltage. Furthermore, the photovoltage measurements showed that a concentration of CdSe in the range of 27 mol% leads to the generation of a photovoltaic signal up to 5 V at 400 mu W cm(-2). These results demonstrate the potential of silica films with embedded CdSe NCs for photovoltaic applications.
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