The research investigates the superliner photovoltaic effect related with the alteration of pCu2S-nSi heterojunctions by introducing a silicon nanocluster subsystem at the junction border. A photocell with two sequentially articulated p-n junctions of counter action that are photoactive in separate parts of the spectrum is proposed. We demonstrate that film heterojunctions with a nanocluster subsystem differ from the non-clustered variant. Heterophotocells without a nanocluster subsystem always have sublinear or, in rare cases, linear lux-ampere characteristics (up to illumination 5 104 lx), whereas introducing nanocluster centres into the base p-region of the Cu2S-Si heterojunctions results in a significantly higher integral sensitivity at high illumination of the samples in the mode of a valve photocell. When the size of NC centres is increased to hundreds or more angstroms, the photoeffect is not only not amplified, but entirely disappears, giving place to a new effect of superlinearity of the lux-ampere characteristic. The newly discovered superliner photoeffect in a heterophotocell based on an NCS increases cell photosensitivity under high illumination.
Author(S) Details
V. V. Kovalchuk
State Environmental University, Odesa, Ukraine.
View Book:- https://stm.bookpi.org/RTCPS-V7/article/view/5995
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