Tunable photovoltaic effect and solar cell performance of self-doped perovskite SrTiO3

Tunable photovoltaic effect and solar cell performance of self-doped perovskite SrTiO3

We report on the tunable photovoltaic effect of self-doped single-crystal SrTiO3 (STO), a prototypical perovskite-structured complex oxide, and evaluate its performance in Schottky junction solar cells. The photovaltaic characteristics of vacuum-reduced STO single crystals are dictated by a thin sur...

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Bibliographic Details
Main Authors: Jin, K. X., Li, Y. F., Wang, Z. L., Lin, W. N., Jin, Y. L., Jin, K. J., Soci, C., Peng, Haiyang, Kyaw, Aung Ko Ko, Sun, Xiaowei, Wu, Tom
Other Authors: School of Physical and Mathematical Sciences
Format: Article
Language:English
Published: 2013
Online Access:https://hdl.handle.net/10356/96100
http://hdl.handle.net/10220/10091
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Institution: Nanyang Technological University
Language: English
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Summary:We report on the tunable photovoltaic effect of self-doped single-crystal SrTiO3 (STO), a prototypical perovskite-structured complex oxide, and evaluate its performance in Schottky junction solar cells. The photovaltaic characteristics of vacuum-reduced STO single crystals are dictated by a thin surface layer with electrons donated by oxygen vacancies. Under UV illumination, a photovoltage of 1.1 V is observed in the as-received STO single crystal, while the sample reduced at 750 °C presents the highest incident photon to carrier conversion efficiency. Furthermore, in the STO/Pt Schottky junction, a power conversion efficiency of 0.88% was achieved under standard AM 1.5 illumination at room temperature. This work establishes STO as a high-mobility photovoltaic semiconductor with potential of integration in self-powered oxide electronics.

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