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

K. X. Jin, Y. F. Li, Z. L. Wang, H. Y. Peng, W. N. Lin, A. K.K. Kyaw, Y. L. Jin, K. J. Jin, X. W. Sun, C. Soci, Tao Wu*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

25 Scopus citations

Abstract

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.

Original languageEnglish (US)
Article number042131
JournalAIP Advances
Volume2
Issue number4
DOIs
StatePublished - Dec 1 2012

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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