Tunable photovoltaic effect and solar cell performance of self-doped perovskite SrTiO3
Source abstract
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.
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Research context
OpenAlex topics: Electronic and Structural Properties of Oxides · Perovskite Materials and Applications · Ferroelectric and Piezoelectric Materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Nanyang Technological University 1 Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, , 21 Nanyang Link, Singapore 637371, Singapore
Nanyang Technological University 2 School of Electrical and Electronic Engineering, , Singapore 639798, Singapore
Chinese Academy of Sciences 3 Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, , Beijing 100190, P. R. China
Funding
National Natural Science Foundation of China
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