Enhanced photocurrent via ferro-pyro-phototronic effect in ferroelectric BaTiO3 materials for a self-powered flexible photodetector system

Kun Zhao, Bangsen Ouyang, Chris R. Bowen, Ya Yang

Research output: Contribution to journalArticle

Abstract

Some ferroelectric materials have demonstrated both pyroelectric and photovoltaic effects for scavenging thermal and solar energies. However, how to couple pyroelectric and photovoltaic effects in ferroelectric materials remains a challenge. Here, a ferro-pyro-phototronic effect based on coupling pyroelectric and photovoltaic effects has been utilized to enhance the photocurrent in a ferroelectric BaTiO3-based flexible photodetector system. As compared with a purely photovoltaic system, the corresponding current peak and plateau were 451.9% and 17.2% higher in the coupled photovoltaic-pyroelectric system, respectively. The results can be explained by ferro-pyro-phototronic effect with an induced energy band bending. As a demonstration of its potential application, we developed a sensing system that is suitable for detecting and recognizing both light and temperature variations by recording the electrical signals mapped as an array.

Original languageEnglish
Article number105152
JournalNano Energy
Volume77
Early online date26 Jul 2020
DOIs
Publication statusE-pub ahead of print - 26 Jul 2020

Keywords

  • BaTiO
  • Ferro-pyro-phototronic effect
  • Photodetector systems
  • Photovoltaic effect
  • Pyroelectric effect

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)
  • Electrical and Electronic Engineering

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