Photovoltaic Effect of a Ferroelectric-Luminescent Heterostructure under Infrared Light Illumination

Date

2018

Authors

Mai, Haoxin
Lu, Teng
Li, Qian
Sun, Qingbo
Vu, Khu
Chen, Hua
Wang, Genmiao
Humphrey, Mark
Kremer, Felipe
Li, Li (Lily)

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Volume Title

Publisher

American Chemical Society

Abstract

In this report, a ferroelectric-luminescent heterostructure is designed to convert infrared light into electric power. We use BiFeO3 (BFO) as the ferroelectric layer and Y2O3:Yb,Tm (YOT) as the upconversion layer. Different from conventional ferroelectric materials, this heterostructure exhibits switchable and stable photovoltaic effects under 980 nm illumination, whose energy is much lower than the band gap of BFO. The energy transfer mechanism in this heterostructure is therefore studied carefully. It is found that a highly efficient nonradiative energy transfer process from YOT to BFO plays a critical role in achieving the below-band-gap photon-excited photovoltaic effects in this heterostructure. Our results also indicate that by introducing asymmetric electrodes, both the photovoltage and photocurrent are further enhanced when the built-in field and the depolarization field are aligned. The construction of ferroelectric-luminescent heterostructure is consequently proposed as a promising route to enhance the photovoltaic effects of ferroelectric materials by extending the absorption of the solar spectrum.

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Citation

Source

ACS Applied Materials and Interfaces

Type

Journal article

Book Title

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Access Statement

Open Access

License Rights

DOI

10.1021/acsami.8b09745

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