TY  - JOUR
AU  - Wu, Ming
AU  - Jiang, Zhizheng
AU  - Lou, Xiaojie
AU  - Zhang, Fan
AU  - Song, Dongsheng
AU  - Ning, Shoucong
AU  - Guo, Mengyao
AU  - Pennycook, Stephen J.
AU  - Dai, Ji-yan
AU  - Wen, Zheng
TI  - Flexoelectric Thin-Film Photodetectors
JO  - Nano letters
VL  - 21
IS  - 7
SN  - 1530-6984
CY  - Washington, DC
PB  - ACS Publ.
M1  - FZJ-2022-00260
SP  - 2946 - 2952
PY  - 2021
AB  - The flexoelectric effect, which manifests itself as a strain-gradient-induced electrical polarization, has triggered great interest due to its ubiquitous existence in crystalline materials without the limitation of lattice symmetry. Here, we propose a flexoelectric photodetector based on a thin-film heterostructure. This prototypical device is demonstrated by epitaxial LaFeO3 thin films grown on LaAlO3 substrates. A giant strain gradient of the order of 106/m is achieved in LaFeO3 thin films, giving rise to an obvious flexoelectric polarization and generating a significant photovoltaic effect in the LaFeO3-based heterostructures with nanosecond response under light illumination. This work not only demonstrates a novel self-powered photodetector different from the traditional interface-type structures, such as the p–n and Schottky junctions but also opens an avenue to design practical flexoelectric devices for nanoelectronics applications.
LB  - PUB:(DE-HGF)16
C6  - pmid:33759536
UR  - <Go to ISI:>//WOS:000641160500034
DO  - DOI:10.1021/acs.nanolett.1c00055
UR  - https://juser.fz-juelich.de/record/904946
ER  -