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Rationally designed piezoelectric charge polarity at interfaces for largely improving photodiode performance by piezo-phototronic effects

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Abstract

The piezo-phototronic effect is a three-way coupling effect among optical, electrical and mechanical properties of piezoelectric semiconductor (piezo-semi) materials. Although both positive and negative piezoelectric charges (piezo-charges) appear at either end of the piezo-semi material when it is stretched or compressed along a certain direction, only one type/polarity of piezo-charges is investigated and only a single layer of the piezo-semi material is utilized in many of the relevant studies. In this work, not only significant photoresponse improvements by the piezo-phototronic effect are experimentally achieved, but also the coupling effects of positive and negative piezo-charges at the collective interface of two piezo-semi materials are systematically studied. The promising results indicate that: (1) the net quantity and the polarity of piezo-charges can be rationally designed by carefully choosing the neighboring piezo-semi materials, and (2) the multi-layer device structure is a very feasible method to achieve high photoresponse performances especially with the help of the piezo-phototronic effect.

Graphical abstract: Rationally designed piezoelectric charge polarity at interfaces for largely improving photodiode performance by piezo-phototronic effects

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Article information


Submitted
10 Aug 2020
Accepted
06 Oct 2020
First published
08 Oct 2020

J. Mater. Chem. C, 2020, Advance Article
Article type
Paper

Rationally designed piezoelectric charge polarity at interfaces for largely improving photodiode performance by piezo-phototronic effects

F. Li, W. Peng, Z. Pan and Y. He, J. Mater. Chem. C, 2020, Advance Article , DOI: 10.1039/D0TC03802D

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