Enhanced Performance of a Self-Powered Organic/Inorganic Photodetector by Pyro-Phototronic and Piezo-Phototronic Effects

Peng, Wenbo; Wang, Xingfu; Yu, Ruomeng; Dai, Yejing; Zou, Haiyang; Wang, Aurelia C.; He, Yongning; Wang, Zhong Lin

doi:10.1002/adma.201606698

Title: Enhanced Performance of a Self-Powered Organic/Inorganic Photodetector by Pyro-Phototronic and Piezo-Phototronic Effects

Journal Article · Tue Apr 11 00:00:00 EDT 2017 · Advanced Materials

DOI:https://doi.org/10.1002/adma.201606698· OSTI ID:1533037

Peng, Wenbo ^[1]; Wang, Xingfu ^[2]; Yu, Ruomeng ^[2]; Dai, Yejing ^[2]; Zou, Haiyang ^[2]; Wang, Aurelia C. ^[2]; He, Yongning ^[3]; Wang, Zhong Lin ^[4]

Xi'an Jiaotong Univ. (China). School of Electronic and Information Engineering; Georgia Inst. of Technology, Atlanta, GA (United States). School of Materials Science and Engineering
Georgia Inst. of Technology, Atlanta, GA (United States). School of Materials Science and Engineering
Xi'an Jiaotong Univ. (China). School of Electronic and Information Engineering
Georgia Inst. of Technology, Atlanta, GA (United States). School of Materials Science and Engineering; Chinese Academy of Sciences (CAS), Beijing (China). Beijing Inst. of Nanoenergy and Nanosystems

Self‐powered photodetectors (PDs) have long been realized by utilizing photovoltaic effect and their performances can be effectively enhanced by introducing the piezo‐phototronic effect. Recently, a novel pyro‐phototronic effect is invented as an alternative approach for performance enhancement of self‐powered PDs. Here, a self‐powered organic/inorganic PD is demonstrated and the influences of externally applied strain on the pyro‐phototronic and the photovoltaic effects are thoroughly investigated. Under 325 nm 2.30 mW cm ^‐2 UV illumination and at a ‐0.45% compressive strain, the PD's photocurrent is dramatically enhanced from ≈14.5 to ≈103 nA by combining the pyro‐phototronic and piezo‐phototronic effects together, showing a significant improvement of over 600%. Theoretical simulations have been carried out via the finite element method to propose the underlying working mechanism. Moreover, the pyro‐phototronic effect can be introduced by applying a ‐0.45% compressive strain to greatly enhance the PD's response to 442 nm illumination, including photocurrent, rise time, and fall time. This work provides in‐depth understandings about the pyro‐phototronic and the piezo‐phototronic effects on the performances of self‐powered PD to light sources with different wavelengths and indicates huge potential of these two effects in optoelectronic devices.

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Research Organization:: Georgia Institute of Technology, Atlanta, GA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: FG02-07ER46394; DEFG02‐07ER46394

OSTI ID:: 1533037

Alternate ID(s):: OSTI ID: 1401778

Journal Information:: Advanced Materials, Vol. 29, Issue 23; ISSN 0935-9648

Publisher:: WileyCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 128 works

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