Temperature Dependence of the Piezotronic and Piezophototronic Effects in a-axis GaN Nanobelts.

Wang, Xingfu; Yu, Ruomeng; Peng, Wenbo; Wu, Wenzhuo; Li, Shuti; Wang, Zhong Lin · Adv Mater · 2015

basic_science · Level V

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Abstract

The temperature dependence of the piezotronic and piezophototronic effects in a-axis GaN nanobelts from 77 to 300 K is investigated. The piezotronic effect is enhanced by over 440% under lower temp-eratures. Two independent processes are discovered to form a competing mechanism through the investigation of the temperature dependence of the piezophototronic effect in a-axis GaN nanobelts.