Theoretical study of piezo-phototronic nano-LEDs
Ying Liu1, Simiao Niu, Qing Yang
1School of Material Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia, 30332-0245, USA.
Abstract:
Two-dimensional finite-element simulation of the piezo-phototronic effect in p-n-junction-based devices is carried out for the first time. A charge channel can be induced at the p-n junction interface when strain is applied, given the n-side is a piezoelectric semiconductor and the p-type side is non-piezoelectric semiconductor. This provides the first simulated evidence supporting the previously suggested mechanism responsible for the experimentally observed gigantic change of light-emission efficiency in piezo-phototronic light-emitting devices.
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