Analysis of different tunneling mechanisms of InxGa1-xAs/AlGaAs tunnel junction light-emitting transistors

作者：Wu Cheng Han; Wu Chao Hsin

来源：Applied Physics Letters, 2014, 105(17): 171104.

DOI：10.1063/1.4898342

The electrical and optical characteristics of tunnel junction light-emitting transistors (TJLETs) with different indium mole fractions (x = 5% and 2.5%) of the InxGa1-xAs base-collector tunnel junctions have been investigated. Two electron tunneling mechanisms (photon-assisted or direct tunneling) provide additional currents to electrical output and resupply holes back to the base region, resulting in the upward slope of I-V curves and enhanced optical output under forward-active operation. The larger direct tunneling probability and stronger Franz-Keldysh absorption for 5% TJLET lead to higher collector current slope and less optical intensity enhancement when base-collector junction is under reverse-biased.

• 出版日期2014-10-27
• 单位中国科学院电工研究所