红外与毫米波学报2023，Vol.42Issue(6)：716-723,8.DOI:10.11972/j.issn.1001-9014.2023.06.002
带间级联红外探测器的光电流输运与量子效率研究
Study on photocurrent transport and quantum efficiency of interband cascade infrared photodetectors
摘要
Abstract
The interband cascade infrared photodetector(ICIP)can achieve high operating temperature by using the mul-tistage cascade absorption region.But different design of absorption region will cause the mismatch of photogenerated carriers,which will affect the quantum efficiency of the device.In order to better understand the influence of the stage and thickness of ICIP on quantum efficiency,we measure the performance of ICIP based on the type-Ⅱ InAs/GaSb super-lattice at different operating temperatures.And based on the"average effect"of photocurrent,a quantum efficiency mod-el operating at reverse bias voltage is established.Compared with the measured results,it is found that the experimental data and the calculated results are in good agreement at low temperatures.It is verified that the photocurrent is the aver-age of current at all stages based on the electrical gain.However,the experimental photocurrent at high temperatures is lower than the calculation.This may be due to the short minority carrier lifetime at high temperatures,and the photogene-rated carrier recombination mechanism exists at the interface of the absorption region and the relaxation region.关键词
InAs/GaSb Ⅱ类超晶格/带间级联探测器/电子增益/量子效率Key words
type-Ⅱ InAs/GaSb superlattice/interband cascade infrared photodetector/electrical gain/quantum efficiency分类
信息技术与安全科学引用本文复制引用
白雪莉,柴旭良,周易,朱艺红,梁钊铭,徐志成,陈建新..带间级联红外探测器的光电流输运与量子效率研究[J].红外与毫米波学报,2023,42(6):716-723,8.基金项目
国家自然科学基金(62222412,61904183),国家重点研发计划(2022YFB3606800),中国科学院青年创新促进会(Y202057),上海市科技启明星计划(21YF1455000) Supported by the National Natural Science Foundation of China(62222412,61904183),the National Key Research and Develop-ment Program of China(2022YFB3606800),the Youth Innovation Promotion Association,CAS(Y202057),Shanghai Rising-Star Program(21YF1455000) （62222412,61904183）
