中国物理B ›› 2014, Vol. 23 ›› Issue (6): 68801-068801.doi: 10.1088/1674-1056/23/6/068801
• INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY • 上一篇 下一篇
杨静a, 赵德刚a, 江德生a, 刘宗顺a, 陈平a, 李亮a, 吴亮亮a, 乐伶聪a, 李晓静a, 何晓光b, 王辉b, 朱建军b, 张书明b, 张宝顺b, 杨辉a b
Yang Jing (杨静)a, Zhao De-Gang (赵德刚)a, Jiang De-Sheng (江德生)a, Liu Zong-Shun (刘宗顺)a, Chen Ping (陈平)a, Li Liang (李亮)a, Wu Liang-Liang (吴亮亮)a, Le Ling-Cong (乐伶聪)a, Li Xiao-Jing (李晓静)a, He Xiao-Guang (何晓光)b, Wang Hui (王辉)b, Zhu Jian-Jun (朱建军)b, Zhang Shu-Ming (张书明)b, Zhang Bao-Shun (张宝顺)b, Yang Hui (杨辉)a b
摘要: Effects of polarization and p-type GaN resistivity on the spectral response of InGaN/GaN multiple quantum well (MQW) solar cells are investigated. It is found that due to the reduction of piezoelectric polarization and the enhancement of tunneling transport of photo-generated carriers in MQWs, the external quantum efficiency (EQE) of the solar cells increases in a low energy spectral range (λ >370 nm) when the barrier thickness value decreases from 15 nm to 7.5 nm. But the EQE decreases abruptly when the barrier thickness value decreases down to 3.75 nm. The reasons for these experimental results are analyzed. We are aware that the reduction of depletion width in MQW region, caused by the high resistivity of the p-type GaN layer may be the main reason for the abnormally low EQE value at long wavelengths (λ >370 nm).
中图分类号: (Efficiency and performance of solar cells)