内建电场影响下应变纤锌矿ZnSnN_(2)/In_(x)Ga_(1-x)N柱形量子点太阳能电池的转换效率  

Conversion Efficiency of Strained Wurtzite ZnSnN_(2)/In_(x)Ga_(1-x)N Cylindrical Quantum Dot Solar Cell Under Influence of Built-in Electric Field

作　　者：陈其扬 石磊[1] 闫祖威[1] CHEN Qi-yang;SHI Lei;YAN Zu-wei(School of Science, Inner Mongolia Agricultural University, Hohhot 010018, China)

机构地区：[1]内蒙古农业大学理学院,内蒙古呼和浩特010018

出　　处：《发光学报》2021年第4期534-541,共8页Chinese Journal of Luminescence

基　　金：内蒙古自治区自然科学基金(2019MS01006,2020MS01008);内蒙古自治区高等学校科学研究项目(NJZY19047)资助。

摘　　要：在有效质量近似下,通过变分理论计算了应变纤锌矿ZnSnN_(2)/In_(x)Ga_(1-x)N柱形量子点的带隙,进而利用细致平衡理论,研究了柱形量子点太阳能电池的转换效率在多重激子效应以及内建电场的影响下随量子点半径、高度和In组分的变化关系。结果表明,量子点太阳能电池的转换效率随着量子点半径、高度以及In组分的增加单调增加。多重激子效应能够明显提高太阳能电池的转换效率,但是内建电场会使得太阳能电池的转换效率明显降低。Within the effective mass approximation,the band gap of strained wurtzite ZnSnN_(2)/In_(x)Ga_(1-x)N cylindrical quantum dot is calculated theoretically by a variational method.Furthermore,based on the detailed balance theory,the relationship between the conversion efficiency of cylindrical quantum dot solar cell and the radius,height and In component of quantum dot under the influence of built-in electric field and multiple exciton generation are studied.The results show that the conversion efficiency of quantum dot solar cell increases monotonously with the increase of quantum dot radius,height and In component.The multiple exciton generation can obviously improve the conversion efficiency of solar cells,but the built-in electric field can reduce the conversion efficiency of solar cells significantly.

关 键 词：柱形量子点 太阳能电池 转换效率 内建电场 多重激子效应 

分 类 号：TM914.4[电气工程—电力电子与电力传动] O471.3[理学—半导体物理]