Improved performance of quantum dot solar cells by type-II InAs/GaAsSb structure with moderate Sb composition.

Improved performance of quantum dot solar cells by type-II InAs/GaAsSb structure with moderate Sb composition.
复制标题

DOI:
10.1016/j.heliyon.2023.e20005
复制
发表时间:
2023-09
期刊:
影响因子:
4
通讯作者:
Yang, Tao
Yang, Tao
中科院分区:
综合性期刊4区
文献类型:
--
作者:
Wang, Shenglin;Wang, Shuai;Yang, Xiaoguang;Lv, Zunren;Chai, Hongyu;Meng, Lei;Yang, Tao

文献摘要

参考文献

相似文献

我们证明了改进的量子点太阳能电池(QDSC)的性能的II型InAs/GaAsSb结构。在Sb含量为18%的条件下,量子点的发光效率达到17.31%,比I型InAs/InGaAs量子点的发光效率提高了11.25%。这种改善可以归因于72.37%的高填充因子(FF),而后者为63%,因为II型结构有效地抑制了量子点中的载流子复合损失。当Sb组分增加到24%时,FF保持在72.67%的高水平,但效率下降到17%,因为GaAsSb覆盖层中的价带(VB)的升高进一步增强了空穴限制。并且限制降低了外量子效率(EQE)和短路电流密度(Jsc)。这些结果证明了通过II型结构提高QDSC效率的潜力。
We demonstrate improved performance of quantum dot solar cells (QDSCs) by type-II InAs/GaAsSb structure. With a moderate Sb composition of 18% and high quality QDs, a high efficiency of 17.31% under AM1.5 G illumination is achieved, showing an improvement of 11.25% in efficiency relative to type-I InAs/InGaAs QDSC. This improvement can be attributed to a high fill factor (FF) of 72.37% compared to 63% of the latter because the type-II structure effectively suppresses carrier recombination losses in QDs. As Sb composition increases to 24%, the FF maintains at a high level of 72.67%, but the efficiency drops to 17% because the elevation of valence band (VB) in GaAsSb capping layer further enhances the hole confinement. And the confinement reduces external quantum efficiency (EQE) and short-circuit current density (Jsc). These results prove the potential of improving efficiency of QDSCs by type-II structure.
DOI: 10.1016/j.solmat.2012.06.023
发表时间: 2012-10-01
影响因子: 6.9
作者:
Liu, Wei-Sheng;Wu, Hong-Ming;Chyi, Jen-Inn
通讯作者: Chyi, Jen-Inn
DOI: 10.1002/adma.200902388
发表时间: 2010-01-12
期刊: ADVANCED MATERIALS
影响因子: 29.4
作者:
Luque, Antonio;Marti, Antonio
通讯作者: Marti, Antonio
DOI: 10.1063/1.3492836
发表时间: 2010-09-20
影响因子: 4
作者:
Jolley, Greg;Lu, Hao Feng;Jagadish, Chennupati
通讯作者: Jagadish, Chennupati
DOI: 10.1103/physrevlett.97.247701
发表时间: 2006-12-15
影响因子: 8.6
作者:
Marti, A.;Antolin, E.;Luque, A.
通讯作者: Luque, A.
DOI: 10.1039/d2ee02543d
发表时间: 2022-09-27
影响因子: 32.5
作者:
Li, Xingcheng;Wu, Xin;Yang, Shangfeng
通讯作者: Yang, Shangfeng