Enhanced performance of quantum dot solar cells based on type II quantum dots

Enhanced performance of quantum dot solar cells based on type II quantum dots
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基于II型量子点的量子点太阳能电池的增强性能

DOI:
10.1063/1.4895476
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发表时间:
2014-10
影响因子:
3.2
通讯作者:
Tao Yang
Tao Yang
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
Xiao-Guang Yang;Shuai Luo;Zun-Ren Lv;Tao Yang

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从理论上研究了基于第二类量子点的量子点太阳能电池(QDSC)的特性。基于漂移扩散模型,与I型QDSC相比,II型QDSC具有更高的开路电压(VOC)和转换效率。VOC和效率的提高主要归功于第二类量子点具有更长的俄歇复合寿命。此外,还讨论和阐明了载流子寿命对器件性能的影响。此外,还提出了确定量子点在太阳能电池中作用的明确判据。
The characteristics of quantum dot solar cells (QDSCs) based on type II QDs are investigated theoretically. Based on a drift-diffusion model, we obtained a much higher open circuit voltage (Voc) as well as conversion efficiency in a type II QDSC, compared to type I QDSCs. The improved Voc and efficiency are mainly attributed to the much longer Auger recombination lifetime in type II QDs. Moreover, the influence of the carrier lifetime on devices' performance is discussed and clarified. In addition, an explicit criterion to determine the role of quantum dots in solar cells is put forward.
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