Dead Ends Limit Charge Carrier Extraction from All‐Polymer Bulk Heterojunction Solar Cells,Advanced Electronic Materials

当前位置： X-MOL 学术 › Adv. Electron. Mater. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Dead Ends Limit Charge Carrier Extraction from All‐Polymer Bulk Heterojunction Solar Cells
Advanced Electronic Materials ( IF 5.3 ) Pub Date : 2018-06-26 , DOI: 10.1002/aelm.201800144
Rokas Jasiūnas ₁ , Armantas Melianas ₂ , Yuxin Xia ₂ , Nikolaos Felekidis ₃ , Vidmantas Gulbinas ₁ , Martijn Kemerink ₃

Affiliation

Extraction of photocreated charge carriers from a prototypical all‐polymer organic solar cell is investigated by combining transient photocurrent and time‐delayed collection field experiments with numerical simulations. It is found that extraction is significantly hampered by charges getting trapped in spatial traps that are tentatively attributed to dead ends in the intermixed polymer network—in photovoltaic devices based on the same donor polymer and a fullerene acceptor this effect is much weaker. The slow‐down in charge extraction leads to enhanced recombination and associated performance losses. These effects are observed in addition to the dispersive behavior that is characteristic of charge motion in energetically disordered media. Upon annealing the effects of spatial traps diminish, rationalizing the doubling in device power conversion efficiency after annealing.

中文翻译：

从全聚合物本体异质结太阳能电池中提取死角限制电荷载流子

通过将瞬态光电流和带时间延迟的收集场实验与数值模拟相结合，研究了从典型的全聚合物有机太阳能电池中提取光生电荷载流子的过程。已经发现，电荷被困在空间陷阱中的电荷显着阻碍了提取，这些空间陷阱暂时归因于混合聚合物网络中的死角，在基于相同施主聚合物和富勒烯受体的光伏器件中，这种作用要弱得多。电荷提取的放慢导致重组增强和相关的性能损失。除了在能量紊乱的介质中电荷运动所特有的分散行为外，还观察到了这些效应。退火后，空间陷阱的影响减弱，

更新日期：2018-06-26

点击分享查看原文

点击收藏

公开下载

阅读更多本刊新发论文本刊介绍/投稿指南