Charge Carrier Extraction in Organic Solar Cells Governed by Steady-State Mobilities
Charge Carrier Extraction in Organic Solar Cells Governed by Steady-State Mobilities
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DOI：
10.1002/aenm.201701138
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发表时间：
2017-11-22
影响因子：
27.8
通讯作者：
Koster, L. Jan Anton
中科院分区：
文献类型：
--
作者：
Le Corre, Vincent M.;Chatri, Azadeh Rahimi;Koster, L. Jan Anton
有机光伏（OPV）器件中的电荷输运通常以稳态迁移率为特征。然而，稳态迁移率描述电荷输运的适用性最近受到质疑，并且有人认为色散起着重要作用。本文研究了载流子运动色散对有机光伏器件性能的影响。建立了在实际操作条件下测量电荷提取时间的实验。该实验应用于不同的共混物，结果表明萃取时间与稳态迁移率的几何平均值直接相关。这表明，在实际操作条件下，稳态迁移率控制着OPV的电荷提取，并为器件性能提供了有价值的见解。
Charge transport in organic photovoltaic (OPV) devices is often characterized by steady-state mobilities. However, the suitability of steady-state mobilities to describe charge transport has recently been called into question, and it has been argued that dispersion plays a significant role. In this paper, the importance of the dispersion of charge carrier motion on the performance of organic photovoltaic devices is investigated. An experiment to measure the charge extraction time under realistic operating conditions is set up. This experiment is applied to different blends and shows that extraction time is directly related to the geometrical average of the steady-state mobilities. This demonstrates that under realistic operating conditions the steady-state mobilities govern the charge extraction of OPV and gives a valuable insight in device performance.