A Highly Efficient Non-Fullerene Organic Solar Cell with a Fill Factor over 0.80 Enabled by a Fine-Tuned Hole-Transporting Layer
A Highly Efficient Non-Fullerene Organic Solar Cell with a Fill Factor over 0.80 Enabled by a Fine-Tuned Hole-Transporting Layer
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通过微调空穴传输层实现填充因子超过 0.80 的高效非富勒烯有机太阳能电池
DOI：
10.1002/adma.201801801
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发表时间：
2018
影响因子：
29.4
通讯作者：
Zhou Huiqiong
中科院分区：
文献类型：
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作者：
Zheng Zhong;Hu Qin;Zhang Shaoqing;Zhang Dongyang;Wang Jianqiu;Xie Shenkun;Wang Rong;Qin Yunpeng;Li Wanning;Hong Ling;Liang Ningning;Liu Feng;Zhang Yuan;Wei Zhixiang;Tang Zhiyong;Russell Thomas P.;Hou Jianhui;Zhou Huiqiong
有机太阳能电池（Organic Solar Cells，OSCs）经过几十年的快速发展，以其潜在的实际应用价值而备受关注。作为一个重要的光伏参数，填充因子（FF）的OSC代表的有效性的电荷产生和收集，这在很大程度上取决于中间层和活性层的性质。在这里，展示了通过空穴传输层（HTL）改性来改善FF的简单有效的策略。通过将WOx纳米颗粒与聚（3，4-乙撑二氧噻吩）：聚苯乙烯磺酸盐（PEDOT：PSS）乳液混合，提高了HTL的表面自由能，并优化了活性层的形态。受益于增加的载流子寿命，基于WOx：PEDOT：PSS HTL的器件表现出提升的性能，FF为80.79%，功率转换效率为14.57%PCE。结果由国家计量研究所（NIM）认证，迄今为止，这是该领域认证的最高值。这项工作提供了一个简单可行的HTL改性方案，以实现高效的OSC。
With rapid development for tens of years, organic solar cells (OSCs) have attracted much attention for their potential in practical applications. As an important photovoltaic parameter, the fill factor (FF) of OSCs stands for the effectiveness of charge generation and collection, which significantly depends on the properties of the interlayer and active layer. Here, a facile and effective strategy to improve the FF through hole‐transporting layer (HTL) modification is demonstrated. By mixing WOxnanoparticles with a poly(3,4‐ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS) emulsion, the surface free energy of the HTL is improved and the morphology of the active layer is optimized. Benefiting from increased carrier lifetime, a device based on WOx:PEDOT:PSS HTL exhibits a boosted performance with an FF of 80.79% and power conversion efficiency of 14.57% PCE. The results are certified by the National Institute of Metrology (NIM), which, to date, are the highest values in this field with certification. This work offers a simple and viable option of HTL modification to realize highly efficient OSCs.