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All‐Polymer Solar Cells Based on a Conjugated Polymer Containing Siloxane‐Functionalized Side Chains with Efficiency over 10%
Advanced Materials ( IF 29.4 ) Pub Date : 2017-11-07 , DOI: 10.1002/adma.201703906
Baobing Fan 1 , Lei Ying 1 , Peng Zhu 1 , Feilong Pan 1 , Feng Liu 2 , Junwu Chen 1 , Fei Huang 1 , Yong Cao 1
Affiliation  

A novel wide‐bandgap conjugated copolymer based on an imide‐functionalized benzotriazole building block containing a siloxane‐terminated side‐chain is developed. This copolymer is successfully used to fabricate highly efficient all‐polymer solar cells (all‐PSCs) processed at room temperature with the green‐solvent 2‐methyl‐tetrahydrofuran. When paired with a naphthalene diimide‐based polymer electron‐acceptor, the all‐PSC exhibits a maximum power conversion efficiency (PCE) of 10.1%, which is the highest value so far reported for an all‐PSC. Of particular interest is that the PCE remains 9.4% after thermal annealing at 80 °C for 24 h. The resulting high efficiency is attributed to a combination of high and balanced bulky charge carrier mobility, favorable face‐on orientation, and high crystallinity. These observations indicate that the resulting copolymer can be a promising candidate toward high‐performance all‐PSCs for practical applications.

中文翻译:

基于包含硅氧烷功能化侧链的共轭聚合物的全聚合物太阳能电池,效率超过10%

基于含硅氧烷末端侧链的酰亚胺官能化苯并三唑结构单元,开发了一种新型的宽带隙共轭共聚物。该共聚物已成功用于制造在室温下用绿色溶剂2-甲基-四氢呋喃加工的高效全聚合物太阳能电池(all-PSC)。与基于萘二酰亚胺的聚合物电子受体配对时,全PSC的最大功率转换效率(PCE)为10.1%,这是迄今为止所有全PSC的最高值。特别令人感兴趣的是,在80°C下进行24小时的热退火后,PCE仍为9.4%。所产生的高效率归因于高且平衡的大体积电荷载流子迁移率,良好的面朝取向和高结晶度的结合。
更新日期:2017-11-07
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