All-Polymer Solar Cells Based on a Conjugated Polymer Containing Siloxane-Functionalized Side Chains with Efficiency over 10%
All-Polymer Solar Cells Based on a Conjugated Polymer Containing Siloxane-Functionalized Side Chains with Efficiency over 10%
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全聚合物%20Solar%20Cells%20Based%20on%20a%20共轭%20聚合物%20含%20硅氧烷官能化%20Side%20Chains%20with%20效率%20over%2010%
DOI：
10.1002/adma.201703906
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发表时间：
2017-12-20
影响因子：
29.4
通讯作者：
Cao, Yong
中科院分区：
文献类型：
--
作者：
Fan, Baobing;Ying, Lei;Cao, Yong
开发了一种新型的宽禁带共轭共聚物，该共聚物是基于一种含正戊烷侧链的酰亚胺功能化苯并三氮唑结构单元。该共聚物被成功地用于制备高效的全聚合物太阳能电池（全PSC）在室温下处理的绿色溶剂2-甲基-四氢呋喃。当与基于萘二酰亚胺的聚合物电子受体配对时，全PSC表现出10.1%的最大功率转换效率（PCE），这是迄今为止报道的全PSC的最高值。特别令人感兴趣的是，PCE在80摄氏度下热退火24小时后保持9.4%。所得的高效率归因于高且平衡的大体积电荷载流子迁移率、有利的正面取向和高结晶度的组合。这些观察结果表明，所得共聚物可以是一个有前途的候选人向高性能的全PSC的实际应用。
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 degrees 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.