Dye-Incorporated Polynaphthalenediimide Acceptor for Additive-Free High-Performance All-Polymer Solar Cells
Dye-Incorporated Polynaphthalenediimide Acceptor for Additive-Free High-Performance All-Polymer Solar Cells
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用于无添加剂高性能全聚合物太阳能电池的掺入染料的聚萘二亚胺受体
DOI：
10.1002/anie.201800035
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发表时间：
2018-04-16
影响因子：
16.6
通讯作者：
Li, Yongfang
中科院分区：
文献类型：
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作者：
Chen, Dong;Yao, Jia;Li, Yongfang
全聚合物太阳能电池（all-PSCs）在柔性器件中具有独特的应用优势，而基于萘二亚胺（NDI）的聚合物受体是目前应用最为广泛的聚合物受体。然而，由于低光吸收、次优能级和基于ndi的聚合物受体的强聚集，它们的功率转换效率（PCE）仍然落后于最先进的聚合物太阳能电池。通过简单无规共聚将罗丹宁基染料分子引入到ndi基聚合物受体中，其光吸收系数提高，最低未占据分子轨道水平上移，结晶化程度降低。因此，无添加剂全pscs的PCE高达8.13%，这是迄今为止报道的全pscs的最高性能特征之一。这些结果表明，将染料加入到n型聚合物中，可以深入了解全pscs高性能聚合物受体的精确设计。
All-polymer solar cells (all-PSCs) can offer unique advantages for applications in flexible devices, and naphthalene diimide (NDI)-based polymer acceptors are the widely used polymer acceptors. However, their power conversion efficiency (PCE) still lags behind that of state-of-the-art polymer solar cells, due to low light absorption, suboptimal energy levels and the strong aggregation of the NDI-based polymer acceptor. Herein, a rhodanine-based dye molecule was introduced into the NDI-based polymer acceptor by simple random copolymerization and showed an improved light absorption coefficient, an up-shifted lowest unoccupied molecular orbital level and reduced crystallization. Consequently, additive-free all-PSCs demonstrated a high PCE of 8.13%, which is one of the highest performance characteristics reported for all-PSCs to date. These results indicate that incorporating a dye into the n-type polymer gives insight into the precise design of high-performance polymer acceptors for all-PSCs.