Dye‐Incorporated Polynaphthalenediimide Acceptor for Additive‐Free High‐Performance All‐Polymer Solar Cells,Angewandte Chemie International Edition

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Dye‐Incorporated Polynaphthalenediimide Acceptor for Additive‐Free High‐Performance All‐Polymer Solar Cells
Angewandte Chemie International Edition ( IF 16.1 ) Pub Date : 2018-03-13 , DOI: 10.1002/anie.201800035
Dong Chen _{1,

2} , Jia Yao _{3,

4} , Lie Chen _{1,

2} , Jingping Yin ₁ , Ruizhi Lv ₁ , Bin Huang ₁ , Siqi Liu ₁ , Zhi-Guo Zhang ₃ , Chunhe Yang ₄ , Yiwang Chen _{1,

2} , Yongfang Li ₃

Affiliation

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.

中文翻译：

掺染料的聚萘二酰亚胺受体，用于无添加剂高性能全聚合物太阳能电池

全聚合物太阳能电池（all-PSC）可以为柔性设备中的应用提供独特的优势，基于萘二酰亚胺（NDI）的聚合物受体是被广泛使用的聚合物受体。但是，由于光吸收低，能量水平欠佳以及基于NDI的聚合物受体的强聚集性，它们的功率转换效率（PCE）仍然落后于最新的聚合物太阳能电池。在此，通过简单的随机共聚将基于罗丹宁的染料分子引入到基于NDI的聚合物受体中，并显示出提高的光吸收系数，上移的最低未占据分子轨道水平和降低的结晶度。因此，不含添加剂的全PSC表现出了8.13％的高PCE，这是迄今为止所报道的全PSC的最高性能特征之一。

更新日期：2018-03-13

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