Simple Tricyclic-Based A-π-D-π-A-Type Nonfullerene Acceptors for High-Efficiency Organic Solar Cells,ACS Applied Materials & Interfaces

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Simple Tricyclic-Based A-π-D-π-A-Type Nonfullerene Acceptors for High-Efficiency Organic Solar Cells
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2022-01-21 , DOI: 10.1021/acsami.1c22520
Yuanyuan Zhou _{1,

2} , Miao Li ₁ , Na Yu ₃ , Shuaishuai Shen ₂ , Jinsheng Song ₂ , Zaifei Ma ₃ , Zhishan Bo ₁

Affiliation

Nonfused-ring electron acceptors have attracted much attention in recent years due to their advantages of simple synthetic routes, high yields, low costs, reasonable power conversion efficiencies (PCEs), and so on. Herein, three simple A-π-D-π-A-type acceptors (DTC-BO-4F, DTS-BO-4F, and DTP-BO-4F) comprising a tricyclic fused-ring core, two 2,5-bis(alkyloxy)phenylene spacers, and two difluorinated terminal groups (DF-IC) were developed. Compared with DTS-BO-4F, DTC-BO-4F and DTP-BO-4F exhibit higher molar extinction coefficients, stronger crystallinity, and more orderly stacking. The PBDB-T:DTC-BO-4F-based blend film shows suitable phase separation and higher and more balanced charge mobilities. Finally, the photovoltaic devices based on DTC-BO-4F give an outstanding PCE of 13.26% with a small nonradiative voltage loss of 0.23 eV.

中文翻译：

用于高效有机太阳能电池的简单三环基 A-π-D-π-A 型非富勒烯受体

近年来，非稠环电子受体由于具有合成路线简单、收率高、成本低、功率转换效率（PCEs）合理等优点而备受关注。在此，三个简单的 A-π-D-π-A 型受体（DTC-BO-4F、DTS-BO-4F和DTP-BO-4F）包括一个三环稠环核心、两个 2,5-双（烷氧基）亚苯基间隔物和两个二氟末端基团（DF-IC）被开发出来。与DTS-BO-4F相比，DTC-BO-4F和DTP-BO-4F具有更高的摩尔消光系数、更强的结晶度和更有序的堆积。PBDB-T：DTC-BO-4F基共混膜显示出合适的相分离和更高和更平衡的电荷迁移率。最后，基于DTC-BO-4F的光伏器件具有 13.26% 的出色 PCE 和 0.23 eV 的小非辐射电压损耗。

更新日期：2022-02-02

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