Bifunctional Bis‐benzophenone as A Solid Additive for Non‐Fullerene Solar Cells,Advanced Functional Materials

当前位置： X-MOL 学术 › Adv. Funct. Mater. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Bifunctional Bis‐benzophenone as A Solid Additive for Non‐Fullerene Solar Cells
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2020-11-25 , DOI: 10.1002/adfm.202008699
Pu Fan _{1,

2} , Wenjian Sun ₃ , Xiaohua Zhang ₁ , Yao Wu ₂ , Qin Hu _{2,

4,

5} , Qing Zhang ₃ , Junsheng Yu ₁ , Thomas P. Russell _{2,

5}

Affiliation

Simultaneously improving efficiency and stability is critical for the commercial application of non‐fullerene acceptor polymer solar cells (NFA‐PSCs). Multifunctional solid additives have been considered as a potential route to tune the morphology of the active layer and optimize performance. In this work, photoinitiator bifunctional bis‐benzophenone (BP‐BP) is used as a solid additive, replacing solvent additives, in the PBDB‐T:ITIC NFA system. With the addition of BP‐BP, the intermolecular π–π stacking of PBDB‐T and morphology is improved, leading to more balanced carrier transport and more effective exciton dissociation. Devices fabricated with BP‐BP show a power conversion efficiency (PCE) of 11.89%, with enhanced short‐circuit current (J_sc), and fill factor (FF). Devices optimized with BP‐BP show excellent reproducibility, insensitivity to thickness, and an improved thermal stability under atmospheric conditions without encapsulation. This work provides a new strategy for the application of solid additives in NFA‐PSCs.

中文翻译：

双功能双二苯甲酮作为非富勒烯太阳能电池的固体添加剂

同时提高效率和稳定性对于非富勒烯受体聚合物太阳能电池（NFA-PSC）的商业应用至关重要。多功能固体添加剂被认为是调节活性层形态和优化性能的潜在途径。在这项工作中，PBDB-T：ITIC NFA系统将光引发剂双官能双苯甲酮（BP-BP）用作固体添加剂，代替了溶剂添加剂。通过添加BP‐BP，改善了PBDB‐T分子间π–π堆积和形态，从而导致更加平衡的载流子传输和更有效的激子离解。用BP‐BP制成的器件显示出11.89％的功率转换效率（PCE），并具有增强的短路电流（J _sc）和填充因子（FF）。使用BP‐BP优化的设备显示出出色的可重复性，对厚度不敏感，并且在大气条件下无需封装即可提高热稳定性。这项工作为在NFA-PSC中应用固体添加剂提供了新的策略。

更新日期：2020-11-25

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11