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完全非化环电子接收器使有效的无添加剂有机太阳能电池具有增强的激发扩散长度

Kun Li¹, Xuefeng Liu¹, Jianbin Zhong²

¹Beijing Key Laboratory for Optical Materials and Photonic Devices, Department of Chemistry, Capital Normal University, Beijing, 100048, P. R. China.

Small (Weinheim an der Bergstrasse, Germany)

|October 31, 2024

概括

新的低成本有机太阳能电池 (OSC) 使用未经添加剂加工的新型非化环电子受体 (NFREA). DTB22接受器实现了17.00%的高功率转换效率 (PCE),同时具有出色的稳定性.

科学领域:

材料科学材料科学材料科学
有机电子有机电子
太阳能光伏发电是如何实现的

背景情况:

大规模的有机太阳能电池 (OSC) 商业化需要低成本的材料和无添加剂的非化溶剂加工.
由于对结构与财产关系的理解有限,具有这些特征的高效性OSC很少.

研究的目的:

为高效的OSCs开发新的,低成本的,完全非化环电子受体 (NFREAs).
调查氧链长度对NFREA特性和OSC性能的影响.
使用无添加剂处理实现高功率转换效率 (PCE).

主要方法:

在1,4-di(thiophen-2-yl) 核上合成三种不同氧链长度的NFREAs (DTB21,DTB22,DTB23).
使用与聚合物供体PBQx-TF混合的NFREAs制造OSC,从没有添加剂的烯中加工.
材料属性的表征,包括刺激子扩散长度 (L_D) 和装置性能 (PCE,稳定性).

主要成果:

每克NFREA的价格为11-13美元.
DTB22表现出最长的激子扩散长度 (25.5 nm),最快的孔转移和最长的载体重组寿命.
最优的PBQx-TF:DTB22 OSC获得了17.00%的PCE,PBQx-TF:DTB21和PBQx-TF:DTB23分别产生了15.13%和15.63%.
在没有封装500小时后,基于DTB22的OSC保持了95%的初始效率.

结论:

开发的NFREA为高效的OSC提供了低成本的解决方案.
DTB22表现出卓越的性能和稳定性,使其成为OSC应用的有希望的材料.
无添加剂,非化溶剂加工对于高性能OSC制造是可行的.

关键词:

它们是NFREAs.没有添加剂的无添加剂.激发的扩散长度是激发的扩散长度低成本的低成本的成本.其他非素溶剂溶剂.

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