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异构对高性能非富勒烯电子受体的影响

Jiayu Wang¹, Junxiang Zhang², Yiqun Xiao³

¹Department of Materials Science and Engineering, College of Engineering, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education , Peking University , Beijing 100871 , China.

Journal of the American Chemical Society

|July 4, 2018

概括

合成了两个同位体的化环电子受体,FNIC1和FNIC2. 与FNIC1相比,基于FNIC2的有机太阳能电池实现了更高的功率转换效率 (PCE),提高了性能.

科学领域:

材料科学
有机电子
太阳能发电

背景情况:

有机太阳能电池 (OSC) 需要高效的电子受体来实现高性能.
异构分子设计提供了一种调整电子和光学属性的策略.
化环系统对于开发先进的电子受体材料至关重要.

研究的目的:

设计和合成新的同位素化环电子受体,FNIC1和FNIC2.
调查异构体之间的结构属性关系.
评估它们在有机太阳能电池应用中的性能.

主要方法:

合成两个同质的化九环电子受体 (FNIC1和FNIC2).
电子,光学,电荷传输和形态特性.
使用PTB7-Th:FNIC1和PTB7-Th:FNIC2混合物的有机太阳能电池的制造和测试.

主要成果:

与FNIC1相比,FNIC2表现出红移吸收,更高的电子亲和力,更低的电离能,以及更强的电子流动性.
基于PTB7-Th:FNIC2的有机太阳能电池实现了13.0%的功率转换效率 (PCE),超过了基于FNIC1的设备 (10.3%).
与FNIC1相比,使用FNIC2的半透明设备在各种平均可见透射率 (AVT) 中显示出更高的PCE.

结论:

融合环电子受体的异构变化对其性能和设备性能产生重大影响.
FNIC2是高效的有机太阳能电池的一个有前途的电子受体材料.
这项研究强调了异构工程在发展有机光伏技术方面的潜力.

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