有机光伏的高性能电子接收器与烯侧链
Yuze Lin1,2,3, Fuwen Zhao3, Qiao He1
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
|March 26, 2016
概括
我们开发了一种新的电子受体ITIC-Th,用于有机太阳能电池. 这种材料实现了9.6%的功率转换效率,与基于烯的接受器相竞争.
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) 由于其灵活性和低成本制造潜力,为传统的基于的光伏提供了有希望的替代品.
- 开发高效的非富勒因受体对于提高OSC性能至关重要.
- 现有的接收器在能级调整和充电传输特性方面往往面临限制.
研究的目的:
- 为高性能有机太阳能电池设计和合成一种新的化环电子接受器ITIC-Th.
- 研究烯侧链对接受器电子特性和性能的影响.
- 用ITIC-Th与不同聚合物供体一起制造的OSC的效率.
主要方法:
- ITIC-Th化环电子接受器的合成.
- 描述ITIC-Th的电子特性 (HOMO/LUMO能量水平) 和电子移动性.
- 使用ITIC-Th与窄带间隙和宽带间隙聚合物供体混合的有机太阳能电池的制造.
- 制造的OSC的性能评估,包括功率转换效率 (PCE).
主要成果:
- 与其替代对应物 (ITIC) 相比,ITIC-Th的能量水平较低 (HOMO = -5.66 eV,LUMO = -3.93 eV).
- 乙侧链诱导 σ 诱导效应,使得能量水平与聚合物供体更好地对齐.
- 与ITIC (2.6 × 10−4 cm2 V−1 s−1) 相比,ITIC-Th的电子流动性显著更高 (6.1 × 10−4 cm2 V−1 s−1).
- 使用ITIC-Th制造的OSC实现了9.6%的功率转换效率.
结论:
- ITIC-Th是有机太阳能电池的高效化环电子接受器.
- 采用二烯侧链的设计增强了电子的移动性,并促进了能量水平的匹配.
- 实现的9.6%的效率突显了ITIC-Th作为高性能非富勒接受器的潜力,与基于富勒的系统具有竞争力.
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