通过原子定位来控制2D外侧链的合规锁定控制,以提高有机太阳能电池的热稳定性
Sangjin Yang1, Jaeyeong Park1, Seonghun Jeong1
1School of Energy and Chemical Engineering, Perovtronics Research Center, Low Dimensional Carbon Materials Center, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Ulju-gun, Ulsan 44919, South Korea.
ACS applied materials & interfaces
|August 14, 2023
概括
研究人员为有机太阳能电池 (OSC) 开发了新的非富勒林受体 (NFAs). 战略性地将放在侧链中,增强了分子包装,提高了设备的功率转换效率 (PCE) 和热稳定性.
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:
- 有机太阳能电池 (OSC) 的商业化需要高功率转换效率 (PCE) 和提高设备稳定性,特别是热稳定性.
- 非富勒烯受体 (NFAs) 是OSC的关键组成部分,它们的侧链工程显著影响分子包装和热稳定性.
研究的目的:
- 在2D外侧链上合成和研究两种新的异构NFA,在2D外侧链上具有不同的替代.
- 评估侧链形状和二极极矩对NFAs分子包装,晶体性和热稳定性的影响.
- 评估采用这些新型NFA的OSC的光伏性能和运行稳定性.
主要方法:
- 合成两个异构NFA (4FY和2FY),在六烯侧链上具有不同的位置.
- 热和形态表征 (例如,DSC,XRD,AFM) 来分析结晶性和分子包装.
- 在加速老化条件下测量PCE和热稳定性的OSC设备的制造和表征.
主要成果:
- 与2FY的水平形状相比,4FY呈现了对角侧链形状和更高的二极极矩.
- 4FY表现出更高的结晶度和更密集的分子包装在整洁的片中.
- 基于4FY的OSC实现了16.4%的PCE,并在85°C时360小时后保持了88.4%的初始PCE.
结论:
- 在二维外侧链上的定位对于控制NFA构成和增强分子包装至关重要.
- 4FY NFA的优越结晶性和与捐赠材料的兼容性导致了光伏性能的提高和OSC的优异热稳定性.
- 战略侧链工程为下一代有机太阳能电池开发高效和稳定的NFA提供了可行的途径.
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