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具有不对称的骨干的自组合分子用于高度稳定的二进制有机太阳能电池,效率为19.7%

Xueliang Yu^1,2, Pengfei Ding^1,3, Daobin Yang^1,3

¹Zhejiang Engineering Research Center for Energy Optoelectronic Materials and Devices, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, China.

Angewandte Chemie (International ed. in English)

|March 9, 2024

概括

新的孔输送分子 (HTM) 显著提高有机太阳能电池 (OSC) 的效率和稳定性. 基于BrBACz的设备实现了创纪录的19.70%的效率,并保持了超过1000小时的性能.

科学领域:

材料科学材料科学材料科学
有机电子有机电子
可再生能源可再生能源是可再生能源.

背景情况:

聚3,4-乙烯二氧化) 聚乙烯硫酸盐 (PEDOT:PSS) 是有机太阳能电池 (OSC) 中常见的孔输送材料 (HTM).
PEDOT:PSS由于酸度和高度而缺乏稳定性,其能量水平限制了设备的性能.
它的红外吸收和高最高占有分子轨道 (HOMO) 能量水平阻碍了短路电流密度 (Jsc) 和开路电压 (Voc) 的增强.

研究的目的:

设计和合成新的非对称自组合分子 (SAM),作为OSCs的替代HTM.
为了解决 PEDOT:PSS 在稳定性和性能方面的局限性.
为了改善光子采集,最大限度地减少电压损失,并增强二进制OSC中的电荷提取/传输.

主要方法:

合成两个不对称的SAM:BrCz和BrBACz.
在使用PM6:Y6,PM6:eC9,PM6:L8-BO和D18:eC9系统的二进制OSC中将BrBACz作为HTM的纳入.
描述SAM属性 (双极矩,工作函数,表面能量) 和设备性能 (效率,Jsc,Voc).

主要成果:

与BrCz相比,BrBACz表现出更大的二极子时刻,更深的工作功能和更低的表面能量.
基于PM6:eC9的二元OSC与BrBACz实现了冠军功率转换效率 (PCE) 的19.70%.
基于BrBACz的装置显示了高Jsc 29.20 mA cm-2和Voc 0.856 V,在环境空气中1000小时后95%的效率保持.

结论:

BrBACz是二进制OSC的高效HTM,超过了PEDOT:PSS.的性能和稳定性.
开发的SAMS为创造稳定和高效的有机太阳能电池提供了一个有希望的途径.
创纪录的效率和长期稳定性凸显了BrBACz在有机光伏中商业应用的潜力.

关键词:

不对称的骨架骨架不对称的的效率和稳定性.孔运输材料的运输材料.有机太阳能电池是有机太阳能电池.自己组装的单层单层.

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