Li Desheng, Chen Kai, Li Shaojian, Ling Haiqian, Duan Weixu, Lin Zedong, Wu Fan, Xiao Lei, Liu Cong, Liu Tao, Zhou Liwei, Guo Xiangwen, Zou Bingsuo
State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, MOE Key Laboratory of New Processing Technology for Nonferrous Metals and Materials, School of Resources, Environment and Materials, Guangxi University, Nanning, 530004, China.
School of Materials Science and Engineering, Taizhou University, Taizhou, 318000, China.
Small. 2025 May;21(19):e2500390. doi: 10.1002/smll.202500390. Epub 2025 Apr 4.
Carbazole-based self-assembled small molecules are promising and commonly used hole transport layers (HTLs) materials for inverted perovskite solar cells (IPSCs). Here, a novel perdeuterated carbazole-based SAM named 4PACzd8 is obtained. Owing to the deuteration strategy, which causes a reduction in molecular vibration frequency, 4PACzd8 modulates the perovskite crystallization atop and suppresses interfacial non-radiative recombination. Furthermore, it is noteworthy that 4PACzd8 demonstrates heightened UV absorption properties, thereby offering enhanced protection to the underlying perovskite film from degradation resulting from UV exposure. Compared with the non-deuterated analog 4PACz, the champion device employing 4PACzd8 showed a higher power conversion efficiency (PCE) of 24.87% and excellent stability. The impressive PCE of 24.87% is by far one of the highest values for IPSCs with simple carbazole-based SAMs as HTLs.
咔唑基自组装小分子是用于倒置钙钛矿太阳能电池（IPSCs）的很有前景且常用的空穴传输层（HTLs）材料。在此，获得了一种名为4PACzd8的新型全氘代咔唑基自组装单分子膜。由于氘代策略降低了分子振动频率，4PACzd8调节了顶部钙钛矿的结晶并抑制了界面非辐射复合。此外，值得注意的是，4PACzd8表现出增强的紫外线吸收特性，从而为下层钙钛矿薄膜提供了更好的保护，防止其因紫外线照射而降解。与非氘代类似物4PACz相比，采用4PACzd8的最佳器件显示出更高的功率转换效率（PCE），为24.87%，且具有出色的稳定性。24.87%的令人印象深刻的功率转换效率是迄今为止以简单咔唑基自组装单分子膜作为空穴传输层的倒置钙钛矿太阳能电池的最高值之一。
