posted on 2024-05-01, 14:37authored byBo Li, Danpeng Gao, Stephanie A. Sheppard, William D. J. Tremlett, Qi Liu, Zhen Li, Andrew J. P. White, Ryan K. Brown, Xianglang Sun, Jianqiu Gong, Shuai Li, Shoufeng Zhang, Xin Wu, Dan Zhao, Chunlei Zhang, Yan Wang, Xiao Cheng Zeng, Zonglong Zhu, Nicholas J. Long
Inverted p-i-n perovskite solar cells (PSCs) are easy
to process
but need improved interface characteristics with reduced energy loss
to prevent efficiency drops when increasing the active photovoltaic
area. Here, we report a series of poly ferrocenyl molecules that can
modulate the perovskite surface enabling the construction of small-
and large-area PSCs. We found that the perovskite–ferrocenyl
interaction forms a hybrid complex with enhanced surface coordination
strength and activated electronic states, leading to lower interfacial
nonradiative recombination and charge transport resistance losses.
The resulting PSCs achieve an enhanced efficiency of up to 26.08%
for small-area devices and 24.51% for large-area devices (1.0208 cm2). Moreover, the large-area PSCs maintain >92% of the initial
efficiency after 2000 h of continuous operation at the maximum power
point under 1-sun illumination and 65 °C.