posted on 2022-01-25, 19:36authored byHaoran Liu, Kangrong Yan, Jack Rao, Zeng Chen, Benfang Niu, Yanchun Huang, Huanxin Ju, Buyi Yan, Jizhong Yao, Haiming Zhu, Hongzheng Chen, Chang-Zhi Li
The
heterointerface between a semiconducting metal oxide and a
perovskite critically impacts on the overall performance of perovskite
solar cells (PVSCs). Herein, we report a feasible yet effective strategy
to suppress the interfacial reaction between nickel oxide and the
perovskite via chemical passivation with self-assembled dyad molecules,
which leads to the simultaneous improvement of the power conversion
efficiencies (PCEs) and operational lifetimes of inverted PVSCs. As
a result, inverted PVSCs consisting of simple methylammonium iodide
perovskites have achieved an excellent PCE of 20.94% and decent photostability
with 93% of the initial value after 600 h of 1 sun equivalent illumination.
Moreover, this strategy can be readily translated into slot-die fabrication
of perovskite modules, achieving a high PCE of 14.90% with an area
of 19.16 cm2 (no shade in the interconnecting area) and
a geometrical fill factor of 93%. Overall, this work provides an effective
strategy to stabilize the vulnerable heterointerface in PVSCs.