Stabilizing buried interface by bilateral bond strength equilibrium strategy toward efficient perovskite photovoltaics.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 40998764.
- Also identified by DOI 10.1038/s41467-025-63389-z and PMC identifier 12462464.
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Abstract
The NiO<sub>x</sub>/perovskite interface in p-i-n inverted perovskite solar cells (PSCs) suffers from trap-assisted nonradiative recombination, chemical reactions and weak adhesion. The self-assembled molecules are usually designed to address the above issues. However, absonant bilateral bond strength with NiO<sub>x</sub> and perovskite hinders the realization of efficient and stable PSCs. Herein, a bilateral bond strength equilibrium strategy is proposed to stabilize the buried interface in inverted PSCs through functional group and spatial conformation engineering. 1-(benzothiaxole-2-ylthio)succnic acid (BTSA) is adsorbed on the surface of NiO<sub>x</sub> through the S atom, π-ring, and N atom in the benzothiazole, making benzothiazole ring parallel to the NiO<sub>x</sub> surface, which is beneficial for passivating bilateral defects and improving hole transport. This strategy leads to effective interfacial defect passivation, interfacial chemical reaction suppression and ameliorated electrical properties of NiO<sub>x</sub> films, enabling 1.53 eV PSCs and large-area module (764 cm<sup>2</sup>) with a PCE of 26.98% (certified 26.65%) and 21.98%, respectively.