Authors
Ruiyuan Hu, Mengyuan Cai, Jinhui Xue, Yonggui Sun, Taomiao Wang, Tao Zhang, Xing'ao Li, Yuhui Ma, Hanlin Hu
Published in
Small (Weinheim an der Bergstrasse, Germany). Pages e74470. Jul 09, 2026. Epub Jul 09, 2026.
Abstract
Precise control over the crystallization and growth of wide-bandgap (WBG) three-dimensional (3D) perovskite is essential for achieving high photovoltaic performance and enabling efficient tandem solar cells (TSCs). Herein, we report a selective templating growth (STG) strategy utilizing trimethylsulfonium iodide (TMSI) to regulate the crystallization dynamics of WBG perovskites. The strong coordination and templating capability of TMSI facilitate the in-situ formation of a one-dimensional (1D) perovskite intermediate, which uniquely directs the preferential (100) orientation and enhancing the lattice coherence within the resulting 3D perovskite framework. Moreover, a vertical concentration gradient of TMS+ ions modulates crystallization kinetics, extending the time window for halide homogenization while simultaneously enabling effective grain boundary passivation through anchored PbI2 nanosheets. As a result, optimized WBG perovskite solar cells (PSCs) deliver a champion power conversion efficiency (PCE) of 19.71%, accompanied by an enhanced open-circuit voltage (VOC) of 1.35 V and significantly improved photostability. When integrated into monolithic perovskite/organic TSCs, the devices achieve a notable PCE of 26.51%. This work establishes a mechanistically grounded strategy for regulating perovskite crystallization through intermediate-phase templating, offering a viable pathway toward high-performance WBG absorbers for the next-generation multi-junction photovoltaics.
PMID:
42424642
Bibliographic data and abstract were imported from PubMed on 10 Jul 2026.
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