Dual-stage Crystallization Regulation for Efficient and Stable Perovskite Solar Cells

Materials Today Energy, Journal Year: 2025, Volume and Issue: unknown, P. 101836 - 101836

Published: Feb. 1, 2025

Language: Английский

High‐Performance Perovskite Solar Cells via Synergistic Grating Microstructures and Dynamic‐Bonded Ion‐Conductive Elastomers

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: April 25, 2025

Abstract Perovskite solar cells (PSCs) have emerged as a prominent focus in energy research owing to their remarkable power conversion efficiency (PCE). However, the realization, maintenance, and even repair of high perovskite are still difficult issues. Herein, synergistic strategy grating microstructures ion‐conducting elastomers (ICE) based on dynamic hindered urea‐carbamate bonds is proposed realize high‐efficiency long‐term stable PSCs. The microstructured PbI 2 (G‐PbI ) can initially optimize crystallization behavior perovskite, fact that introduction ICE achieves 25.61% efficient featuring graded demonstrates triple‐functionality: i) Abundant carbonyl (‐C(O)‐) coordination sites within strongly interact with , enhancing kinetics; ii) intrinsic conductivity facilitates charge carrier transport extraction at grain boundaries interfaces; iii) moisture‐responsive urea coupled bond reorganization endows device exceptional hydrothermal stability (T 80 >1500 h), more interestingly, ICE‐containing devices be simply heat‐treated recover photovoltaic performance. A hierarchical covalent networks opens new insights into field constructing, maintaining, restoring

Language: Английский

Unveiling the Effect of Polymerization Values on the Crystallization Behavior of Perovskite Films for Efficient and Stable Solar Cells

Small, Journal Year: 2025, Volume and Issue: unknown

Published: April 26, 2025

Abstract Obtaining high‐quality perovskite films is crucial for reducing non‐radiative recombination and improving device performance. As reported, the crystallization process of can be effectively tailored by introducing multifunctional additives. In this work, polyvinyl pyrrolidone (PVP) with varying degrees polymerization (DP) values (K15, K30, K90) are systematically screened utilized as an additive to regulate defect density control films. This regulation achieved through coordination interactions between perovskites their multi‐carbonyl groups PVP. Among selected polymers, K30 carbonyl polymer exhibits a suitable viscosity bind strength, which facilitated significant delay in intermediate phase transition accelerated nucleation. result, enhanced crystallinity, prolonged PL lifetime, no residual PbI 2 achieved. The K30‐treated MA‐free demonstrated PCE 24.16% remarkable V OC 1.2 V. Moreover, strategy extended RbCsFAMA quadruple‐cation films, delivering impressive 25.35% minimal deficit 0.35 work provides effective approach modulate crystal growth highlights significance DP polymeric

Language: Английский