Defect Passivation and Stress Regulation via Bidentate Anchoring of Lewis Base for High‐Efficiency CsPbI3 Solar Cells DOI

Huifang Han,

Huijing Liu, Yuzhen Lv

et al.

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

Published: April 9, 2025

Abstract All‐inorganic CsPbI 3 perovskites film prepared via the low‐temperature solution method often suffers from numerous defects during crystallization process. Passivators used for surface passivation typically contain monofunctional groups, including sulfur, nitrogen, and oxygen. These monodentate groups bind to uncoordinated Pb 2+ by sharing electron pairs, thereby reducing defects. However, anchoring formed is relatively weak susceptible be damage due its low bond strength. Herein, a bidentate Lewis base, 2‐(2‐pyridyl)ethylamine (2‐PyEA), containing pyridine ring an alkyl amine, employed passivate stabilize crystal structure. Compared ligands, 2‐PyEA displays significantly enhanced coordination ability. In particular, of introduces lattice distortion transforms tensile stress into compressive within film, improving structural stability perovskite material. As result, solar cells treated with achieve impressive power conversion efficiencies (PCEs) 21.35% 17.19% active areas 0.09 1.0 cm 2 , respectively. Notably, device achieves even higher PCE 39.95% under indoor illumination conditions. The devices exhibit ambient conditions 5% relative humidity.

Language: Английский

Locking Surface Dimensionality for Endurable Interface in Perovskite Photovoltaics DOI Creative Commons
Xu Zhang,

Yixin Luo,

Xiaonan Wang

et al.

Carbon Energy, Journal Year: 2025, Volume and Issue: unknown

Published: March 7, 2025

ABSTRACT Surface passivation with organic ammoniums improves perovskite solar cell performance by forming 2D/quasi‐2D structures or adsorbing onto surfaces. However, complexity from mixed phases can trigger phase transitions, compromising stability. The control of surface dimensionality after ammonium presents significant importance to device In this study, we developed a poly‐fluorination strategy for treatment in cells, which enabled high and durable interfacial purity passivation. locked was achieved through robust interaction between the poly‐fluorinated surface, along steric hindrance imparted fluorine atoms, reducing its reactivity penetration capabilities. hydrophobicity also aids moisture resistance layer. champion power conversion efficiency (PCE) 25.2% certified 24.6%, 90% initial PCE retained approximately 1200 h under continuous 1‐sun illumination, over 14,400 storage stability superior high‐temperature operation.

Language: Английский

Citations

0
2D Capping Layer Passivation toward Inorganic CsPbI3 Perovskite Minimodule DOI Open Access

Haifei Wang,

Bowei Li, Fang Liu

et al.

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

Published: March 27, 2025

Abstract Surface termination is so far the mainstream passivating method to enhance performance of CsPbI 3 solar cells. However, surface can hardly achieve effective and homogeneous passivation on large‐area films, which one key challenge toward high‐performance inorganic perovskite modules (PSMs). The strong ionic bond between Cs Pb‐I framework in makes it difficult construct 2D layer film via post treatment, otherwise a classic effectual approach for defect elimination organic–inorganic hybrid perovskites. Herein, novel programmable reconstruction strategy reported that facilely tune using 2‐(1‐cyclohexenyl) ethyl ammonium iodide (CHEAI). In comparison termination, situ formation CHEA 2 PbI 4 by adjusting stoichiometry CHEAI demonstrates more comprehensive effects favorable energy level alignment films. Such construction has greatly facilitated enhancement device performance, especially when scaling up area. optimal PSM (active area 12.44 cm ) based achieves record‐high efficiency 19.32% (certified 18.83%) with much improved stability, endorsing practical promotion this intrinsically stable material.

Language: Английский

Citations

0
Low-Temperature Purification of Intermediate Phases for Enhanced Stability and Efficiency in FAPbI3 Solar Cells DOI
Qin Gao, Can Wang, Yi Pan

et al.

Nano Energy, Journal Year: 2025, Volume and Issue: unknown, P. 110945 - 110945

Published: March 1, 2025

Language: Английский

Citations

0
Synergistic Optimization of n‐i‐p Structured Monolithic All‐Inorganic Perovskite/Organic Tandem Solar Cells Achieving Efficiency over 24% DOI
Shan Jiang, Zhikuan Wang, Chunling Xu

et al.

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

Published: April 8, 2025

Abstract CsPbI 2 Br‐based perovskite solar cells (PSCs) garner significant attention in recent years due to their superior thermal stability compared the organic–inorganic hybrid counterparts. Besides, with a bandgap of 1.92 eV making Br ideal candidates for combining organic semiconductors construct perovskite/organic tandem (TSCs), which achieve complementary absorption and high power conversion efficiency (PCE). However, severe voltage loss at interconnection layer (ICL) unbalanced current subcells restrict improvement TSCs. Herein, n‐i‐p structured monolithic all‐inorganic TSC is constructed structure ITO/Cl@MZO/CsPbI Br/PM6/MoO 3 /Ag/PFN‐Br/PM6:BTP‐BO‐4Cl:PC 71 BM/MoO /Ag. The thickness front subcell ratio PM6:BTP‐BO‐4Cl:PC BM rear are optimized simultaneously higher J sc . Instead unstable Spiro‐OMeTAD, PM6 employed as hole transport material (HTM), ICL fine‐tuned ensure fill factor (FF) small open‐circuit ( V oc ) TSC. As result, remarkable PCE 24.10%, along 13.90 mA cm −2 an FF 80.97% achieved, among best performance Furthermore, exhibits outstanding under atmospheric conditions.

Language: Английский

Citations

0
Defect Passivation and Stress Regulation via Bidentate Anchoring of Lewis Base for High‐Efficiency CsPbI3 Solar Cells DOI

Huifang Han,

Huijing Liu, Yuzhen Lv

et al.

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

Published: April 9, 2025

Abstract All‐inorganic CsPbI 3 perovskites film prepared via the low‐temperature solution method often suffers from numerous defects during crystallization process. Passivators used for surface passivation typically contain monofunctional groups, including sulfur, nitrogen, and oxygen. These monodentate groups bind to uncoordinated Pb 2+ by sharing electron pairs, thereby reducing defects. However, anchoring formed is relatively weak susceptible be damage due its low bond strength. Herein, a bidentate Lewis base, 2‐(2‐pyridyl)ethylamine (2‐PyEA), containing pyridine ring an alkyl amine, employed passivate stabilize crystal structure. Compared ligands, 2‐PyEA displays significantly enhanced coordination ability. In particular, of introduces lattice distortion transforms tensile stress into compressive within film, improving structural stability perovskite material. As result, solar cells treated with achieve impressive power conversion efficiencies (PCEs) 21.35% 17.19% active areas 0.09 1.0 cm 2 , respectively. Notably, device achieves even higher PCE 39.95% under indoor illumination conditions. The devices exhibit ambient conditions 5% relative humidity.

Language: Английский

Citations

0