Boosting the Performance of Carbon‐Based Hole‐Transport‐Layer‐Free CsPbI₂Br Solar Cells by Adding Imidazole Small Molecules

Progress in Photovoltaics Research and Applications, Journal Year: 2025, Volume and Issue: unknown

Published: May 10, 2025

ABSTRACT Carbon‐based hole‐transport‐layer (HTL)‐free CsPbI 2 Br solar cells have attracted considerable interest due to the improved stability, simple structure, rich application scenarios, and low cost, as compared with their organic–inorganic hybrid counterparts. However, uncoordinated Pb 2+ mobile I − ions impose challenges for fabricating a cell good comprehensive performance. To address related issues, herein, we introduce facile additive strategy using an organic small molecule material, i.e., 1H‐imidazole‐4‐carboxylic acid (ICA), improve performance of carbon‐based HTL‐free cells. Benefitting from effective passivation anchoring , well increased crystallinity reduced surface roughness layers by ICA, optimal delivers power conversion efficiency (PCE) 14.71%, ⁓24.7% increment relative PCE 11.80% control device without ICA addition. Moreover, ICA‐added exhibits evidently hysteresis current–voltage characteristics notably enhanced in contrast device.

Language: Английский

Efficient and Stable Carbon-Based Hole-Transport-Layer-Free CsPbI₂Br Solar Cells by Adding Trace Amounts of Yttrium Acetate into the Photoactive Layer

Nano Letters, Journal Year: 2025, Volume and Issue: unknown

Published: May 21, 2025

CsPbI2Br solar cells are a kind of important inorganic perovskite photovoltaic (PV) device that can serve as the top in tandem configuration or semitransparent PV devices with balanced structural stability and light absorption. However, issues relating to their power conversion efficiency (PCE) long-term still severely impeded by uncoordinated Pb2+ migratable I-. To effectively passivate meanwhile anchor I-, herein, we propose simple strategy adding yttrium acetate (Y(Ac)3) photoactive layer. A leading PCE 15.53%, together notably improved reduced current-voltage hysteresis, indicates effectiveness this additive strategy, demonstrated carbon-based hole-transport-layer (HTL)-free having higher performance-to-cost ratio than conventional counterparts because they abandon usage noble metal electrodes expensive organic HTLs also detrimental

Language: Английский

Multifunctional Optimization of MXene for Enhanced Comprehensive Performance of Crystal Silicon‐MXene Back‐Heterojunction Solar Cells

Small, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 19, 2024

Abstract Enhancing the cost‐performance ratio is a fundamental objective for advancement of photovoltaic sector. In this context, development innovative solar cells that offer straightforward device configuration but high performance arguably most crucial element. Herein, an undoped back‐heterojunction crystalline silicon (c‐Si) cell endeavored to be crafted by simply drop‐casting Ti 3 C 2 T x MXene ethanol colloidal solution onto backside n ‐type c‐Si ( ‐Si) wafer. Leveraging good electrical property and stability, as well adjustable work function treated europium trifluoromethanesulfonate (Eu(OTF) ), elementary Ag/ZnO/ ‐Si/MXene/Ag delivers impressive power conversion efficiency (PCE) 12.5%. Moreover, deposition SiO passivation layer through simple self‐developed electrochemical method increases PCE further 13.5% ameliorating interfacial contact between ‐Si. unencapsulated exhibits improved compared control without Eu(OTF) treatment passivation.

Language: Английский