Bifunctional 4,5-Diiodoimidazole Interfacial Engineering Enables Simultaneous Defect Passivation and Crystallization Control for High-Efficiency Inverted Perovskite Solar Cells DOI Creative Commons

Huaxi Gao,

Yu Zhang,

Ihtesham Ghani

et al.

Nanomaterials, Journal Year: 2025, Volume and Issue: 15(10), P. 766 - 766

Published: May 20, 2025

Despite the rapid efficiency advancement of perovskite solar cells (PSCs), non-radiative recombination at buried interface between self-assembled monolayers (SAMs) and remains a critical bottleneck, primarily due to interfacial defects energy level mismatch. In this study, we demonstrate bifunctional interlayer engineering strategy by introducing 4,5-diiodoimidazole (4,5-Di-I) Me-4PACz/perovskite interface. This approach uniquely addresses two fundamental limitations SAM-based interfaces: insufficient defect passivation capability conventional Me-4PACz steric hindrance effects poor wettability on hydrophobic SAM surfaces that exacerbates voids. The imidazole derivatives not only form strong Pb–N coordination bonds with undercoordinated Pb2+ but also modulate surface Me-4PACz, enabling growth pinhole-free films preferential crystal orientation. champion device 4,5-Di-I modification achieves power conversion (PCE) 24.10%, VOC enhancement from 1.12 V 1.14 V, while maintaining 91% initial PCE after 1300 h in N₂ atmosphere (25 °C), demonstrating superior stability under ISOS-L-2 protocols. work establishes universal for multifunctionality design, proving simultaneous suppression crystallization control can break long-standing trade-off solution-processed photovoltaics.

Language: Английский

Advancing Self‐Assembled Molecules Toward Interface‐Optimized Perovskite Solar Cells: from One to Two DOI Creative Commons
Tanghao Liu, Chuanyao Luo,

Ruiqin He

et al.

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

Published: April 29, 2025

Abstract Perovskite solar cells (PSCs) have rapidly gained prominence as a leading candidate in the realm of solution‐processable third‐generation photovoltaic (PV) technologies. In high‐efficiency inverted PSCs, self‐assembled monolayers (SAMs) are often used hole‐selective layers (HSLs) due to advantages high transmittance, energy level matching, low non‐radiative recombination loss, and tunable surface properties. However, SAMs been recognized suffer from some shortcomings, such incomplete coverage, weak bonding with substrate or perovskite, instability, so on. The combination different so‐called co‐SAM is an effective strategy overcome this challenge. Perspective, latest achievements molecule design, deposition method, working principle, application discussed. This comprehensive overview milestones advancing research field, coupled in‐depth analysis improved interface properties using approach, aims offer valuable insights into key design principles. Furthermore, lessons learned will guide future development SAM‐based HSLs perovskite‐based optoelectronic devices.

Language: Английский

Citations

0
Bifunctional 4,5-Diiodoimidazole Interfacial Engineering Enables Simultaneous Defect Passivation and Crystallization Control for High-Efficiency Inverted Perovskite Solar Cells DOI Creative Commons

Huaxi Gao,

Yu Zhang,

Ihtesham Ghani

et al.

Nanomaterials, Journal Year: 2025, Volume and Issue: 15(10), P. 766 - 766

Published: May 20, 2025

Despite the rapid efficiency advancement of perovskite solar cells (PSCs), non-radiative recombination at buried interface between self-assembled monolayers (SAMs) and remains a critical bottleneck, primarily due to interfacial defects energy level mismatch. In this study, we demonstrate bifunctional interlayer engineering strategy by introducing 4,5-diiodoimidazole (4,5-Di-I) Me-4PACz/perovskite interface. This approach uniquely addresses two fundamental limitations SAM-based interfaces: insufficient defect passivation capability conventional Me-4PACz steric hindrance effects poor wettability on hydrophobic SAM surfaces that exacerbates voids. The imidazole derivatives not only form strong Pb–N coordination bonds with undercoordinated Pb2+ but also modulate surface Me-4PACz, enabling growth pinhole-free films preferential crystal orientation. champion device 4,5-Di-I modification achieves power conversion (PCE) 24.10%, VOC enhancement from 1.12 V 1.14 V, while maintaining 91% initial PCE after 1300 h in N₂ atmosphere (25 °C), demonstrating superior stability under ISOS-L-2 protocols. work establishes universal for multifunctionality design, proving simultaneous suppression crystallization control can break long-standing trade-off solution-processed photovoltaics.

Language: Английский

Citations

0