Transient Dipole Strategy Boosts Highly Oriented Self-Assembled Monolayers for Organic Solar Cells Approaching 21% Efficiency DOI

Hongyu Mou,

Yue Yin, Haiyang Chen

et al.

Journal of the American Chemical Society, Journal Year: 2025, Volume and Issue: unknown

Published: June 6, 2025

Self-assembled monolayers (SAMs) based on carbazole with minimal parasitic absorption, such as the most widely used [2-(9H-carbazol-9-yl)ethyl]phosphonic acid (2PACz), dominate high-performance hole transport layer (HTL) for conventional organic solar cells (OSCs). However, small dipole moment of 2PACz molecules results in weak molecular dipole-dipole interactions, leading to disordered orientation and restricting work function modulation, which causes serious interfacial energy loss. Here, we grafted thiophene groups at both ends obtain an SAM material (Th-Cz), formed a transient resonance structure during thermal annealing, resulting twice-enlarged moment. This strengthened facilitating ordered arrangement Th-Cz film, contributing higher function, enhanced extraction suppressed losses SAM/active interface. Additionally, van der Waals interactions between donors enabled donor crystallizing before acceptor, this phenomenon is different from cocrystallization observed 2PACz-based active layers. manipulation crystallization dynamics favors vertical phase separation donor-rich bottom layers, balanced charge-carrier mobilities. The resultant OSCs PM6:Y6 D18-Cl:N3:AT-β2O HTL achieved power conversion efficiencies (PCEs) 19.34% 20.91% (certified 20.67%), respectively, setting record PCE PM6:Y6-based achieving highest certified single-junction date. Notably, also demonstrated exceptional compatibility flexible OSCs, delivering 19.63%.

Language: Английский

Molecular Engineering of Carbazole and Acridine Based Hole Transport Materials for Perovskite Solar Cells DOI

Jingjing Zhao,

Licheng Liu, Mengde Zhai

et al.

Dyes and Pigments, Journal Year: 2025, Volume and Issue: unknown, P. 112783 - 112783

Published: March 1, 2025

Language: Английский

Citations

0
Unveiling the Effect of Polymerization Values on the Crystallization Behavior of Perovskite Films for Efficient and Stable Solar Cells DOI

Weijian Tang,

Yu Chen,

Ruisen Shi

et al.

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

Citations

0
Indacenodithiophene-4,9-dione-Based D-A-D Type Dopant-Free Hole Transporting Materials for Environmentally Robust 30% Efficient Indoor Perovskite Solar Cells DOI

Sibu Manna,

Prasun Kumar,

Rahul Tiwari

et al.

Energy & Fuels, Journal Year: 2025, Volume and Issue: unknown

Published: May 19, 2025

Language: Английский

Citations

0
Fluorescent Hole-Selective Contact for Ultraviolet-Stable Inverted Perovskite Solar Cells DOI

Nai Wang,

Gongnv Xu,

Tonghui Guo

et al.

Chemical Communications, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

Fluorescent material at hole-selective contact enhanced light-harvesting efficiency and photo-stability in inverted perovskite solar cells, achieving 4.4% photocurrent increase 80% initial retention after 1000 h of UV illumination.

Language: Английский

Citations

0
Interfacial Engineering Using C‐3 Alkyl Linker‐Based Carbazole‐Derived SAM Layers to Achieve 41.77% Indoor Efficiency in Wide‐Bandgap Perovskite Solar Cells DOI
Premkumar Gnanasekaran, Zhong‐En Shi,

Chih‐Lin Wang

et al.

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

Published: June 1, 2025

Abstract The unique molecular properties of carbazole‐derived‐phosphonic acid‐base self‐assembled monolayers (SAMs), have great potential in applying perovskite solar cells (PSCs) and optoelectronic devices. SAMs been successfully used PSCs wide bandgap (WBG)‐indoor with excellent hole‐extraction minimize energy loss at the interface defects. Surprisingly, nearly all reported an even number carbons chain linkers (i.e., 2, 4, 6) are to connect carbazole phosphonic acid fragment. In this work, three a n ‐propyl (3C) linker substitutes (R = H, methoxy, phenyl) on investigated, designated as 3C‐H , 3C‐OMe 3C‐Ph . These function stand‐alone hole‐selective layers anchored ITO/nickel oxide (NiO x ) p‐i‐n device architecture. WBG Cs 0.18 FA 0.82 Pb(I 0.8 Br 0.2 3 films deposited onto ITO/NiO functionalized SAMs. based exhibited open‐circuit voltage ( V OC 1.23 V, short‐circuit current density J SC 21.53 mA cm −2 maximum power conversion efficiency (PCE) 21.59% under AM 1.5G illumination. Additionally, indoor lighting conditions, ‐based achieved 280.37 µA 1.09 fill factor 81.43%, resulting overall PCE 41.77%.

Language: Английский

Citations

0
Transient Dipole Strategy Boosts Highly Oriented Self-Assembled Monolayers for Organic Solar Cells Approaching 21% Efficiency DOI

Hongyu Mou,

Yue Yin, Haiyang Chen

et al.

Journal of the American Chemical Society, Journal Year: 2025, Volume and Issue: unknown

Published: June 6, 2025

Self-assembled monolayers (SAMs) based on carbazole with minimal parasitic absorption, such as the most widely used [2-(9H-carbazol-9-yl)ethyl]phosphonic acid (2PACz), dominate high-performance hole transport layer (HTL) for conventional organic solar cells (OSCs). However, small dipole moment of 2PACz molecules results in weak molecular dipole-dipole interactions, leading to disordered orientation and restricting work function modulation, which causes serious interfacial energy loss. Here, we grafted thiophene groups at both ends obtain an SAM material (Th-Cz), formed a transient resonance structure during thermal annealing, resulting twice-enlarged moment. This strengthened facilitating ordered arrangement Th-Cz film, contributing higher function, enhanced extraction suppressed losses SAM/active interface. Additionally, van der Waals interactions between donors enabled donor crystallizing before acceptor, this phenomenon is different from cocrystallization observed 2PACz-based active layers. manipulation crystallization dynamics favors vertical phase separation donor-rich bottom layers, balanced charge-carrier mobilities. The resultant OSCs PM6:Y6 D18-Cl:N3:AT-β2O HTL achieved power conversion efficiencies (PCEs) 19.34% 20.91% (certified 20.67%), respectively, setting record PCE PM6:Y6-based achieving highest certified single-junction date. Notably, also demonstrated exceptional compatibility flexible OSCs, delivering 19.63%.

Language: Английский

Citations

0