Synergistic Interface Engineering via o‐Difluorobenzene‐Mediated HPWO Crystallization and ITO Fluorination for 20.57% Efficiency Organic Solar Cells DOI

Xingjian Dai,

Ben Fan,

Xiaopeng Xu

et al.

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

Published: April 25, 2025

Abstract Interfacial energy loss is a critical challenge in achieving high‐efficiency organic solar cells (OSCs), primarily due to mismatched levels and inefficient charge collection. Herein, bifunctional interface engineering strategy proposed, employing an ethanol/o‐difluorobenzene (EtOH/o‐DFB) dual‐solvent system for phosphotungstic acid (HPWO) processing. During film formation, o‐DFB regulates HPWO crystallization by suppressing excessive aggregation, while enabling situ ITO fluorination through the adsorbed o‐DFB. This synergistic approach simultaneously mitigates trap‐assisted nonradiative recombination at hole transport layer enhancing electrode work function, resulting better ohmic contact, minimized trap‐state densities, improved level alignment electrode/active interface. The effectiveness of this demonstrated across multiple active systems. Remarkable power conversion efficiencies 19.55%, 20.07%, 20.57% are achieved PM6/L8‐BO, D18/L8‐BO, D18/BTP‐eC9‐based OSCs, respectively. Notably, PCE represents one highest reported date highlighting potential advancing high‐performance photovoltaics.

Language: Английский

3,4-Difluoropyridine based polymer additives for optimizing aggregation and phase separation enable 20.07% efficiency layer-by-layer organic solar cells DOI

Chunhong Zhou,

Xingjian Dai,

Chentong Liao

et al.

Polymer, Journal Year: 2025, Volume and Issue: unknown, P. 128380 - 128380

Published: April 1, 2025

Language: Английский

Citations

0
Synergistic Interface Engineering via o‐Difluorobenzene‐Mediated HPWO Crystallization and ITO Fluorination for 20.57% Efficiency Organic Solar Cells DOI

Xingjian Dai,

Ben Fan,

Xiaopeng Xu

et al.

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

Published: April 25, 2025

Abstract Interfacial energy loss is a critical challenge in achieving high‐efficiency organic solar cells (OSCs), primarily due to mismatched levels and inefficient charge collection. Herein, bifunctional interface engineering strategy proposed, employing an ethanol/o‐difluorobenzene (EtOH/o‐DFB) dual‐solvent system for phosphotungstic acid (HPWO) processing. During film formation, o‐DFB regulates HPWO crystallization by suppressing excessive aggregation, while enabling situ ITO fluorination through the adsorbed o‐DFB. This synergistic approach simultaneously mitigates trap‐assisted nonradiative recombination at hole transport layer enhancing electrode work function, resulting better ohmic contact, minimized trap‐state densities, improved level alignment electrode/active interface. The effectiveness of this demonstrated across multiple active systems. Remarkable power conversion efficiencies 19.55%, 20.07%, 20.57% are achieved PM6/L8‐BO, D18/L8‐BO, D18/BTP‐eC9‐based OSCs, respectively. Notably, PCE represents one highest reported date highlighting potential advancing high‐performance photovoltaics.

Language: Английский

Citations

0