Leveraging Multilayer Hole Selective Layers to Boost Organic Photovoltaic Power Conversion Efficiency

IF 5.4 3区材料科学 Q2 CHEMISTRY, PHYSICAL ACS Applied Energy Materials Pub Date : 2025-01-19 DOI:10.1021/acsaem.4c0299010.1021/acsaem.4c02990

Yang-Yen Yu*, Jia-Hong Xu, Bing-Huang Jiang, Yu-Chih Hsu and Chih-Ping Chen*,

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Abstract

Hole selective layers (HSLs) play a crucial role in the efficiency of organic photovoltaics (OPVs). Self-assembled monolayers (SAMs) offer a powerful approach to engineer the interfacial properties of HSLs in OPVs. In this work, we utilized the 2-(9H-carbazol-9-yl)ethyl)phosphonic acid (2PACz) SAM to modify the ITO/MoO₃ interface and the surface of MoO₃, thereby forming multilayer HSLs. 2PACz regulates the surface work function (WF) of the electrodes, leading to a more favorable energy level alignment, reduced interfacial resistance, and facilitated charge carrier transport and extraction. The resulting OPV devices demonstrated improved fill factor (FF) and power conversion efficiency (PCE). Additionally, the reduction in interface defects effectively suppressed carrier recombination, ultimately achieving a maximum PCE of 16.33%. This indicates that the design of composite HSLs with multilayer interface modification is an effective strategy for improving OPV efficiency and provides ideas for further advancing OPV development.

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来源期刊

ACS Applied Energy Materials Materials Science-Materials Chemistry

CiteScore

10.30

自引率

6.20%

发文量

1368

期刊介绍： ACS Applied Energy Materials is an interdisciplinary journal publishing original research covering all aspects of materials, engineering, chemistry, physics and biology relevant to energy conversion and storage. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrate knowledge in the areas of materials, engineering, physics, bioscience, and chemistry into important energy applications.