Benzimidazole Based Hole-Transporting Materials for High-performance Inverted Perovskite Solar Cells

Yogesh S. Tingare; Chaochin Su; Ja-Hon LinYi-Chun HsiehHong-Jia LinYa-Chun HsuMeng-Che LiGuan-Lin ChenKai-Wei TsengYi-Hsuan YangLeeyih WangHsinhan TsaiWanyi NieWen-Ren Li

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Benzimidazole Based Hole-Transporting Materials for High-performance Inverted Perovskite Solar Cells

机译：Benzimidazole Based Hole-Transporting Materials for High-performance Inverted Perovskite Solar Cells

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Interfaces play a decisive role in perovskite solar cells’ power conversionefficiency and their long-term durability. Small-molecule hole-transportingmaterials (HTMs) have grabbed enormous attention due to their structuralflexibility, material properties, and stabilities, allowing for improved operationaldurability in perovskite photovoltaics. This study synthesizes andinvestigates a new class of benzimidazole-based small molecules, namedYJS001 and YJS003, serving as the HTMs to enable high-efficiency mixedcationmixed-halide perovskite solar cells. The benzimidazole-based materialsare dopant-free HTMs composed of donor and acceptor building blocks thatare designed to engineer the energy level alignment near the HTM/perovskiteinterface. Mixed-cation mixed-halide perovskites can be grown uniformly onboth HTMs with large crystalline grains. It is discovered that the donor-richYJS003-based solar cell exhibits a high open-circuit voltage of 1.09 V witha champion power conversion efficiency of over 20%. Power-dependentcurrent–voltage characteristics of the solar cells are analyzed, from which thehigh performance of YJS003’s excellent hole mobility and well-aligned energylevel is attributed. This work introduces a new class of benzimidazole-basedsmall molecules as HTMs, that paves the path for dopant free interface materialdevelopment for commercialization of perovskite solar cells.

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《Advanced functional materials》 |2022年第33期|2201933.1-2201933.8|共8页
作者
Yogesh S. Tingare; Chaochin Su; Ja-Hon LinYi-Chun HsiehHong-Jia LinYa-Chun HsuMeng-Che LiGuan-Lin ChenKai-Wei TsengYi-Hsuan YangLeeyih WangHsinhan TsaiWanyi NieWen-Ren Li;
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Institute of Organic and Polymeric Materials/Researchand Development Center for Smart Textile TechnologyNational Taipei University of TechnologyTaipei 106344, Taiwan;

Institute of Organic and Polymeric Materials/Researchand Development Center for Smart Textile TechnologyNational Taipei University of TechnologyTaipei 106344, Taiwan,Department of Electro-Optical EngineeringNational Taipei University of TechnologyTaipei 1;

Department of ChemistryNational Central UniversityZhongli 32001, TaiwanCenter for Condensed Matter Sciences/Institute of Polymer Scienceand Engineering/Center of Atomic Initiative for New MaterialsNational Taiwan UniversityTaipei 10617, TaiwanCenter for Integrated NanotechnologiesMaterials Physics and Application DivisionLos Alamos National LaboratoryLos Alamos, NM 87545, USA;

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benzimidazole; dopant-free hole transport materials; hole mobility; inverted perovskite solar cells; perovskite absorbers;

Benzimidazole Based Hole-Transporting Materials for High-performance Inverted Perovskite Solar Cells

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