Dopant-Free Phthalocyanine Hole Conductor with Thermal-Induced Holistic Passivation for Stable Perovskite Solar Cells with 23 Efficiency

Geping Qu; Lei Dong; Ying QiaoDanish KhanQian ChenPengfei XieXuemeng YuXiaoyuan LiuYanggang WangJiangzhao ChenXihan ChenZong-Xiang Xu

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Dopant-Free Phthalocyanine Hole Conductor with Thermal-Induced Holistic Passivation for Stable Perovskite Solar Cells with 23 Efficiency

机译：Dopant-Free Phthalocyanine Hole Conductor with Thermal-Induced Holistic Passivation for Stable Perovskite Solar Cells with 23 Efficiency

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Simultaneous passivation of the defects at the surface and grainboundaries of perovskite films is crucial to achieve efficient and stableperovskite solar cells (PSCs). It is highly desirable to accomplish theabove passivation through rational engineering of hole transport materials(HTMs) in combination with appropriate procedure optimization. Here,methylthiotriphenylamine-substituted copper phthalocyanine (SMe-TPACuPc)is reported as a dopant-free HTM for PSCs, exhibiting excellentefficiency, and stability. After thermal annealing, SMe-TPA-CuPc moleculesdiffused into the bulk of the perovskite film and effectively passivated thedefects in the bulk and at the interface of the perovskite, owing to the stronginteraction between the methylthio moiety and undercoordinated lead. Thebest-performing annealed SMe-TPA-CuPc-based device shows efficiencyof 21.51%, which is higher than the unannealed SMe-TPA-CuPc-baseddevice (power-conversion efficiency (PCE) of 20.75%) and reference dopedspiro-OMeTAD-based device (PCE of 20.61%). Further modification of theperovskite of the annealed SMe-TPA-CuPc-based device by the QAPyBF4additive result in even higher efficiency of 23.0%. It also shows excellentstability, maintaining 96% of its initial efficiency after 3624 h aging at 85 ℃.This work highlights the great potential of phthalocyanine-based dopant-freeHTMs and the defect passivation by thermal-induced molecular diffusionstrategy for developing highly efficient and stable PSCs.

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来源
《Advanced functional materials》 |2022年第41期|2206585.1-2206585.12|共12页
作者
Geping Qu; Lei Dong; Ying QiaoDanish KhanQian ChenPengfei XieXuemeng YuXiaoyuan LiuYanggang WangJiangzhao ChenXihan ChenZong-Xiang Xu;
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作者单位

Key Laboratory of Optoelectronic Technology & Systems(Ministry of Education)College of Optoelectronic EngineeringChongqing UniversityChongqing 400044, China;

Depart of Mechanical and Energy EngineeringSouthern University of Science and TechnologyShenzhen, Guangdong 518055, China;

Department of ChemistrySouthern University of Science and TechnologyShenzhen, Guangdong 518055, China, Guangdong-Hong Kong-Macao Joint Laboratory forPhotonic-Thermal-Electrical Energy Materials and DevicesSouthern University of Science and Technology, SheDepartment of ChemistrySouthern University of Science and TechnologyShenzhen, Guangdong 518055, China;

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copper phthalocyanine; defect passivations; dopant-free hole transport materials; perovskite solar cells; thermal-induced molecular diffusions;

Dopant-Free Phthalocyanine Hole Conductor with Thermal-Induced Holistic Passivation for Stable Perovskite Solar Cells with 23 Efficiency

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