Amorphous F-doped TiO_x Caulked SnO_2 Electron Transport Layer for Flexible Perovskite Solar Cells with Efficiency Exceeding 22.5

Linghui Zhang; Chao Fu; Shi WangMinhuan WangRuiting WangShengling XiangZhiyong WangJing LiuHongru MaYudi WangYing YanMin ChenLei ShiQingshun DongJiming BianYantao Shi

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Amorphous F-doped TiO_x Caulked SnO_2 Electron Transport Layer for Flexible Perovskite Solar Cells with Efficiency Exceeding 22.5

机译：Amorphous F-doped TiO_x Caulked SnO_2 Electron Transport Layer for Flexible Perovskite Solar Cells with Efficiency Exceeding 22.5

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摘要

Flexible perovskite solar cells (f-PSCs) show great promise in portable-powerapplications (e.g., chargers, drones) and low-cost, scalable productions (e.g.,roll-to-roll). However, in conventional n-i-p architecture f-PSCs, the lowtemperatureprocessed metal oxide electron transport layers (ETLs) usuallysuffer from high resistance and severe defects that limit the power conversionefficiency (PCE) improvement of f-PSCs. Besides the enhancement in themobility of metal oxide and passivation for perovskite/ETL interfacial defectsreported in previous literature, herein, the electron transport loss betweenthe metal oxide nanocrystallines within the ETL is studied by introducingan amorphous F-doped TiO_x (F-TiO_x) caulked crystalline SnO_2 compositeETL. The F-TiO_x in this novel composite ETL acts as an interstitial mediumbetween adjacent SnO_2 nanocrystallines, which can provide more electrontransport channels, effectively passivate oxygen vacancies, and optimize theenergy level arrangement, thus significantly enhancing the electron mobilityof ETL and reducing the charge transport losses. The composite ETL-basedf-PSCs achieve a high PCE of 22.70% and good operational stability. Furthermore,a moderate roughness of the composite ETL endows f-PSCs with superiormechanical reliability by virtue of a strong coupling at the ETL/perovskiteinterface, by which the f-PSCs can maintain 82.11% of their initial PCE after4000 bending cycles.

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来源
《Advanced functional materials》 |2023年第11期|2213961.1-2213961.10|共10页
作者
Linghui Zhang; Chao Fu; Shi WangMinhuan WangRuiting WangShengling XiangZhiyong WangJing LiuHongru MaYudi WangYing YanMin ChenLei ShiQingshun DongJiming BianYantao Shi;
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Key Laboratory of Materials Modification by Laser, Ion, and ElectronBeams (Ministry of Education)School of PhysicsDalian University of TechnologyDalian 116024, China State Key Laboratory of Fine ChemicalsSchool of ChemistryDalian University of TechnologyD;

Hangzhou Zhongneng Optoelectronics Technology Co., Ltd.Hangzhou 310018, China;

Physics departmentThe Hong Kong University of Science and TechnologyHong Kong 999077, ChinaKey Laboratory of Materials Modification by Laser, Ion, and ElectronBeams (Ministry of Education)School of PhysicsDalian University of TechnologyDalian 116024, ChinaKey Laboratory for Precision and Non-traditional Machining Technologyof Ministry of EducationDalian University of TechnologyDalian 116024, ChinaState Key Laboratory of Fine ChemicalsSchool of ChemistryDalian University of TechnologyDalian 116024, ChinaSchool of EngineeringBrown UniversityProvidence, Rhode Island 02912, USA;

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正文语种英语
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amorphous TiO_2; defect passivation; electron transport layers; flexible perovskite solar cells; SnO_2;

Amorphous F-doped TiO_x Caulked SnO_2 Electron Transport Layer for Flexible Perovskite Solar Cells with Efficiency Exceeding 22.5

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