首页|Minimizing interfacial energy losses in inverted perovskite solar cells by a dipolar stereochemical 2D perovskite interface

Minimizing interfacial energy losses in inverted perovskite solar cells by a dipolar stereochemical 2D perovskite interface

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Inverted perovskite solar cells(PSCs)have attracted broad research and industrial interest owing to their suppressed hysteresis,cost-effectiveness,and easy-fabrication.However,the issue of non-radiative recombination losses at the n-type interface between the perovskite and fullerene has impeded further improvement of photovoltaic performance.Here,we modify the n-type interface of FAPbI3 perovskite films by constructing a stereochemical two-dimensional(2D)perovskite interlayer,in which the organic cations comprise both pyridine and ammonium groups.The pyridine N donor can create stable bonding with the surface-uncoordinated Pb on the perovskite,thereby passivating the shallow-level defects and enhancing the air stability of the film.Furthermore,the pyridine N donor also offers a positive polar interface to decrease the surface work function of the perovskite film,enabling n-type modification.Ultimately,we employ a p-i-n photovoltaic(PV)device with the positive dipole interlayer at perovskite/fullerene contact and achieve remarkable photoelectric conversion efficiency(PCE)of 22.0％.

Perovskite solar cellsDipole interlayerStereochemistryNon-radiative recombination

Junjie Qian、Jingjing He、Qihang Zhang、Chenyue Zhu、Shilin Chen、Zhanpeng Wei、Xuesong Leng、Ziren Zhou、Benben Shen、Yu Peng、Qiang Niu、Shuang Yang、Yu Hou

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Key Laboratory for Ultrafine Materials of Ministry of Education,Shanghai Engineering Research Center of Hierarchical Nanomaterials,School of Materials Science and Engineering,East China University of Science and Technology,Shanghai 200237,China

National Enterprise Technology Center,Inner Mongolia Erdos Electric Power and Metallurgy Group Company Limited,Ordos 016064,Inner Mongolia,China

National Ten Thousand Talent Program for Young Topnotch Talent,ChinaNational Natural Science Fund for Excellent Young Scholars,China国家自然科学基金国家自然科学基金Shanghai Pilot Program for Basic Research,Chinathe"Dawn"Program of Shanghai Education Commission,ChinaShanghai Municipal Natural Science Foundation,ChinaScience and Technology Innovation Plan of Shanghai Science and Technology Commission,ChinaPostdoctoral Research Foundation of China,China中央高校基本科研业务费专项中央高校基本科研业务费专项Major Science and Technology Projects of Inner Mongolia Autonomous Region,ChinaShanghai Engineering Research Center of Hierarchical Nanomaterials,China

52022030519721115220333022TQ1400100-522SG2822ZR141800022YF14100002021M701190JKD01231632JKVD12310412021ZD004218DZ2252400

2024

10.1016/j.jechem.2023.11.039

能源化学
中国科学院大连化学物理研究所 中国科学院成都有机化学研究所

能源化学

CSTPCDEI
影响因子：0.654
ISSN：2095-4956
年,卷(期)：2024.90(3)
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