首页|Modulating perovskite crystallization and band alignment using coplanar molecules for high-performance indoor photovoltaics

Modulating perovskite crystallization and band alignment using coplanar molecules for high-performance indoor photovoltaics

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The proper bandgap and exceptional photostability enable CsPbl3 as a potential candidate for indoor pho-tovoltaics(IPVs),but indoor power conversion efficiency(PCE)is impeded by serious nonradiative recom-bination stemming from challenges in incomplete DMAPbI3 conversion and lattice structure distortion.Here,the coplanar symmetric structure of hexyl sulfide(HS)is employed to functionalize the CsPbI3 layer for fabricating highly efficient IPVs.The hydrogen bond between HS and DMAI promotes the conversion of DMAPbI3 to CsPbI3,while the coplanar symmetric structure enhances crystalline order.Simultaneously,surface sulfidation during HS-induced growth results in the in situ formation of PbS,spontaneously creating a CsPbI3 N-P homojunction to enhance band alignment and carrier mobility.As a result,the CsPbI3&HS devices achieve an impressive indoor PCE of 39.90％(Pin:334.6 μW cm-2,Pout:133.5 μW cm-2)under LED@2968 K,1062 lux,and maintain over 90％initial PCE for 800 h at～30％air ambient humidity.

Perovskite indoor photovoltaicsCsPbI3Coplanar symmetric structure moleculesCrystallization kineticsHydrogen bondN-P homojunction

Qu Yang、Shuhan Fan、Haozhe Zhang、Zhenhuang Su、Xingyu Gao、Hui Shen、Mingkui Wang、Xiu Gong

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College of Physics,& Guizhou Province Key Laboratory for Photoelectrics Technology and Application,Guizhou University,Guiyang 550025,Guizhou,China

State Key Laboratory of Public Big Data,Guizhou University,Guiyang 550025,Guizhou,China

Shanghai Synchrotron Radiation Facility(SSRF),Shanghai Advanced Research Institute,Chinese Academy of Sciences,Shanghai 201204,China

Wuhan National Laboratory for Optoelectronics,School of Optical and Electronic Information,Huazhong University of Science and Technology,Wuhan 430074,Hubei,China

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2024

10.1016/j.jechem.2024.06.034

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)：2024.98(11)