Perovskite quantum dots(PQDs)have been considered promising and effective photovol-taic absorber due to their superior optoelectronic properties and inherent material merits combining perovskites and QDs.However,they exhibit low moisture stability at room humidity(20-30％)owing to many surface defect sites generated by inefficient ligand exchange process.These surface traps must be re-passivated to improve both charge transport ability and moisture stability.To address this issue,PQD-organic semiconductor hybrid solar cells with suitable electrical properties and functional groups might dramatically improve the charge extraction and defect passivation.Conventional organic semicon-ductors are typically low-dimensional(1D and 2D)and prone to excessive self-aggregation,which limits chemical interaction with PQDs.In this work,we designed a new 3D star-shaped semiconducting material(Star-TrCN)to enhance the compatibility with PQDs.The robust bonding with Star-TrCN and PQDs is demonstrated by theoretical modeling and experimental validation.The Star-TrCN-PQD hybrid films show improved cubic-phase stability of CsPbI3-PQDs via reduced surface trap states and suppressed moisture penetration.As a result,the resultant devices not only achieve remarkable device stability over 1000 h at 20-30％relative humidity,but also boost power conversion efficiency up to 16.0％via forming a cascade energy band structure.

Seyeong Lim;Dae Hwan Lee;Hyuntae Choi;Yelim Choi;Dong Geon Lee;Sung Beom Cho;Seonkyung Ko;Jongmin Choi;Younghoon Kim;Taiho Park

Department of Chemical Engineering,Pohang University of Science and Technology(POSTECH),Pohang 37673,Republic of Korea;Department of Materials Science and Engineering,Hanyang University,Seoul 04763,Republic of Korea;Center of Materials Digitalization,Korea Institute of Ceramic Engineering and Technology(KICET),Jinju 52851,Republic of Korea;Department of Materials Science and Engineering,Ajou University,Suwon 16499,Republic of Korea;Department of Energy Science and Engineering,Daegu Gyeongbuk Institute of Science and Technology(DGIST),Daegu 42988,Republic of Korea;Department of Chemistry,Kookmin University,Seoul 02707,Republic of Korea

纳微快报（英文）

[1]Seyeong Lim;Dae Hwan Lee;Hyuntae Choi;Yelim Choi;Dong Geon Lee;Sung Beom Cho;Seonkyung Ko;Jongmin Choi;Younghoon Kim;Taiho Park-.High-Performance Perovskite Quantum Dot Solar Cells Enabled by Incorporation with Dimensionally Engineered Organic Semiconductor)[J].纳微快报（英文）,2022(12):272-285

photovol,taic,TrCN

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