Room-temperature multiple ligands-tailored SnO_(2) quantum dots endow in situ dual-interface binding for upscaling efficient perovskite photovoltaics with high V_(OC)  

作　　者：Zhiwei Ren Kuan Liu Hanlin Hu Xuyun Guo Yajun Gao Patrick W.K.Fong Qiong Liang Hua Tang Jiaming Huang Hengkai Zhang Minchao Qin Li Cui Hrisheekesh Thachoth Chandran Dong Shen Ming-Fai Lo Annie Ng Charles Surya Minhua Shao Chun-Sing Lee Xinhui Lu Frédéric Laquai Ye Zhu Gang Li 

机构地区：[1]Department of Electronic and Information Engineering,Research Institute for Smart Energy(RISE),Guangdong-Hong Kong-Macao(GHM)Joint Laboratory for Photonic-Thermal-Electrical Energy Materials and Devices,The Hong Kong Polytechnic University,Hung Hom,Kowloon,Hong Kong,China [2]Department of Electrical and Computer Engineering,Nazarbayev University,Nur-Sultan,Kazakhstan [3]The Hong Kong Polytechnic University Shenzhen Research Institute,Shenzhen 518057,China [4]Hoffmann Institute of Advanced Materials,Shenzhen Polytechnic,7098 Liuxian Boulevard,Shenzhen 518055,China [5]Department of Applied Physics,The Hong Kong Polytechnic University,Hung Hom,Kowloon,Hong Kong,China [6]Department of Chemical and Biological Engineering,The Hong Kong University of Science and Technology,Clear Water Bay,Kowloon,Hong Kong,China [7]King Abdullah University of Science and Technology(KAUST),KAUST Solar Center(KSC),Physical Sciences and Engineering Division(PSE),Material Science and Engineering Program(MSE),Thuwal 23955-6900,Kingdom of Saudi Arabia [8]Department of Physics,The Chinese University of Hong Kong,Shatin 999077 Hong Kong,China [9]Center of Super-Diamond and Advanced Films(COSDAF),Department of Chemistry,City University of Hong Kong,Hong Kong,China

出　　处：《Light(Science & Applications)》2021年第12期2467-2481,共15页光（科学与应用)（英文版）

基　　金：This work was financially supported by the Research Grants Council of Hong Kong(GRF grant nos.15246816,15218517 and CRF grant no.C5037-18G);Shenzhen Technology Innovation Commission(Project no.JCYJ20200109105003940);the funding provided by the Hong Kong Polytechnic University(Project Code:1-CDA5 and Sir Sze-yuen Chung Endowed Professorship Fund(8-8480));S/TEM work was carried out at the Hong Kong Polytechnic University and was supported by the Hong Kong Research Grants Council through the Early Career Scheme(Project no.25301617);the Hong Kong Polytechnic University grant(Project no.1-ZE6G).X.G.and Y.Z.thank Dr.Wei Lu for optimizing the JEOL JEM-2100F microscope.G.L.and K.L.thank the RGC Postdoctoral Fellowship Scheme(PDFS2021-5S04);K.L.thanks Guangdong Basic and Applied Basic Research Foundation(2020A1515110156);H.H.gratefully acknowledge the support from the National Natural Science Foundation of China(62004129);A.N.and C.S.acknowledge the financial support from Nazarbayev University Grant(090118FD5326 and 110119FD4506);the targeted Program BR05236524,and social policy grants.

摘　　要：The benchmark tin oxide(SnO_(2))electron transporting layers(ETLs)have enabled remarkable progress in planar perovskite solar cell(PSCs).However,the energy loss is still a challenge due to the lack of“hidden interface”control.We report a novel ligand-tailored ultrafine SnO_(2) quantum dots(QDs)via a facile rapid room temperature synthesis.Importantly,the ligand-tailored SnO_(2) QDs ETL with multi-functional terminal groups in situ refines the buried interfaces with both the perovskite and transparent electrode via enhanced interface binding and perovskite passivation.These novel ETLs induce synergistic effects of physical and chemical interfacial modulation and preferred perovskite crystallization-directing,delivering reduced interface defects,suppressed non-radiative recombination and elongated charge carrier lifetime.Power conversion efficiency(PCE)of 23.02%(0.04 cm^(2))and 21.6%(0.98 cm^(2),V_(OC) loss:0.336 V)have been achieved for the blade-coated PSCs(1.54 eV E_(g))with our new ETLs,representing a record for SnO_(2) based blade-coated PSCs.Moreover,a substantially enhanced PCE(V_(OC))from 20.4%(1.15 V)to 22.8%(1.24 V,90 mV higher V_(OC),0.04 cm^(2) device)in the blade-coated 1.61 eV PSCs system,via replacing the benchmark commercial colloidal SnO_(2) with our new ETLs.

关 键 词：PEROVSKITE interface quantum 

分 类 号：O43[机械工程—光学工程]