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作 者:Zhixin Jin Bin-Bin Yu Min Liao Di Liu Jingwei Xiu Zheng Zhang Efrat Lifshitz Jiang Tang Haisheng Song Zhubing He
机构地区:[1]Department of Materials Science and Engineering,Shenzhen Key Laboratory of Full Spectral Solar Electricity Generation(FSSEG),Southern University of Science and Technology,No.1088,Xueyuan Rd.,Shenzhen 518055,Guangdong,China [2]Wuhan National Laboratory for Optoelectronics,Huazhong University of Science and Technology,Luoyu Road 1037,Wuhan 430074,Hubei,China [3]Academy for Advanced Interdisciplinary Studies,Southern University of Science and Technology,Shenzhen 518055,Guangdong,China [4]Schulich Faculty of Chemistry Russell Berrie Nanotechnology,Institute Solid State Institute,Technion Haifa,32000,Israel
出 处:《Journal of Energy Chemistry》2021年第3期414-421,共8页能源化学(英文版)
基 金:supported by the National Natural Science Foundation of China(NSFC)(No.61775091,21671160,51761145048,21833009);Natural Science Foundation of Shenzhen Innovation Committee(Nos.JCYJ20180504165851864);the Shenzhen Key Laboratory Project(No.ZDSYS201602261933302)。
摘 要:The conversion efficiencies reported for Tin(Sn)halide-based perovskite solar cells(PSCs)fall a large gap behind those of lead halide-based PSCs,mainly because of poor film quality of the former.Here we report an efficient strategy based on a simple secondary crystallization growth(SCG)technique to improve film quality for tin halide-based PSCs by applying a series of functional amine chlorides on the perovskite surface.They were discovered to enhance the film crystallinity and suppress the oxidation of Sn^(2+)remarkably,hence reduce trap state density and non-irradiative recombination in the absorber films.Furthermore,the SCG film holds the band levels matching better with carrier transport layers and herein favoring charge extraction at the device interfaces.Consequently,a champion device efficiency of 8.07% was achieved alo ng with significant enhancements in VOC and JSC,in contrast to 5.35% of the control device value.Moreover,the SCG film-based devices also exhibit superior stability comparing with the control one.This work explicitly paves a novel and general strategy for developing high performance lead-free PSCs.
关 键 词:Tin based perovskite solar cells Secondary crystallization growth Amine chloride Non-irradiative recombination Energy band levels matching
分 类 号:TM914.4[电气工程—电力电子与电力传动] TB383.2[一般工业技术—材料科学与工程]
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