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Research Article

Active-layer evolution and efficiency improvement of (CH3NH3)3Bi2I9-based solar cell on TiO2-deposited ITO substrate

Xinqian Zhang1,2Gang Wu1()Zhuowei Gu1Bing Guo1Wenqing Liu1Shida Yang1Tao Ye1Chen Chen1Weiwei Tu1Hongzheng Chen1()
State Key Laboratory of Silicon MaterialsMOE Key Laboratory of Macromolecular Synthesis and FunctionalizationDepartment of Polymer Science and EngineeringZhejiang UniversityHangzhou310027China
Department of Chemical EngineeringXinjiang Agriculture UniversityUrumqi830052China
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Abstract

We systematically investigated the development of film morphology and crystallinity of methyl-ammonium bismuth (III) iodide (MA3Bi2I9) through onestep spin-coating on TiO2-deposited indium tin oxide (ITO)/glass. The precursor solution concentration and substrate structure have been demonstrated to be critically important in the active-layer evolution of the MA3Bi2I9-based solar cell. This work successfully improved the cell efficiency to 0.42% (average: 0.38%) with the mesoscopic architecture of ITO/compact-TiO2/mesoscopic-TiO2 (meso-TiO2)/MA3Bi2I9/2, 2′, 7, 7′-tetrakis(N, N-di-4-methoxyphenylamino)-9, 9′spiro-bifluorene (spiro-MeOTAD)/MoO3/Ag under a precursor concentration of 0.45 M, which provided the probability of further improving the efficiency of the Bi3+-based lead-free organic–inorganic hybrid solar cells.

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Nano Research
Pages 2921-2930
Cite this article:
Zhang X, Wu G, Gu Z, et al. Active-layer evolution and efficiency improvement of (CH3NH3)3Bi2I9-based solar cell on TiO2-deposited ITO substrate. Nano Research, 2016, 9(10): 2921-2930. https://doi.org/10.1007/s12274-016-1177-8
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