Research Article


2016, 9(10): 2921–2930


Active-layer evolution and efficiency improvement of (CH3NH3)3Bi12I9-based solar cell on TiO2-deposited ITO substrate

Xinqian Zhang1,2, Gang Wu1 (*), Zhuowei Gu1, Bing Guo1, Wenqing Liu1, Shida Yang1, Tao Ye1, Chen Chen1, Weiwei Tu1, and Hongzheng Chen1 (*)

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1 State Key Laboratory of Silicon Materials, MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China
2 Department of Chemical Engineering, Xinjiang Agriculture University, Urumqi 830052, China

Keywords: methyl-ammonium bismuth (III) iodide, organic–inorganic hybrid solar cell, TiO2-depostied indium tin oxide (ITO) substrate, morphology and crystallinity, precursor solution concentration
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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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Active-layer evolution and efficiency improvement of (CH3NH3)3Bi12I9-based solar cell on TiO2-deposited ITO substrate. Nano Res. 2016, 9(10): 2921–2930

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