Journal
NANO RESEARCH
Volume 9, Issue 10, Pages 2921-2930Publisher
TSINGHUA UNIV PRESS
DOI: 10.1007/s12274-016-1177-8
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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Funding
- National Basic Research Program of China [2014CB643503]
- National Natural Science Foundation of China [91233114, 51373151, 51261130582]
- Zhejiang Province Natural Science Foundation [LR15E030001]
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We systematically investigated the development of film morphology and crystallinity of methyl-ammonium bismuth (III) iodide (MA(3)Bi(2)I(9)) 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 MA(3)Bi(2)I(9)-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)/MA(3)Bi(2)I(9)/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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