Active-layer evolution and efficiency improvement of (CH3NH3 3Bi2I9-based solar cell on TiO2-deposited ITO substrate
methyl-ammonium bismuth (III) iodide, organic–inorganic hybrid solar cell, TiO2-depostied indium tin oxide (ITO) substrate, morphology and crystallinity, precursor solution concentration
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.
Tsinghua University Press
Xinqian Zhang,Gang Wu,Zhuowei Gu,Bing Guo,Wenqing Liu,Shida Yang,Tao Ye,Chen Chen,Weiwei Tu,Hongzheng Chen, Active-layer evolution and efficiency improvement of (CH3NH3 3Bi2I9-based solar cell on TiO2-deposited ITO substrate. NanoRes.2016, 9(10): 2921–2930