TY  - JOUR
AU  - Zhang, Xinqian
AU  - Wu, Gang
AU  - Gu, Zhuowei
AU  - Guo, Bing
AU  - Liu, Wenqing
AU  - Yang, Shida
AU  - Ye, Tao
AU  - Chen, Chen
AU  - Tu, Weiwei
AU  - Chen, Hongzheng
PY  - 2016
TI  - Active-layer evolution and efficiency improvement of (CH3NH3)3Bi2I9-based solar cell on TiO2-deposited ITO substrate
JO  - Nano Research
SN  - 1998-0124
SP  - 2921
EP  - 2930
VL  - 9
IS  - 10
AB  - 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.
UR  - https://doi.org/10.1007/s12274-016-1177-8
DO  - 10.1007/s12274-016-1177-8