Citation: TAN Man-Lin, YANG Shuai, MA Qing, FU Dong-Ju, LI Dong-Shuang, WANG Xiao-Wei, ZHANG Wei-Li, CHEN Jian-Jun, ZHANG Hua-Yu. Doping Modification of Stannic Perovskite Based Thin Films for Solar Cell Applications[J]. Chinese Journal of Inorganic Chemistry, ;2016, 32(9): 1565-1571. doi: 10.11862/CJIC.2016.209 shu

Doping Modification of Stannic Perovskite Based Thin Films for Solar Cell Applications

1.
Research Institute of Tsinghua University in Shenzhen, Shenzhen, Guangdong 518057, China
2.
Harbin Institute of Technology Shenzhen Graduate School, Shenzhen, Guangdong 518055, China

Corresponding author: TAN Man-Lin, tanml@tsinghua-sz.org
Received Date: 19 April 2016
Revised Date: 28 July 2016

Figures(9)

The plumbic and stannic perovskite solar cell materials such as CH₃NH₃SnI₃ and CH₃NH₃PbI₃ were obtained by one step preparation with the surface morphology, microstructure, spectral absorption and device performance were investigated respectively. The spectral absorption of stannic perovskite material were found to expand wider and have an obvious red-shift compared to plumbic perovskite, with the absorption edge increased from 800 to 950 nm and the optical band gap reduced from 1.45 to 1.21 eV. But the conversion efficiency of stannic perovskite solar cell demonstrated significantly lower than that of plumbic perovskite, 2.05% and 6.71% respectively, due to a downshift of absorption intensity. However, bromine (Br) doping could broaden the band gap and thus give rise to the open circuit voltage of solar cell device accordingly. As the doping content increased from 0 to be totally replacement of iodine, the color of stannic perovskite turned gradually from dark brown to yellow, and the optical band gap increased up to 1.95 eV. At the same time, a blue shift of spectra absorption was observed, reducing from 950 to 650 nm. Noteworthy is that the solar cell conversion efficiency increased from initial 2.05% to 2.94% at the doping content of 0.5.
- perovskite solar cell,
- stannic perovskite,
- doping modification
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沈阳化工大学材料科学与工程学院沈阳 110142