Citation: TIAN Hui, XIONG Qi, LIU Peng, ZHANG Jing, HAN Lei, ZHANG Yu-Hao, ZHENG Yong-Jin, WU Li-Shuang, ZHU Yue-Jin. Ti⁴⁺ Doped Perovskite for Efficient Perovskite Solar Cells by Grain Boundary Passivation[J]. Chinese Journal of Inorganic Chemistry, ;2018, 34(9): 1710-1718. doi: 10.11862/CJIC.2018.200 shu

Ti⁴⁺ Doped Perovskite for Efficient Perovskite Solar Cells by Grain Boundary Passivation

Department of Microelectronic Science and Engineering, Faculty of Science, Ningbo University, Ningbo, Zhejiang 315211, China

Corresponding author: ZHANG Jing, zhangjing@nbu.edu.cn ZHU Yue-Jin, zhuyuejin@nbu.edu.cn
Received Date: 31 March 2018
Revised Date: 11 June 2018

Figures(5)

The grain boundaries defect is solved by titanium ion (Ti⁴⁺) doping. Ti⁴⁺ has small radius which is proved to form at the grain boundary of polycrystalline perovskite. By control doping of titanium ion, grain size become more uniform, which leads to more continuous perovskite thin film. Studies suggest that the defects in grain boundary of polycrystalline perovskite are passivated by doping Ti⁴⁺, which results in the trap states concentration greatly decrease. And experimental test clearly exhibits more excellent performance of short-circuit current density (J_SC=22.3 mA·cm^-2), open-circuit voltage (V_OC=1.10 V), fill factor (FF=72.4%) and photovoltaic conversion efficiency (PCE=17.4%) with low amount Ti⁴⁺ doping compared with pure planar heterojunction perovskite solar cells (AM1.5).
- perovskite solar cells,
- Ti⁴⁺ doping,
- defect states,
- grain boundary
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Ti4+ Doped Perovskite for Efficient Perovskite Solar Cells by Grain Boundary Passivation

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Ti⁴⁺ Doped Perovskite for Efficient Perovskite Solar Cells by Grain Boundary Passivation