TY - JOUR
T1 - Alkali Metal Doping for Improved CH3NH3PbI3 Perovskite Solar Cells
AU - Zhao, Wangen
AU - Yao, Zhun
AU - Yu, Fengyang
AU - Yang, Dong
AU - Liu, Shengzhong Frank
N1 - Funding Information:
The authors acknowledge support from the National University Research Fund (Grant No. GK261001009), the Changjiang Scholar and Innovative Research Team (Grant No. IRT_14R33), the Overseas Talent Recruitment Project (Grant No. B14041), the Chinese National 1000-talent plan program, the National Key Research Program of China (Grant No. 2016YFA0202403), the National Natural Science Foundation of China (Grant Nos. 61604090 and 61674098), and the Postdoctoral Fund of Shaanxi Province (Grant No. 2016BSHYDZZ37).
Publisher Copyright:
© 2017 The Authors. Published by WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
PY - 2018/2
Y1 - 2018/2
N2 - Organic–inorganic hybrid halide perovskites are proven to be a promising semiconductor material as the absorber layer of solar cells. However, the perovskite films always suffer from nonuniform coverage or high trap state density due to the polycrystalline characteristics, which degrade the photoelectric properties of thin films. Herein, the alkali metal ions which are stable against oxidation and reduction are used in the perovskite precursor solution to induce the process of crystallization and nucleation, then affect the properties of the perovskite film. It is found that the addition of the alkali metal ions clearly improves the quality of perovskite film: enlarges the grain sizes, reduces the defect state density, passivates the grain boundaries, increases the built-in potential (V bi), resulting to the enhancement in the power conversion efficiency of perovskite thin film solar cell.
AB - Organic–inorganic hybrid halide perovskites are proven to be a promising semiconductor material as the absorber layer of solar cells. However, the perovskite films always suffer from nonuniform coverage or high trap state density due to the polycrystalline characteristics, which degrade the photoelectric properties of thin films. Herein, the alkali metal ions which are stable against oxidation and reduction are used in the perovskite precursor solution to induce the process of crystallization and nucleation, then affect the properties of the perovskite film. It is found that the addition of the alkali metal ions clearly improves the quality of perovskite film: enlarges the grain sizes, reduces the defect state density, passivates the grain boundaries, increases the built-in potential (V bi), resulting to the enhancement in the power conversion efficiency of perovskite thin film solar cell.
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U2 - 10.1002/advs.201700131
DO - 10.1002/advs.201700131
M3 - Article
AN - SCOPUS:85038638092
SN - 2198-3844
VL - 5
JO - Advanced Science
JF - Advanced Science
IS - 2
M1 - 1700131
ER -