INORGANIC MATERIALS AND CERAMIC MATRIX COMPOSITES |
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SnO2 Thin Film Prepared by Atomic Layer Deposition Technology and Its Effect on the Performance of Perovskite Solar Cells |
MING Shuaiqiang1,2,3, WANG Zhejia3, WU Lujie1,4, FENG Jiaheng3, GAO Yazeng1,2, LU Weier1,2, XIA Yang1,2
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1 Microelectronic Instrument and Equipment Research Center, Institute of Microelectronics, Chinese Academy of Sciences, Beijing 100029, China 2 School of Microelectronics, University of Chinese Academy of Sciences, Beijing 101407, China 3 Jiaxing Kemin Electronic Equipment Technology Co., Ltd., Jiaxing 314022,Zhejiang, China 4 School of Science,Beijing Jiaotong University, Beijing 100044, China |
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Abstract In this work, tin oxide (SnO2) thin film was prepared through atomic layer deposition technology with monocrystalline silicon as substrate, te-trakis (dimethylamino) tin and water as the precursor sources. Its optical, electrical properties and application in perovskite solar cell devices were characterized. Through adjusting the temperature of substrates, the effect of deposition temperature on SnO2 film deposition rate, and electrical and optical properties were studied in detail, and the performance of perovskite solar cells was analyzed. The results indicate that with tetrakis (dimethylamino) tin and water as precursors, the deposition rate decreases gradually with the increase of temperature, and the atomic layer deposition temperature window is between 120 ℃ and 250 ℃; the refractive index also increases with temperature. As the temperature increases gradually, the band gap decreases; the higher the deposition temperature is, the higher the surface oxygen vacancy concentration is. The SnO2 thin film deposited at 160 ℃ was used to prepare the perovskite solar cell device, which obtained a champion efficiency (18.68%), with a cut-off voltage of 1.077 V, a short-circuit current density of 23.67 mA/cm2 and a fill factor of 73.3%. The device has less hysteresis effect.
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Published:
Online: 2022-04-07
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Fund:National Key R & D Program of China (2018YFF0109100) and the National Natural Science Foundation of China (61427901). |
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