A Facile Ionic Compound Modification of SnO2 ETL to Enhance the Performance Perovskite Solar Cell

Ching Chang Lin^a^,^b, Takurou N. Murakami^b, Masayuki Chikamatsu^b, Takeru Bessho^c, Hiroshi Segawa^a^,^c

^aUniversity of Tokyo, Japan, Japan

^bResearch Center for Photovoltaics, National Institute of Advanced Industrial Science and Technology, Japan

^cResearch Center for Advanced Science and Technology (RCAST), The University of Tokyo, Japan, Japan

Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics
Proceedings of Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics (IPEROP20)

Tsukuba-shi, Japan, 2020 January 20th - 22nd

Organizers: Michio Kondo and Takurou Murakami

Poster, Ching Chang Lin, 072
Publication date: 14th October 2019

Perovskite solar cells are one of the most promising photovoltaic technologies and have made extraordinary advances in production efficiency and simple processes. The possibility of replacing the extensively used silicon-based solar cell nowadays by perovskite solar cell has triggered a surge of interest in researching these unprecedented photovoltaics. Defects in perovskite solar cells play a crucial role in determining the final performance of the device. Large defect density in perovskite solar cells has a destructive effect on device performance and modification of electron transport material is therefore considered as a feasible solution to this problem since it can not only passivate defects but also enhance the electrical property of electron transport material. Herein, a facile ionic compound modification was applied where the different amount of sodium chloride was physically blended in tin oxide colloid solution to improve performance and stability. The sodium chloride modified tin oxide was utilized as electron transport material to fabricate perovskite solar cells. Throughout the experiment, 25 mM sodium chloride modified tin oxide as an electron transport layer was found that could considerably enhance the performance of the device compared to the pristine tin oxide. The conductivity of the as-spun sodium chloride modified tin oxide layer was enhanced because of its dense and well-distributed film quality. Defect density in perovskite layer was also reduced due to the enlarged perovskite crystal and a suitable amount of non-reacted lead iodide passivating grain boundaries of perovskite crystal when a portion of sodium chloride was dissolved in the perovskite precursor solution. Both the enhanced conductivity of the electron transport layer and reduced defect density in the perovskite layer led to a significantly promoted electron transfer efficiency from the perovskite layer to the electron transport layer. The power conversion efficiency of perovskite solar cell displayed an 8.84% remarkable improvement from 18.66 ± 0.38% to 20.31 ± 0.31% on average and an 8.39% improvement from 19.08% to 20.68% in champion devices when 25 mM sodium chloride modified tin oxide as electron transport layer was used in comparison with pristine tin oxide. This facile sodium chloride modification strategy to tin oxide had achieved great success and may provide an opportunity for improving the performance and stability of perovskite solar cells.

References:

[1] Tang, Z., Bessho, T., Awai, F. et al., Hysteresis-free perovskite solar cells made of potassium-doped organometal halide perovskite., Sci Rep 7, 2017, 12183

[2] Feng Gao, Yang Zhao, Xingwang Zhang, and Jingbi You, Recent Progresses on Defect Passivation toward Efficient Perovskite Solar Cells, Adv. Energy Mater. 2019, 1902650

[3] Qi Jiang, Liuqi Zhang, Haolin Wang, Xiaolei Yang, Junhua Meng, Heng Liu, Zhigang Yin, Jinliang Wu, Xingwang Zhang and Jingbi You, Enhanced electron extraction using SnO2 for high-efficiency planar-structure HC(NH2)2PbI3-based perovskite solar cells, Nat. Energy. 2, 2017, 16177

[4] Michael Saliba, Taisuke Matsui, Ji-Youn Seo, Konrad Domanski, Juan-Pablo Correa-Baena, Mohammad Khaja Nazeeruddin, Shaik M. Zakeeruddin, Wolfgang Tress, Antonio Abate, Anders Hagfeldt and Michael Grätzel, Cesium-containing triple cation perovskite solar cells: improved stability, reproducibility and high efficiency, Energy Environ. Sci. 9, 2016, 1989–1997.

Acknowledgements:

This work was supported by the New Energy and Industrial Technology Development Organization (NEDO) of Japan.

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