RF sputtered NiOx as hole transport layer for CH3NH3PbI3 perovskite solar cells

Masatoshi Yanagida^a^,^b, Namrta Pant^b, Yasuhiro Shirai^a, Kenjiro Miyano^a

^aNational Institute for Materials Science (NIMS), Center for Green Research on Energy and Environmental Materials, Photovoltaic Materials Group, Japan, Japan

^bInterdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi, 4-3-11 Takeda, Kofu, Yamanashi 400-8511, Japan

NIPHO
Proceedings of International Conference on Perovskite Thin Film Photovoltaics and Perovskite Photonics and Optoelectronics (NIPHO20)

Sevilla, Spain, 2020 February 23rd - 25th

Organizer: Hernán Míguez

Poster, Masatoshi Yanagida, 086
Publication date: 25th November 2019

Radio-frequency (RF) sputtered NiO_x has been investigated as as hole transport layer for the CH₃NH₃PbI₃ perovskite (PVK) solar cells. ^1-4 We prepared NiO_x layer by using NiO as the sputtering target. The optical and surface property of NiO_x films depends on the sputtering conditions such as Ar gas pressure, the sputtering power, and so on.^2,3 The higher sputtering power negatively shift the maximum potential of valence band in NiO_x. From XPS results, the amount of OH groups on the surface influences on the photovoltaic properties of PVK solar cells.^2,3 Recently, we also showed the NiOx influenced on the film growth of PVK, especially for the growth of PbI₂ crystal in PVK.⁴ We comprehensively report the stability test of PVK solar cells based on NiO_x as hole transport layer.¹

References:

[1] Islam, Md. B; Yanagida, M.; Shirai, Y.; Nabetani,Y.; Miyano,K. Highly Stable Semi-Transparent MAPbI3 Perovskite Solar Cells with Operational Output for 4000 h. Sol. Energy Mater. Sol. Cell. 2019, 195, 323-329.

[2] Islam, Md. B; Pant, N.; Yanagida, M.; Shirai, Y.; Miyano, K. Effect of Hydroxyl Groups in NiO x on the Open Circuit Voltage of Lead Iodide Perovskite Solar Cells, Jpn. J. Appl. Phys., 2018, 57, 08RE06.

[3] Islam, Md. B.; Yanagida, M.; Shirai,Y.; Nabetani, Y.; Miyano, K. NiOx Hole Transport Layer for Perovskite Solar Cells with Improved Stability and Reproducibility. ACS Omega 2017, 2, 2291-2299.

[4] Yanagida, M.; Shimomoto, L.; Shirai, Y.; Miyano, K. Effect of Carrier Transport in NiO on the Photovoltaic Properties of Lead Iodide Perovskite Solar Cells. Electrochemistry, 2017, 85, 231-235.

[5] N. Pant, A. Kulkarni, M. Yanagida, Y. Shirai, and K. Miyano, Investigating the Growth of CH3NH3PbI3 Thin Films on RF-Sputtered NiOx for Inverted Planar Perovskite Solar Cells: Effect of CH3NH3+ Halide Additives versus CH3NH3+ Halide Vapor Annealing, Adv. Mat. Interfaces, 2019, 1901748.

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