Investigation of sol-gel and nanoparticle-based NiOx hole transporting layer for high-performance planar perovskite solar cells

• Published in: Journal of alloys and compounds Vol. 797; pp. 1018 - 1024
• Main Authors: Seo, You-Hyun, Cho, In Hwa, Na, Seok-In
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 15-08-2019; Elsevier BV
• Subjects: Dependence; Hole transporting layer; Luminous intensity; Nanoparticles; Nickel oxide; Nickel oxides; Perovskites; Photoelectrons; Photoluminescence; Photovoltaic cells; Planar perovskite solar cells; Scanning electron microscopy; Sol-gel; Sol-gel processes; Solar cells; Spectrum analysis; Transportation services; X ray photoelectron spectroscopy; Nanoparticles; Hole transporting layer; Planar perovskite solar cells; Sol-gel; Nickel oxide
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/j.jallcom.2019.05.204

We conduct a comprehensive study on and comparison of sol-gel and nanoparticles (NPs)-based nickel oxide hole-transporting layer (HTL) for high-performance planar perovskite solar cells (PSCs). The characteristics and film properties of sol-gel and NPs were systemically investigated using ultraviolet photoelectron spectroscopy (UPS), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), and photoluminescence (PL), and its effect on device-performance was also examined using J-V characteristics, quantum-efficiency, and the VOC dependence of the light intensity. Through this comparison of two types of HTL and their device-performances, these studies can provide sufficient and robust information for nickel oxide-based PSCs, and furthermore, the overall results and discussions can be useful for high-performance PSCs.
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•NiOx sol-gel and nanoparticles (NPs) as a hole-transporting layer were compared.•A higher PCE was obtained in NiOx sol-gel (17.365%) than that of NPs (16.110%).•Sol-gel films provide better charge transport for efficient device-performance.