Physisorption of Oxygen in SnO2 Nanoparticles for Perovskite Solar Cells

Waseem Ahmad; Detao Liu; Waqas Ahmad; Yafei Wang; Peng Zhang; Ting Zhang; Hualin Zheng; Zhi D. Chen; Shibin Li

doi:10.1109/JPHOTOV.2018.2877002

Physisorption of Oxygen in SnO₂ Nanoparticles for Perovskite Solar Cells

Waseem Ahmad, Detao Liu, Waqas Ahmad, Yafei Wang, Peng Zhang, Ting Zhang, Hualin Zheng, Zhi D. Chen, Shibin Li

Producción científica: Article › revisión exhaustiva

13 Citas (Scopus)

Resumen

Although SnO₂ is widely used in perovskite solar cells (PSCs) as the electron transport layer, there is still a need for a detailed investigation regarding the impact of physisorption on the performance of PSCs. Here, we report the role of physisorption of oxygen species from the ambient atmosphere in the oxidation states and defective oxides at the surface of SnO₂ nanoparticles for the performance of PSCs. The SnO₂ nanoparticle's thin film shows a higher oxidation state (Sn-O) and lower charge trap sites at an annealing temperature of 100 °C, and the SnO₂ film based PSCs yield an efficiency of 18.04%. The annealing process results in the gradual desorption of physically adsorbed oxygen species. Therefore, the annealing process of SnO₂ nanoparticle thin films in atmosphere is the key factor to control the oxidation states and defective oxides at the surface of SnO₂ nanoparticle thin films.

Idioma original	English
Número de artículo	8534422
Páginas (desde-hasta)	200-206
Número de páginas	7
Publicación	IEEE Journal of Photovoltaics
Volumen	9
N.º	1
DOI	https://doi.org/10.1109/JPHOTOV.2018.2877002
Estado	Published - ene 2019

Nota bibliográfica

Publisher Copyright:
© 2011-2012 IEEE.

Financiación

Manuscript received July 9, 2018; revised September 27, 2018; accepted October 15, 2018. Date of publication November 14, 2018; date of current version December 21, 2018. This work was supported in part by the National Natural Science Foundation of China under Grants 61421002, 61574029, 61471085, 61474015 and in part by the University of Kentucky. (Corresponding author: Shibin Li.) W. Ahmad, D. Liu, W. Ahmad, Y. Wang, P. Zhang, T. Zhang, H. Zheng, and S. Li are with the State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu 610054, China (e-mail:, [email protected]; [email protected]; 321emem@gmail. com; [email protected]; [email protected]; [email protected]; [email protected]; [email protected]).

Financiadores	Número del financiador
University of Kentucky
National Natural Science Foundation of China (NSFC)	61471085, 61574029, 61474015, 61421002
National Natural Science Foundation of China (NSFC)

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

Acceder al documento

10.1109/JPHOTOV.2018.2877002

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abstract = "Although SnO2 is widely used in perovskite solar cells (PSCs) as the electron transport layer, there is still a need for a detailed investigation regarding the impact of physisorption on the performance of PSCs. Here, we report the role of physisorption of oxygen species from the ambient atmosphere in the oxidation states and defective oxides at the surface of SnO2 nanoparticles for the performance of PSCs. The SnO2 nanoparticle's thin film shows a higher oxidation state (Sn-O) and lower charge trap sites at an annealing temperature of 100 °C, and the SnO2 film based PSCs yield an efficiency of 18.04\%. The annealing process results in the gradual desorption of physically adsorbed oxygen species. Therefore, the annealing process of SnO2 nanoparticle thin films in atmosphere is the key factor to control the oxidation states and defective oxides at the surface of SnO2 nanoparticle thin films.",

keywords = "Electron transport layer (ETL), X-ray photoelectron spectroscopy (XPS), oxidation states, oxygen adsorption, perovskite solar cells (PSCs)",

author = "Waseem Ahmad and Detao Liu and Waqas Ahmad and Yafei Wang and Peng Zhang and Ting Zhang and Hualin Zheng and Chen, \{Zhi D.\} and Shibin Li",

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AU - Zhang, Peng

AU - Zhang, Ting

AU - Zheng, Hualin

AU - Chen, Zhi D.

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AB - Although SnO2 is widely used in perovskite solar cells (PSCs) as the electron transport layer, there is still a need for a detailed investigation regarding the impact of physisorption on the performance of PSCs. Here, we report the role of physisorption of oxygen species from the ambient atmosphere in the oxidation states and defective oxides at the surface of SnO2 nanoparticles for the performance of PSCs. The SnO2 nanoparticle's thin film shows a higher oxidation state (Sn-O) and lower charge trap sites at an annealing temperature of 100 °C, and the SnO2 film based PSCs yield an efficiency of 18.04%. The annealing process results in the gradual desorption of physically adsorbed oxygen species. Therefore, the annealing process of SnO2 nanoparticle thin films in atmosphere is the key factor to control the oxidation states and defective oxides at the surface of SnO2 nanoparticle thin films.

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KW - X-ray photoelectron spectroscopy (XPS)

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KW - oxygen adsorption

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