High-Resolution Study of TiO2 Contact Layer Thickness on the Performance of over 800 Perovskite Solar Cells

Laxman Gouda; Kevin J. Rietwyk; Jiangang Hu; Adi Kama; Adam Ginsburg; Maayan Priel; David A. Keller; Shay Tirosh; Simcha Meir; Ronen Gottesman; Arie Zaban

doi:10.1021/acsenergylett.7b00718

High-Resolution Study of TiO₂ Contact Layer Thickness on the Performance of over 800 Perovskite Solar Cells

Laxman Gouda, Kevin J. Rietwyk, Jiangang Hu, Adi Kama, Adam Ginsburg, Maayan Priel, David A. Keller, Shay Tirosh, Simcha Meir, Ronen Gottesman, Arie Zaban

Department of Chemistry

Bar-Ilan University

Research output: Contribution to journal › Article › peer-review

12 Scopus citations

Abstract

In this Letter, we systematically explore the influence of TiO₂ thickness with nanometric variations over a range of 20-600 nm on the photovoltaic parameters (open-circuit voltage, short circuit current, fill-factor, and power conversion efficiency) of CH₃NH₃PbI₃-based solar cells. We fabricate several sample libraries of 13 × 13 solar cells on large substrates with spatial variations in the thickness of the TiO₂ layers while maintaining similar properties for the other layers. We show that the optimal thickness is ∼50 nm for maximum performance; thinner layers typically resulted in short-circuited cells, whereas increasing the thickness led to a monotonic decrease in performance. Furthermore, by assuming a fixed bulk resistivity of TiO₂, we were able to correlate the TiO₂ thickness to the series and shunt resistances of the devices and model the variation in the photovoltaic parameters with thickness using the diode equation to gain quantitative insights.

Original language	English
Pages (from-to)	2356-2361
Number of pages	6
Journal	ACS Energy Letters
Volume	2
Issue number	10
DOIs	https://doi.org/10.1021/acsenergylett.7b00718
State	Published - 13 Oct 2017

Bibliographical note

Publisher Copyright:
© 2017 American Chemical Society.

Funding

The research of J.H and L.G has received funding from the European Union Seventh Framework Program [FP7/2007-2013] under Grant Agreement 316494. K.J.R received funding from the European Union’s Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie Grant Agreement No. 659774. We thank Dr. Yaniv Bouhadana, Dr. Assaf Y. Anderson, and Dr. Hannah-Noa Barad for their assistance in performing the fabrication and high-throughput characterization of the materials and devices.

Funders	Funder number
European Union Seventh Framework Program
European Union’s Horizon 2020
FP7/2007	316494
Horizon 2020 Framework Programme	659774

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1021/acsenergylett.7b00718

Cite this

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abstract = "In this Letter, we systematically explore the influence of TiO2 thickness with nanometric variations over a range of 20-600 nm on the photovoltaic parameters (open-circuit voltage, short circuit current, fill-factor, and power conversion efficiency) of CH3NH3PbI3-based solar cells. We fabricate several sample libraries of 13 × 13 solar cells on large substrates with spatial variations in the thickness of the TiO2 layers while maintaining similar properties for the other layers. We show that the optimal thickness is ∼50 nm for maximum performance; thinner layers typically resulted in short-circuited cells, whereas increasing the thickness led to a monotonic decrease in performance. Furthermore, by assuming a fixed bulk resistivity of TiO2, we were able to correlate the TiO2 thickness to the series and shunt resistances of the devices and model the variation in the photovoltaic parameters with thickness using the diode equation to gain quantitative insights.",

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AU - Kama, Adi

AU - Ginsburg, Adam

AU - Priel, Maayan

AU - Keller, David A.

AU - Tirosh, Shay

AU - Meir, Simcha

AU - Gottesman, Ronen

AU - Zaban, Arie

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