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Molecules
Volume 26
Issue 18
10.3390/molecules26185446
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Article

Synthesis of Lead-Free CaTiO3 Oxide Perovskite Film through Solution Combustion Method and Its Thickness-Dependent Hysteresis Behaviors within 100 mV Operation

by
Subin Lee
1,†,
Soyeon Kwak
1,†,
Taehyun Park
2,†,
Byoungchul Son
3,
Hyung Joong Yun
3,
Jaehyun Hur
2,* and
Hocheon Yoo
1,*
1
Department of Electronic Engineering, Gachon University, Seongnam 13120, Korea
2
Department of Chemical and Biological Engineering, Gachon University, Seongnam 13120, Korea
3
Research Center for Materials Analysis, Korea Basic Science Institute (KBSI), Daejeon 34133, Korea
*
Authors to whom correspondence should be addressed.
†
Co-first author, these authors contributed equally to this work.
Academic Editor: Minghao Yu
Molecules 2021, 26(18), 5446; https://doi.org/10.3390/molecules26185446
Received: 30 July 2021 / Revised: 31 August 2021 / Accepted: 2 September 2021 / Published: 7 September 2021
(This article belongs to the Special Issue 2D Materials: Synthesis and Energy Applications)
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Abstract

Perovskite is attracting considerable interest because of its excellent semiconducting properties and optoelectronic performance. In particular, lead perovskites have been used extensively in photovoltaic, photodetectors, thin-film transistors, and various electronic applications. On the other hand, the elimination of lead is essential because of its strong toxicity. This paper reports the synthesis of lead-free calcium titanate perovskite (CaTiO3) using a solution-processed combustion method. The chemical and morphological properties of CaTiO3 were examined as a function of its thickness by scanning electron microscopy, X-ray diffraction (XRD), atomic force microscopy, X-ray photoelectron spectroscopy, and ultraviolet–visible spectrophotometry. The analysis showed that thicker films formed by a cumulative coating result in larger grains and more oxygen vacancies. Furthermore, thickness-dependent hysteresis behaviors were examined by fabricating a metal-CaTiO3-metal structure. The electrical hysteresis could be controlled over an extremely low voltage operation, as low as 100 mV, by varying the grain size and oxygen vacancies. View Full-Text
Keywords: perovskite; CaTiO3; hysteresis; lead-free; orthorhombic; low voltage; oxygen vacancy perovskite; CaTiO3; hysteresis; lead-free; orthorhombic; low voltage; oxygen vacancy
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MDPI and ACS Style

Lee, S.; Kwak, S.; Park, T.; Son, B.; Yun, H.J.; Hur, J.; Yoo, H. Synthesis of Lead-Free CaTiO3 Oxide Perovskite Film through Solution Combustion Method and Its Thickness-Dependent Hysteresis Behaviors within 100 mV Operation. Molecules 2021, 26, 5446. https://doi.org/10.3390/molecules26185446

AMA Style

Lee S, Kwak S, Park T, Son B, Yun HJ, Hur J, Yoo H. Synthesis of Lead-Free CaTiO3 Oxide Perovskite Film through Solution Combustion Method and Its Thickness-Dependent Hysteresis Behaviors within 100 mV Operation. Molecules. 2021; 26(18):5446. https://doi.org/10.3390/molecules26185446

Chicago/Turabian Style

Lee, Subin, Soyeon Kwak, Taehyun Park, Byoungchul Son, Hyung J. Yun, Jaehyun Hur, and Hocheon Yoo. 2021. "Synthesis of Lead-Free CaTiO3 Oxide Perovskite Film through Solution Combustion Method and Its Thickness-Dependent Hysteresis Behaviors within 100 mV Operation" Molecules 26, no. 18: 5446. https://doi.org/10.3390/molecules26185446

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