Synthesis of Lead-Free CaTiO3 Oxide Perovskite Film through Solution Combustion Method and Its Thickness-Dependent Hysteresis Behaviors within 100 mV Operation
- Authors
- Lee, Subin; Kwak, Soyeon; Park, Taehyun; Son, Byoungchul; Yun, Hyung Joong; Hur, Jaehyun; Yoo, Hocheon
- Issue Date
- Sep-2021
- Publisher
- MDPI
- Keywords
- CaTiO3; Hysteresis; Lead-free; Low voltage; Orthorhombic; Oxygen vacancy; Perovskite
- Citation
- Molecules, v.26, no.18
- Journal Title
- Molecules
- Volume
- 26
- Number
- 18
- URI
- https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/82322
- DOI
- 10.3390/molecules26185446
- ISSN
- 1420-3049
- 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 metalCaTiO3-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. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.
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Collections - IT융합대학 > 전자공학과 > 1. Journal Articles
- 공과대학 > 화공생명공학과 > 1. Journal Articles
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