Demonstration of the infrared detection of pyroelectric SnO₂–Fe₂O₃ composite ﬁlms

Authors

Arvin Jay Escolano ⋅ PH Materials Science and Engineering Program, University of the Philippines Diliman
Raymund Veloz ⋅ PH Materials Science and Engineering Program, University of the Philippines Diliman
Elmer Estacio ⋅ PH National Institute of Physics, University of the Philippines Diliman
Arnel Salvador ⋅ PH National Institute of Physics, University of the Philippines Diliman
Armando Somintac ⋅ PH National Institute of Physics, University of the Philippines Diliman

Abstract

The infrared (IR) detection capability of SnO₂–Fe₂O₃ composite films is demonstrated. The samples were fabricated on glass substrates via spray pyrolysis at deposition temeratures of 240°C, 300°C, and 370°C. Raman spectroscopy confirmed the presence of SnO₂ and Fe₂O₃ phases in the composite films. UV-Vis spectroscopy revealed that a variation of band gap was evident and was attributed to the segregation of the phases during deposition. It also showed that increasing the deposition temperature widens the direct band gap of the composite, approaching that of crystalline SnO₂. Lastly, IR detection was demonstrated with the periodic illumination with IR radiation. The voltage response of the composite showed a maximum peak at 46.52 µV, due to the primary pyroelectric effect, and a plateau at 27.95 µV, due to the secondary pyroelectric effect.

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Issue

2018: Proceedings of the 36th Samahang Pisika ng Pilipinas Physics Conference

Article ID

SPP-2018-3C-05

Section

Condensed Matter Physics and Materials Science

Published

2018-05-30

How to Cite

[1]

AJ Escolano, R Veloz, E Estacio, A Salvador, and A Somintac, Demonstration of the infrared detection of pyroelectric SnO2–Fe2O3 composite ﬁlms, Proceedings of the Samahang Pisika ng Pilipinas 36, SPP-2018-3C-05 (2018). URL: https://proceedings.spp-online.org/article/view/SPP-2018-3C-05.