Conductive Distributed Bragg Reflector Fabricated at Low Temperature

Abstract:

A conductive DBR electrode fabricated using the single Indium tin oxide (ITO) conductive material is proposed. The high refractive index of the dense ITO film was achieved by RF sputtering at room temperature and the porous ITO film with low refractive index was prepared by applying supercritical CO₂ (SCCO₂) treatment at 60 °C on gel-coated ITO thin films. The index contrast of the ITO bilayers was higher than 0.5 at a wavelength of 550 nm. In addition, small deviations on the optical thickness of the ITO bilayers were observed during the DBR stacking processes. For the DBR comprising 4 periods ITO bilayers, the reflectance and sheet resistance of 72.8% and 35 Ω/ were achieved.

• Periodical: Applied Mechanics and Materials (Volume 421)
• Pages: 364-368
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.421.364
• Online since: September 2013
• Authors: Ann Kuo Chu, Wei Chen Tien
• Keywords: Distributed Bragg Reflector (DBR), Indium Tin Oxide (ITO), Porous, Supercritical CO₂ (SCCO₂)

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