Reflectance modulation using SiO2/TiO2 multilayer structures prepared by sol-gel spin coating process for optical applications

被引：26

作者：

Dubey, R. S. ^{[1
]}

Ganesan, V. ^{[2
]}

机构：

[1] Swarnandhra Coll Engn & Technol, Dept Nanotechnol, Adv Res Lab Nanomat & Devices, Narsapur, AP, India

[2] Indore Ctr, UGC DAE Consortium Sci Res, Univ Campus,Khandwa Rd, Indore, MP, India

来源：

SUPERLATTICES AND MICROSTRUCTURES | 2017年 / 111卷

关键词：

Dielectric multilayers; Optical filters; Sol-gel process; Spin coating; Reflectance; PHOTONIC CRYSTALS; FILMS;

D O I：

10.1016/j.spmi.2017.08.011

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Passive devices made of SiO2/TiO2 bilayers have been demanded for the molding of electromagnetic waves in optical waveguides, microcavities, solar cells, sensors and so on. Here, we present the fabrication and characterization of SiO2/TiO2 multilayer structures as reflectors. The refractive indices were found to be 1.43 & 2.0 with thicknesses 230 & 70 nm corresponding to the SiO2 and TiO2 films respectively. AFM surface topography study showed little bit large surface roughness of the TiO2 as compared to SiO2 film due to its large grain size. The corresponding reflectance enhancement was noticed with the increased number of bilayers of SiO2/TiO2 films. Furthermore, six alternate layers of SiO2/TiO2 demonstrated the as much as 78% reflectance in the near-infrared wavelength range. (C) 2017 Elsevier Ltd. All rights reserved.

引用

页码：1099 / 1103

页数：5

共 9 条

[1]

Auguie Baptiste, ACS PHOTONICS

[2] Rapid Sol-Gel Fabrication of High-Quality Thin-Film Stacks on Planar and Curved Substrates [J].

Barhoum, Moussa ;

Morrill, Jacob M. ;

Riassetto, David ;

Bartl, Michael H. .

CHEMISTRY OF MATERIALS, 2011, 23 (23) :5177-5184

[3] SiO2/TiO2 omnidirectional reflector and microcavity resonator via the sol-gel method [J].

Chen, KM ;

Sparks, AW ;

Luan, HC ;

Lim, DR ;

Wada, K ;

Kimerling, LC .

APPLIED PHYSICS LETTERS, 1999, 75 (24) :3805-3807

[4] Nanoparticle-based one-dimensional photonic crystals [J].

Colodrero, Silvia ;

Ocana, Manuel ;

Miguez, Hernan .

LANGMUIR, 2008, 24 (09) :4430-4434

[5] Photonic crystals from ordered mesoporous thin-film functional building blocks [J].

Fuertes, Maria Cecilia ;

Lopez-Alcaraz, Francisco Javier ;

Marchi, Maria Claudia ;

Troiani, Horacio E. ;

Luca, Vittorio ;

Miguez, Hernan ;

Arturo Soler-Illia, Galo Juan de Avila .

ADVANCED FUNCTIONAL MATERIALS, 2007, 17 (08) :1247-1254

[6] Reflectance modulation of transparent multilayer thin films for energy efficient window applications [J].

Han, Koohee ;

Kim, Jung Hyeun .

MATERIALS LETTERS, 2011, 65 (15-16) :2466-2469

[7] Optical filters from SiO2 and TiO2 multi-layers using sol-gel spin coating method [J].

Hinczewski, DS ;

Hinczewski, M ;

Tepehan, FZ ;

Tepehan, GG .

SOLAR ENERGY MATERIALS AND SOLAR CELLS, 2005, 87 (1-4) :181-196

[8] Optical, electrical and dielectric properties of TiO2-SiO2 films prepared by a cost effective sol-gel process [J].

Vishwas, M. ;

Rao, K. Narasimha ;

Gowda, K. V. Arjuna ;

Chakradhar, R. P. S. .

SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY, 2011, 83 (01) :614-617

[9] Synthesis of reflective TiO2/SiO2 multilayer flakes for solar cell application [J].

Yasuda, Takashi ;

Ikeda, Shuhei ;

Furukawa, Shoji .

DYES AND PIGMENTS, 2010, 86 (03) :278-281

← 1 →