Transparent Thin Films of Anatase Titania Nanoparticles with High Refractive Indices Prepared by Wet Coating Process

Title
Transparent Thin Films of Anatase Titania Nanoparticles with High Refractive Indices Prepared by Wet Coating Process
Authors
서영곤이현정김경곤이원목
Keywords
태양전지; 전자수송층; 이산화티타늄 나노입자; Anatase; hydrothermal reaction; inverse opal; solution process; thin film; titania nanoparticle; transparent
Issue Date
2010-04
Publisher
Molecular crystals and liquid crystals
Citation
VOL 520, 477-484
Abstract
We present a sol-gel derived anatase titania nanoparticle system which can be spin-coated to form thin films having high refractive index and excellent optical clarity. Stable titania suspensions were obtained through peptization of crude product in the presence of tetramethylammonium hydroxide. The particle sizes and morphologies were finely controlled by mild hydrothermal treatment at 200 ℃. Three titania suspensions obtained by different hydrothermal reaction time showed stable suspensions without significant flocculation, and subsequently spin coated on the glass substrates. Without calcinations step, the resulting films exhibited fairly good optical clearance and refractive indices as high as 2.05. Narrow dispersity of the particle size and the stability of titania suspension also enabled the fabrication of inverse opal structure by templating method which could be further utilized as various applications such as photonic bandgap materials and photoelectrode for solar cells.
URI
http://pubs.kist.re.kr/handle/201004/37750
ISSN
1563-5287
Appears in Collections:
KIST Publication > Article
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