Mechanistic insight into the non-hydrolytic sol-gel process of tellurite glass films to attain a high transmission

Xuanzhao Pan, Jiangbo Zhao, Gujie Qian, Xiaozhou Zhang, Yinlan Ruan, Andrew Abell, Heike Ebendorff-Heidepriem

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

The development of amorphous films with a wide transmission window and high refractive index is of growing significance due to the strong demand of integrating functional nanoparticles for the next-generation hybrid optoelectronic films. High-index TeO2-based glass films made via the sol-gel process are particularly suitable as their low temperature preparation process promises high compatibility with a large variety of nanoparticles and substrates that suffer from low thermal stability. However, due to the lack of in-depth understanding of the mechanisms of the formation of undesired metallic-Te (highly absorbing species) in the films, the preparation of high-transmission TeO2-based sol-gel films has been severely hampered. Here, by gaining insight into the mechanistic chemistry of metallic-Te formation at different stages during the non-hydrolytic sol-gel process, we identify the chemical route to prevent the generation of metallic-Te in a TeO2-based film. The as-prepared TeO2-based film exhibits a high transmission that is close to the theoretical limit. This opens up a new avenue for advancing the performance of hybrid optoelectronic films via incorporating a large variety of unique nanoparticles.

Original languageEnglish
Pages (from-to)2404-2415
Number of pages12
JournalRSC Advances
Volume10
Issue number4
DOIs
Publication statusPublished - 13 Jan 2020

Bibliographical note

This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence CC BY-NC

Keywords

  • amorphous films
  • high refractive index
  • hybrid optoelectronic films

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