Stable blue luminescence from mesoporous silica films

Jia Min Shieh*, An Thung Cho, Yi Fan Lai, Bau Tbng Dai, Fu-Ming Pan, Kuei Jung Chao

*Corresponding author for this work

Research output: Contribution to journalArticle

18 Scopus citations

Abstract

This study investigates how blue (∼460 nm) photoluminescence (PL) from mesoporous silica (MS) films depends on the nano-structure and chemistry of the pores. Reducing pore-size and pore-wall can increase the total area of the pore-surfaces, and therefore the number of radiative recombination centers, within the MS matrix, enhancing PL efficiency. Moreover, the number of silianol groups on pore-surfaces, which absorb moisture and degrade the PL of the MS films, is greatly reduced by silylating MS with hydrophobicity, yielding long-term stable luminescence. The quantum-efficiency of PL and the electroluminescence of the MS films are measured about 5.0 × 10 -4 and 1.0 × 10-66, respectively.

Original languageEnglish
Article number4
JournalElectrochemical and Solid-State Letters
Volume7
Issue number12
DOIs
StatePublished - 1 Dec 2004

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