Improved Photoluminescence Lifetime of Organic Emissive Materials Embedded in Organic-Inorganic Hybrid Thin Films Fabricated by Sol-Gel Method Using Tetraethoxysilane

Abstract

We fabricated organic-inorganic hybrid films by a sol-gel method using Tetraethoxysilane (TEOS). It is found that water-soluble organic emissive materials should be used, because water must be added to TEOS for a sol-gel reaction. The acid catalyst is better than the base catalyst when TEOS is used. The organic-inorganic hybrid films reveal a fine antioxidant effect, because most of the organic emissive materials are surrounded by SiO₂. This means that hybrid films have fine resistance to moisture and an antioxidant effect. Consequently, they lead to a strong sealing effect, resulting in the long operation lifetime of photoluminescence (PL) emissions.

Keywords:

• Organic-inorganic hybrid films
• sol-gel
• TEOS
• photoluminescence