The effect of the interfacial interaction between host-guest materials on energy transfer efficiency was investigated. Porous alumina membrane (PAM) was used as the host, and poly(N-vinylcarbazole) (PVK) and tris(8-hydroxyquinoline) aluminum (Alq3) were guest materials. The energy transfer between PVK and Alq3 within a PAM shows greatly enhanced efficiency compared with that of the bulk film. Such high efficiency is ascribed to a lowered formation of the fully overlapped form of the PVK excimer, which is induced by strong interaction between the pendant carbazole rings of PVK and the Al centers on the innerchannel surface of the PAM. The photoluminescence lifetimes of PVK become shorter with an increase in the Alq3 concentration in both films and PAMs, due to the energy transfer. The mean distance between PVK and Alq3 was estimated by using the Förster formula.
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Physical and Theoretical Chemistry
- Surfaces, Coatings and Films