Solid-state photochromic device based on nanocrystalline TiO2 functionalized with electron donor-acceptor species.
In this Communication, we report on a new type of solid-state photochromic device, S-TiO(2)-A, which is based on electron-transfer processes involving a molecular sensitizer (S) and an electron acceptor (A) coadsorbed onto the surface of nanocrystalline TiO(2). The electron-transfer process is mediated by the semiconductor conduction band and leads to a long-lived charge-separated state S(+)/A(-). The lifetime of this state can be controlled by oxygen diffusion through a polymeric coating deposited on the device.
Biancardo
Matteo
M
Dipartimento di Chimica, Università di Ferrara, via L. Borsari 46, 44100 Ferrara, Italy.
Argazzi
Roberto
R
Bignozzi
Carlo A
CA