Yl. Hong et al., ELECTROLUMINESCENCE FROM A POLYESTER CONTAINING OLIGOTHIOPHENES IN THE MAIN-CHAIN, ENHANCED BY A DIIMIDE ELECTRON-TRANSPORT AGENT, Synthetic metals, 82(3), 1996, pp. 189-191
Photoluminescence spectra in solution and thin films were measured for
a polyester with isolated dimethoxyquaterthiophene units in the main
chain. Light-emitting diodes were fabricated using indium-tin oxide (I
TO)/polyester/Al sandwiches. N,N-dilauryl naphthalene tetracarboxylic
acid diimide, added as an electron transport agent, gave improved perf
ormance. The emitted light was orange and had lambda(max) 595 nm. Devi
ces constructed with a 240 nm thick polymer film had an emission thres
hold of about 15 V and 4 mA cm(-2).