Modified Oligothiophenes with High Photo- and Electroluminescence Efficiencies (pages 1375–1379)
G. Barbarella, L. Favaretto, G. Sotgiu, M. Zambianchi, V. Fattori, M. Cocchi, F. Cacialli, G. Gigli and R. Cingolani
Version of Record online: 3 NOV 1999 | DOI: 10.1002/(SICI)1521-4095(199911)11:16<1375::AID-ADMA1375>3.0.CO;2-D
Oligothiophenes with enhanced light emission properties in the solid state are presented. Historically, light-emitting diodes (LEDs) based on oligothiophenes have shown poor efficiency, a low photoluminescence quantum yield in the solid state contributing to this behavior. Here, it is reported that new polyfunctionalized oligothiophenes display photoluminescence quantum efficiencies in the solid state of up to 37 %, a value comparable to that of organic luminescent materials, such as poly(p-phenylenevinylene), currently under investigation for application in LEDs.