Carbazole–pyrene-based organic emitters for electroluminescent device
摘要:
Carbazole-pyrene-based compounds were synthesized and fully characterized. Their photoluminescence properties were studied. Fluorescence quantum yield was improved dramatically by inserting pyrene as electron-acceptor. Blending 9-(3-(2-(1-(2-(3-(9H-carbazol-9-yl)-9-p-tolyl-9H-carbazol-6-yl)ethynyl)pyren-6-yl)ethynyl)-9-p-tolyl-9H-carbazol-6-yl)-9H-carbazole (16) with poly(N-vinylcarbazole) (PVK), simplified electroluminescent (EL) device with green emission was fabricated. Maximum luminance reached 1000 cd/m(2). (c) 2005 Elsevier B.V. All rights reserved.
Carbazole–pyrene-based organic emitters for electroluminescent device
摘要:
Carbazole-pyrene-based compounds were synthesized and fully characterized. Their photoluminescence properties were studied. Fluorescence quantum yield was improved dramatically by inserting pyrene as electron-acceptor. Blending 9-(3-(2-(1-(2-(3-(9H-carbazol-9-yl)-9-p-tolyl-9H-carbazol-6-yl)ethynyl)pyren-6-yl)ethynyl)-9-p-tolyl-9H-carbazol-6-yl)-9H-carbazole (16) with poly(N-vinylcarbazole) (PVK), simplified electroluminescent (EL) device with green emission was fabricated. Maximum luminance reached 1000 cd/m(2). (c) 2005 Elsevier B.V. All rights reserved.
Two ethynyl-linked pi-conjugated compounds with bright blue photoluminescence property were designed, synthesized and fully characterized. The main structures of them contain a pyrene as electron acceptor, a carbazole as electron donor linked by an ethynyl unit. This D-A system has increased electron mobility and high quantum yields. One of the compounds was sandwiched as luminescent in single- and double-layer devices. By incorporating Alq as electron transport layer, the double-layer device exhibits dramatically improved performances compared with the single-layer device. The compounds are promising blue light-emitting and electron-transport materials. (c) 2006 Elsevier B.V. All rights reserved.