Light-emitting electrochemical cells based on poly(p-phenylene vinylene) copolymers with ion-transporting side groups

• Published in: Synthetic metals Vol. 122; no. 1; pp. 111 - 113
• Main Authors: Morgado, J., Friend, R.H., Cacialli, F., Chuah, B.S., Rost, H., Moratti, S.C., Holmes, A.B.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Lausanne Elsevier B.V 01.05.2001; Amsterdam Elsevier Science; New York, NY
• Subjects: Application fields; Applied sciences; Copolymers; Electronics; Exact sciences and technology; Light-emitting electrochemical cells; Optoelectronic devices; Poly(p-phenylene vinylene); Polymer industry, paints, wood; Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices; Technology of polymers; Poly(p-phenylene vinylene); Light-emitting electrochemical cells; Copolymers; Phenylene derivative copolymer; Polymer blends; Voltage current curve; Phenylenevinylene derivative copolymer; Use; Electrochemical cell; Electroluminescence; Experimental study; Silicon copolymer; Ethylene oxide polymer; Conjugated copolymer; Electroluminescent device; Response time; Alternating copolymer; Lithium compound; Current time characteristic
• ISSN: 0379-6779; 1879-3290
• DOI: 10.1016/S0379-6779(00)01366-7

We present the electro-optical characteristics of LECs based on two copolymers derived from poly(p-phenylene vinylene), DB-alt-BTEM-PPV and BDMOS-co-BTEM-PPV, having ion-transporting side groups. We find typical LEC behaviour upon addition of lithium triflate. Addition of poly(ethylene oxide), PEO, improves the EL efficiency, but the response time increases. We discuss these observations on the basis of PEO-induced phase separation.