Cho, H.N. Kim, D.Y. Kim, Y.C. Lee, J.Y. Kim, C.Y. 2024-01-21T17:42:25Z 2024-01-21T17:42:25Z 2021-09-02 1998-01 1071-0922 https://pubs.kist.re.kr/handle/201004/143444 Poly(hexyl-fluorenediylvinylene-alt-phenylenevinylene)(PHFPPV) has been synthesized by a Wittig reaction between a fluorene phosphonium salt and terephthalaldehyde. The alternating copolymer was thermally stable to be decomposed at 410°C and soluble in chloroform. The photoluminescence (PL) spectrum is very broad and has shoulders and a bump. The bump at 560 nm disappeared on dilution of the copolymer in chloroform. The EL spectrum is broad, but not as broad as the PL spectrum, and is significantly different from the PL spectrum. The quantum efficiency of the LED was 0.002% with aluminum as a negative electrode, and the turn-on voltage was 20 V. English Society for Information Display Synthesis and characterization of a light-emitting diode from an alternating copolymer Article 10.1889/1.1985203 1 Journal of the Society for Information Display, v.6, no.1, pp.39 - 42 Journal of the Society for Information Display 6 1 39 42 N scopus 2-s2.0-0031635924 Article Copolymers Electroluminescence Photoluminescence Quantum efficiency Synthesis (chemical) Thermodynamic stability Emissive alternating copolymers Light emitting diodes Emissive alternating copolymer Polymer light-emitting diodes