Synthesis and characterization of new blue-photoluminescent copolymer derived from bisphenol A

N Jaballah , H Trad , M Majdoub , M Jouini , J Roussel , Jean-Louis Fave (1)

1 INSP - Institut des Nanosciences de Paris

Anew copolymer with short alternating conjugated and nonconjugated blocks, derived from bisphenol A (BPAEt(2)-PPV) containing separated phenylenevinylene (PV) units has been synthesized by Wittig condensation. The copolymer is fully soluble in common organic solvents and has a number-average molecular weight of 3200 with a polydispersity index of 1.53. The structure of the polymer was confirmed by H-1 NMR, C-13 NMR, FTIR and Raman spectroscopic analysis. Thermogravimetric analysis and differential scanning calorimetry indicate that BPAEt(2)-PPV is stable up to 400 degrees C in air and displays a glass transition temperature of 107 degrees C. The fluorescence spectrum of the polymer film shows art emission in the blue region (428, 456, and 488 run). The band-gap energy estimated from the edge absorption of the film, is about 2.9 eV. A single-layer diode device of the configuration ITO/BPAEt(2)-PPV/Al has been fabricated and has a relatively low turn-on voltage of 3.7 V. (c) 2006 Wiley Periodicals, Inc.

Mots clés: bisphenol A (BPA); Wittig polycondensation; conjugated polymers; luminescence; light-emitting diodes (LED)

Domaines: Matière Condensée [cond-mat]

N Jaballah, H Trad, M Majdoub, M Jouini, J Roussel, et al.. Synthesis and characterization of new blue-photoluminescent copolymer derived from bisphenol A. Journal of Applied Polymer Science, 2006, 99 (6), pp.2997-3004. ⟨10.1002/app.23022⟩. ⟨hal-01281508⟩