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Photophysical studies of polyvinylcarbazole polymer films
Author(s) -
Patel Shruti,
Ramrakhiani M.,
Bisen D. P.
Publication year - 2007
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.25278
Subject(s) - photoluminescence , materials science , electroluminescence , absorption (acoustics) , doping , absorption spectroscopy , photoluminescence excitation , analytical chemistry (journal) , wavelength , polymer , visible spectrum , optoelectronics , photochemistry , optics , chemistry , nanotechnology , physics , organic chemistry , composite material , layer (electronics)
Polyvinylcarbazole (PVK) films have been prepared by solution method. Their absorption spectra, photoluminescence, and electroluminescence have been studied. Absorption in pure PVK is found to be high at lower wavelengths in UV region and decreases in visible range. In case of I 2 doped PVK, absorption is observed in visible region also. The photoluminescence is obtained in pure PVK when exited by violet or blue light but in case of I 2 doped PVK, similar excitation gives low intensity peaks in yellow–green region. The results indicate that I 2 levels in PVK causes absorption in 400–600 nm wavelength range and makes the deexcitation of the molecules nonradiative. Light emission by application of ac voltage from mains up to 100 V has been studied. Nonlinear increase in emission intensity has been observed with increasing voltage. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci 104: 722–726, 2007