Photophysical studies of polyvinylcarbazole polymer films

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 I2 doped PVK, absorpti...

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Bibliographic Details
Published in:Journal of applied polymer science 2007-04, Vol.104 (2), p.722-726
Main Authors: Patel, Shruti, Ramrakhiani, M., Bisen, D. P.
Format: Article
Language:English
Subjects:
absorption spectra
electroluminescence
photoluminescence
PVK film
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Summary: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 I2 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 I2 doped PVK, similar excitation gives low intensity peaks in yellow–green region. The results indicate that I2 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
ISSN:0021-8995
1097-4628
DOI:10.1002/app.25278