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- Title
Photoluminescence decay time studies on ZnS in cubic and hexagonal phase and its mechanico-chemical interaction with polyaniline.
- Authors
Scocioreanu, Malvina; Mihut, Lucian; Baibarac, Mihaela; Baltog, Ioan
- Abstract
We report new photoluminescence (PL) data generated by pulsed optical excitation on the composites achieved by a mechanico-chemical reaction between ZnS in the cubic (c) and wurtzite (w) phases and polyaniline-emeraldine base (PANI-EB). Under continuous and pulsed optical excitation, powders of the (w)ZnS and (w)ZnS/PANI-EB composites display PL with different spectral compositions. Contrary to expectations, the (c)ZnS and the (c)ZnS/PANI-EB composite displayed weak PL and decay time in the range of nanoseconds. This results from the great involvement of the surface states in nanometric powders which creates efficient channels for the non-radiative recombination of the carriers.
- Subjects
PHOTOLUMINESCENCE; POLYALANINE; COMPOSITE materials research; ZINC sulfide; WURTZITE
- Publication
Physica Status Solidi (B), 2013, Vol 250, Issue 7, p1426
- ISSN
0370-1972
- Publication type
Article
- DOI
10.1002/pssb.201248234