Transparent wide band gap crystals follow indirect allowed transition and bipolaron hopping mechanism

Recently, we carried out structural, optical and dielectric studies on micro-crystals of Oxypeucedanin (C16H14O5), isolated from the roots of plant Prangos pabularia (Mir et al. (2014) [3,4]). The obtained trend in frequency exponent (s) with frequency (ω) indicates that the universal dynamic respon...

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Bibliographic Details
Published inResults in physics Vol. 4; no. C; pp. 103 - 104
Main Author Mir, Feroz A.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 2014
Elsevier
Subjects
Band
Dielectric
Dynamic
Optical
Spectroscopy
Structural
Spectroscopy
Dynamic
Band
Dielectric
Optical
Structural
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Summary:Recently, we carried out structural, optical and dielectric studies on micro-crystals of Oxypeucedanin (C16H14O5), isolated from the roots of plant Prangos pabularia (Mir et al. (2014) [3,4]). The obtained trend in frequency exponent (s) with frequency (ω) indicates that the universal dynamic response is followed by this compound. From optical absorption spectroscopy, the optical band gap (Eg) was estimated around 3.76eV and system is showing indirect allowed transition. Using Eg in certain relation of s, a close value of s (as much close obtained by fitting ac conductivity) was obtained. This method was further used for other similar systems and again same trend was obtained. So a general conclusion was made that the high transmitting wide band insulators or semiconductors may follow bipolaron hopping transport mechanism.
ISSN:2211-3797
2211-3797
DOI:10.1016/j.rinp.2014.06.001