نتایج جستجو برای: photoconductivity
تعداد نتایج: 1006 فیلتر نتایج به سال:
Two-photon photoconductivity in ZnSe is used to record femtosecond autocorrelation functions. This technique requires <100 muW of average power of a typical mode-locked femtosecond Ti:sapphire laser and distinguishes itself by a dynamic range over several decades and great conversion bandwidth, permitting the sensitive correlation of pulses of a few femtoseconds.
Carrier decay transients in 4H-SiC n-type and p-type epilayers have been characterized using a non-destructive, non-contact microwave photoconductivity technique. Decay transients show a two-stage exponential decay with first decay constants as high as 400 ns in 10 μm p-type epilayers. The second decay constant increases with temperature and is dominated by interface recombination.
Photoinduced electron transfer in a self-assembled supramolecular ladder structure comprising oligomeric porphyrin rails and ligated dipyridyltetrazine rungs was characterized by transient absorption spectroscopy and transient direct current photoconductivity to be mainly from an oligomer (rail) to the center of a terminal tetrazine (rung), with the remaining hole being delocalized on the oligo...
D. C. dark - and photoconductivity measurements were performed with synthetic melanins prepared by oxidative polymerization of dopamine, adrenaline, adrenochrome and adrenolutin. The melanins examined show significant differences in conductivity, thermal activation energy and photocurrent intensity values. The differences in semiconductor properties observed between the melanins reflect the str...
Chemistry of Materials is published by the American Chemical Society. 1155 Sixteenth Street N.W., Washington, DC 20036 Article Orientational Dependence of the Color and Photoconductivity of 1,4-Di-p-toluidinoanthraquinone Single Crystals Toshiro Saito, Chong-yang Liu, Vincent M. Lynch, and Allen J. Bard Chem. Mater., 1997, 9 (6), 1318-1327 • DOI: 10.1021/cm960652f Downloaded from http://pubs.ac...
The basic requirements of the CdS thin films on their applications are high optical transparency, low electrical resistivity, and better crystalinity (e.g.high orientation). Firstly, we prepared CdS films by thermal eveporation techniques on glass substrate and then studied their photoconductivity from room temperature to 200 . Secondly, we prepared CdS films with impurities of Cu, Ag, Au and...
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