Photoconduction of 9,10-Anthraquinone Single Crystals

概要

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Bulky as well as needle-like single crystals of 9,10-anthraquinone were grown by the Bridgman and the vapor phase growth technique respectively. The bulky single crystal is transparent and yellow and can be cleaved easily along (ab)-, (bc)- and (ac)-planes of the crystal. Crystals with dimension about 1 × 1 × 1cm can be prepared easily. The DC-photoconductivity is about two orders of magnitude smaller than that of anthracene. It is recognized that carriers are generated with radiation at 4100A which induces the n-π^* transition of the molecule. Also carriers are generated for radiations which induce π-π^* excitations in the wavelength region of 2500A to 3000A. In π-π^* excitation region, the photocurrent with the illuminated electrode negative is much larger than that with the illuminated electrode positive. The photoconduction changes with thermal activation energy of 0.17eV.
社団法人日本物理学会の論文
1968-04-05