Abstract
The photoluminescence (PL) spectra of AgInS2 crystals grown by a hot-press method have been investigated by confocal microspectroscopy. The two-dimensional image of PL intensity, which shows an area of the chalcopyrite and orthorhombic structures, with a high resolution of micrometer order was obtained. The free-exciton and biexciton emissions on the chalcopyrite structure were clearly separated. Furthermore, the temperature dependence of band-gap energy was analyzed.
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