Growth of CuInSe 2 monograin powders with different compositions
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F14.28.1
Growth of CuInSe2 monograin powders with different compositions Marit Kauk, Mare Altosaar, Jaan Raudoja, Kristi Timmo, Maarja Grossberg, Tiit Varema, Enn Mellikov Institute of Materials Science, Tallinn University of Technology, Ehitajate Rd 5, 19086 Tallinn, Estonia
ABSTRACT
CuInSe2 monograin powders (MGP) were synthesized from Cu-In alloys of different Cu/In concentration ratios and elemental Se in liquid phase of flux material in evacuated quartz ampoules. The surface morphology, phase structure, and composition of the powder crystals were analyzed by scanning electron microscopy, X-ray diffraction, and energy-dispersive X-ray analysis respectively. Bulk composition was analyzed polarographically. Photoluminescence spectra were measured at 9 K. It was found that the composition of MGP material (Cu/In concentration ratio) can be controlled by the concentration ratio of precursor Cu-In alloys. Single phase CuInSe2 growth is realisable between 0.7
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