ISSN:
1662-8985
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
High-resolution photoluminescence (PL) measurement was carried out for copperaluminum disulfide (CuAlS2) powder at 12 K. Several sharp PL lines were observed in the rangefrom 3.580 to 3.320 eV. The emission peaks at photon energies from 3.566 to 3.459 eV wereattributed to free-exciton (FE) and bound-excitons (BE). The several weak emissions at below3.476 eV were clarified to be phonon replicas (PR) by Raman scattering and in the viewpoint ofexciton-phonon interaction. We observed the one, two and three-phonon replicas related to E(LO, TO)and B2(LO, TO) vibrational modes in chalcopyrite structure. It was suggested that the stronginteraction between excitons and optical phonons took place in obtained CuAlS2 powder
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/39/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.11-12.175.pdf
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