Please use this identifier to cite or link to this item: https://scholarbank.nus.edu.sg/handle/10635/80693
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dc.titleLuminescence anomaly in band gap tailored In0.53(GaxAl1-x)0.147As quaternary alloy grown by molecular beam epitaxy
dc.contributor.authorRamam, A.
dc.contributor.authorChua, S.J.
dc.date.accessioned2014-10-07T03:00:18Z
dc.date.available2014-10-07T03:00:18Z
dc.date.issued1997-05
dc.identifier.citationRamam, A.,Chua, S.J. (1997-05). Luminescence anomaly in band gap tailored In0.53(GaxAl1-x)0.147As quaternary alloy grown by molecular beam epitaxy. Journal of Crystal Growth 175-176 (PART 2) : 1294-1298. ScholarBank@NUS Repository.
dc.identifier.issn00220248
dc.identifier.urihttp://scholarbank.nus.edu.sg/handle/10635/80693
dc.description.abstractIn0.53(GaxAl1-x)0.47As epilayers with band gap energy varying from 0.78 to 1.42 eV are grown lattice matched to InP substrate by MBE technique. The lattice mismatch and crystalline quality of the layers are assessed by the double crystal X-ray diffraction and the lattice vibrations due to the three binary compounds in the alloy are observed in the Raman spectra. Photoluminescence studies in the range 4-100 K showed an anomalous "inverted S" shaped variation in the PL energy versus temperature plot for epilayers with Al mole fraction less than 0.2. For mole fraction greater than 0.2, the characteristic dip in the energy values disappears and the normal band gap energy versus temperature relation is restored. Strong localization of excitons is associated with such a behavior in Al rich InGaAlAs epilayers.
dc.sourceScopus
dc.subjectExciton
dc.subjectLattice matching
dc.subjectMolecular beam epitaxy
dc.subjectPhotoluminescence
dc.subjectQuaternary alloy
dc.typeArticle
dc.contributor.departmentELECTRICAL ENGINEERING
dc.description.sourcetitleJournal of Crystal Growth
dc.description.volume175-176
dc.description.issuePART 2
dc.description.page1294-1298
dc.description.codenJCRGA
dc.identifier.isiutNOT_IN_WOS
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