Pressure behavior of deep centers in ZnSxTe1-x alloys
Data(s) |
1999
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Resumo |
We have measured photoluminescence of ZnSxTe1-x alloys (x > 0.7) at 300 K and under hydrostatic pressure up to 7 GPa. The spectra contain only a broad emission band under excitation of the 406.7 nm line. Its pressure coefficients are 47, 62 and 45 meV/GPa for x = 0.98, 0.92 and 0.79 samples, which are about 26%, 7% and 38% smaller than that of the band gap in the corresponding alloys. The Stokes shifts between emission and absorption of the bands were calculated by fitting the pressure dependence of the emission intensity, being 0.29, 0.48 and 0.13 eV for the three samples, respectively. The small pressure coefficient and large Stokes shift indicate that the emission band observed in our samples may correspond to the Te isoelectronic center in the ZnSxTe1-x alloy. We have measured photoluminescence of ZnSxTe1-x alloys (x > 0.7) at 300 K and under hydrostatic pressure up to 7 GPa. The spectra contain only a broad emission band under excitation of the 406.7 nm line. Its pressure coefficients are 47, 62 and 45 meV/GPa for x = 0.98, 0.92 and 0.79 samples, which are about 26%, 7% and 38% smaller than that of the band gap in the corresponding alloys. The Stokes shifts between emission and absorption of the bands were calculated by fitting the pressure dependence of the emission intensity, being 0.29, 0.48 and 0.13 eV for the three samples, respectively. The small pressure coefficient and large Stokes shift indicate that the emission band observed in our samples may correspond to the Te isoelectronic center in the ZnSxTe1-x alloy. 于2010-11-15批量导入 zhangdi于2010-11-15 17:02:33导入数据到SEMI-IR的IR Made available in DSpace on 2010-11-15T09:02:33Z (GMT). No. of bitstreams: 1 3017.pdf: 227742 bytes, checksum: f36727a9bea3c3d039cf476633153e1f (MD5) Previous issue date: 1999 Chinese Acad Sci, Inst Semicond, Natl Lab Superlattices & Microstruct, Beijing 100083, Peoples R China; Hong Kong Univ Sci & Technol, Dept Phys, Kowloon, Hong Kong |
Identificador | |
Idioma(s) |
英语 |
Publicador |
WILEY-V C H VERLAG GMBH MUHLENSTRASSE 33-34, D-13187 BERLIN, GERMANY |
Fonte |
Liu NZ; Li GH; Zhang W; Zhu ZM; Han HX; Wang ZP; Ge WK; Sou IK .Pressure behavior of deep centers in ZnSxTe1-x alloys .见:WILEY-V C H VERLAG GMBH .PHYSICA STATUS SOLIDI B-BASIC RESEARCH, 211 (1),MUHLENSTRASSE 33-34, D-13187 BERLIN, GERMANY ,1999,163-169 |
Palavras-Chave | #半导体物理 #ABSORPTION-EDGE #STRAINS #ZNS |
Tipo |
会议论文 |