TY - JOUR
T1 - Raman scattering and electroluminescence of ZnS:Cu,Cl phosphor powder
AU - Nien, Yung Tang
AU - Chen, In Gann
N1 - Funding Information:
One of the authors (Y.T.N.) thanks S. C. Yu (NCKU, Taiwan) for the loan of a Raman spectrometer and Todd Graham for the critical reading of this letter. Work at SIMS-NRC (Canada) was supported by National Science Council (NSC) of Taiwan.
PY - 2006
Y1 - 2006
N2 - Raman spectra of ZnS:Cu,Cl powders show a structural transition from hexagonal to cubic and a crystal growth with increasing Cu addition (>400 ppm), which is supposed to result from Cu incorporation or Cux S precipitation. The redshift of longitudinal optical mode in ZnS:Cu,Cl with increased amounts of Cu suggests that the excess Cu ions were located interstitially in the lattice and created a tensile strain. Under an electric field (3.75× 106 Vm), a broad emission spectrum superposing of green, self-activated blue, and blue bands can be observed in the powders (Cu≥400 ppm), which agrees with the luminescence centers of CuZn+, vacancies, and Cui+, respectively.
AB - Raman spectra of ZnS:Cu,Cl powders show a structural transition from hexagonal to cubic and a crystal growth with increasing Cu addition (>400 ppm), which is supposed to result from Cu incorporation or Cux S precipitation. The redshift of longitudinal optical mode in ZnS:Cu,Cl with increased amounts of Cu suggests that the excess Cu ions were located interstitially in the lattice and created a tensile strain. Under an electric field (3.75× 106 Vm), a broad emission spectrum superposing of green, self-activated blue, and blue bands can be observed in the powders (Cu≥400 ppm), which agrees with the luminescence centers of CuZn+, vacancies, and Cui+, respectively.
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U2 - 10.1063/1.2423326
DO - 10.1063/1.2423326
M3 - Article
AN - SCOPUS:33846056995
VL - 89
JO - Applied Physics Letters
JF - Applied Physics Letters
SN - 0003-6951
IS - 26
M1 - 261906
ER -