Abstract

Dysprosium- and samarium-activated yttrium vanadates, when properly prepared, are phosphors with constant quantum yield over the range of 2000 to 3450 Å. Correlation of stoichiometry and reflectance is given and an explanation of the possible energy processes is also presented.

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  1. K. Watanabe and E. C. Y. Inn., J. Opt. Soc. Am. 43, 32 (1953).
  2. J. F. Manmann, Z. Angew. Phys. 10, 197 (1958); M. Schon and O. Schult, Z. Instrumentenk. 66, 67 (1958).
  3. C. A. Parker and W. T. Rees, Analyst 85, 587 (1960); see also C. A. Parker, Nature 182, 1002 (1958).
  4. W. H. Melhuish, New Zealand J. Sci. Tech. 37, 2B, 142, (1955); see also W. H. Melhuish, J. Opt. Soc. Am. 52, 1256 (1962); K. J. Nygaard, J. Opt. Soc. Am. 55, 944 (1965).
  5. These data have been corrected by calculation to show any deviation from linear quantum yield more clearly. Actually, as recorded under constant-energy excitation, the sodium salicylate curve shows a straight-line slope with wavelength, as would be expected. The YVO4:Dy and YVO4:Sm curves differ only in relative intensity as shown. Thus, if sodium salicylate has a constant quantum yield then so have the Dy+3 and Sm+3 activated phosphors.
  6. W. Slavin, R. W. Mooney, and D. T. Palumbo, J. Opt. Soc. Am. 51, 93 (1961).
  7. Diffuse-powder reflectance data were obtained with a Cary-15 spectrophotometer, equipped with dual reflectance spheres, coated with BaSO4.
  8. F. C. Palilla, A. K. Levine, and M. Rinkevics, J. Electrochem. Soc. 112, 776 (1965).
  9. R. C. Ropp, J. Electrochem. Soc. 112, 181 (1965).
  10. H. H. Tippins, J. Phys. Chem. Solids 27, 1069 (1966).
  11. G. H. Dieke and H. M. Crosswhite, Appl. Opt. 2, 675 (1963).

Crosswhite, H. M.

G. H. Dieke and H. M. Crosswhite, Appl. Opt. 2, 675 (1963).

Dieke, G. H.

G. H. Dieke and H. M. Crosswhite, Appl. Opt. 2, 675 (1963).

Inn., E. C. Y.

K. Watanabe and E. C. Y. Inn., J. Opt. Soc. Am. 43, 32 (1953).

Levine, A. K.

F. C. Palilla, A. K. Levine, and M. Rinkevics, J. Electrochem. Soc. 112, 776 (1965).

Manmann, J. F.

J. F. Manmann, Z. Angew. Phys. 10, 197 (1958); M. Schon and O. Schult, Z. Instrumentenk. 66, 67 (1958).

Melhuish, W. H.

W. H. Melhuish, New Zealand J. Sci. Tech. 37, 2B, 142, (1955); see also W. H. Melhuish, J. Opt. Soc. Am. 52, 1256 (1962); K. J. Nygaard, J. Opt. Soc. Am. 55, 944 (1965).

Mooney, R. W.

W. Slavin, R. W. Mooney, and D. T. Palumbo, J. Opt. Soc. Am. 51, 93 (1961).

Palilla, F. C.

F. C. Palilla, A. K. Levine, and M. Rinkevics, J. Electrochem. Soc. 112, 776 (1965).

Palumbo, D. T.

W. Slavin, R. W. Mooney, and D. T. Palumbo, J. Opt. Soc. Am. 51, 93 (1961).

Parker, C. A.

C. A. Parker and W. T. Rees, Analyst 85, 587 (1960); see also C. A. Parker, Nature 182, 1002 (1958).

Rees, W. T.

C. A. Parker and W. T. Rees, Analyst 85, 587 (1960); see also C. A. Parker, Nature 182, 1002 (1958).

Rinkevics, M.

F. C. Palilla, A. K. Levine, and M. Rinkevics, J. Electrochem. Soc. 112, 776 (1965).

Ropp, R. C.

R. C. Ropp, J. Electrochem. Soc. 112, 181 (1965).

Slavin, W.

W. Slavin, R. W. Mooney, and D. T. Palumbo, J. Opt. Soc. Am. 51, 93 (1961).

Tippins, H. H.

H. H. Tippins, J. Phys. Chem. Solids 27, 1069 (1966).

Watanabe, K.

K. Watanabe and E. C. Y. Inn., J. Opt. Soc. Am. 43, 32 (1953).

Other (11)

K. Watanabe and E. C. Y. Inn., J. Opt. Soc. Am. 43, 32 (1953).

J. F. Manmann, Z. Angew. Phys. 10, 197 (1958); M. Schon and O. Schult, Z. Instrumentenk. 66, 67 (1958).

C. A. Parker and W. T. Rees, Analyst 85, 587 (1960); see also C. A. Parker, Nature 182, 1002 (1958).

W. H. Melhuish, New Zealand J. Sci. Tech. 37, 2B, 142, (1955); see also W. H. Melhuish, J. Opt. Soc. Am. 52, 1256 (1962); K. J. Nygaard, J. Opt. Soc. Am. 55, 944 (1965).

These data have been corrected by calculation to show any deviation from linear quantum yield more clearly. Actually, as recorded under constant-energy excitation, the sodium salicylate curve shows a straight-line slope with wavelength, as would be expected. The YVO4:Dy and YVO4:Sm curves differ only in relative intensity as shown. Thus, if sodium salicylate has a constant quantum yield then so have the Dy+3 and Sm+3 activated phosphors.

W. Slavin, R. W. Mooney, and D. T. Palumbo, J. Opt. Soc. Am. 51, 93 (1961).

Diffuse-powder reflectance data were obtained with a Cary-15 spectrophotometer, equipped with dual reflectance spheres, coated with BaSO4.

F. C. Palilla, A. K. Levine, and M. Rinkevics, J. Electrochem. Soc. 112, 776 (1965).

R. C. Ropp, J. Electrochem. Soc. 112, 181 (1965).

H. H. Tippins, J. Phys. Chem. Solids 27, 1069 (1966).

G. H. Dieke and H. M. Crosswhite, Appl. Opt. 2, 675 (1963).

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