Abstract

The contact potential difference between cadmium sulfide and the sensitizing dyes pinacyanole, kryptocyanine, and neocyanine has been measured by the electron beam retardation method and found to be of the order of 0.3 v in each case. That between silver bromide and pinacyanole has also been measured to be 0.38 v, the dye in all cases having the smaller electron affinity. These results confirm the tenability of the Gurney-Mott electron transfer mechanism of dye sensitization in photography. Using the same method the electron affinity of pinacyanole has been found to be about 3.1 ev; that of silver bromide is thus approximately 3.5 ev, in agreement with previous estimates.

© 1956 Optical Society of America

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References

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  1. R. C. Nelson, J. Opt. Soc. Am. 46, 13 (1956).
    [Crossref]
  2. G. Mönch, Z. Physik 47, 522 (1928). See also P. A. Anderson, Phys. Rev. 47, 958 (1935).
    [Crossref]
  3. J. Millman and S. Seely, Electronics (McGraw-Hill Book Company, Inc., New York, 1941), p. 157 ff.
  4. A. L. Hughes and L. A. DuBridge, Photoelectric Phenomena (McGraw-Hill Book Company, Inc., New York, 1932), p. 76.
  5. R. W. Gurney and N. F. Mott, Proc. Roy. Soc. (London) A164, 151 (1938).
  6. N. F. Mott and R. W. Gurney, Electronic Processes in Ionic Crystals (Clarendon Press, Oxford, 1940), p. 245.
  7. M. A. Gilleo, Phys. Rev. 91, 534 (1953).
    [Crossref]

1956 (1)

1953 (1)

M. A. Gilleo, Phys. Rev. 91, 534 (1953).
[Crossref]

1938 (1)

R. W. Gurney and N. F. Mott, Proc. Roy. Soc. (London) A164, 151 (1938).

1928 (1)

G. Mönch, Z. Physik 47, 522 (1928). See also P. A. Anderson, Phys. Rev. 47, 958 (1935).
[Crossref]

DuBridge, L. A.

A. L. Hughes and L. A. DuBridge, Photoelectric Phenomena (McGraw-Hill Book Company, Inc., New York, 1932), p. 76.

Gilleo, M. A.

M. A. Gilleo, Phys. Rev. 91, 534 (1953).
[Crossref]

Gurney, R. W.

R. W. Gurney and N. F. Mott, Proc. Roy. Soc. (London) A164, 151 (1938).

N. F. Mott and R. W. Gurney, Electronic Processes in Ionic Crystals (Clarendon Press, Oxford, 1940), p. 245.

Hughes, A. L.

A. L. Hughes and L. A. DuBridge, Photoelectric Phenomena (McGraw-Hill Book Company, Inc., New York, 1932), p. 76.

Millman, J.

J. Millman and S. Seely, Electronics (McGraw-Hill Book Company, Inc., New York, 1941), p. 157 ff.

Mönch, G.

G. Mönch, Z. Physik 47, 522 (1928). See also P. A. Anderson, Phys. Rev. 47, 958 (1935).
[Crossref]

Mott, N. F.

R. W. Gurney and N. F. Mott, Proc. Roy. Soc. (London) A164, 151 (1938).

N. F. Mott and R. W. Gurney, Electronic Processes in Ionic Crystals (Clarendon Press, Oxford, 1940), p. 245.

Nelson, R. C.

Seely, S.

J. Millman and S. Seely, Electronics (McGraw-Hill Book Company, Inc., New York, 1941), p. 157 ff.

J. Opt. Soc. Am. (1)

Phys. Rev. (1)

M. A. Gilleo, Phys. Rev. 91, 534 (1953).
[Crossref]

Proc. Roy. Soc. (London) (1)

R. W. Gurney and N. F. Mott, Proc. Roy. Soc. (London) A164, 151 (1938).

Z. Physik (1)

G. Mönch, Z. Physik 47, 522 (1928). See also P. A. Anderson, Phys. Rev. 47, 958 (1935).
[Crossref]

Other (3)

J. Millman and S. Seely, Electronics (McGraw-Hill Book Company, Inc., New York, 1941), p. 157 ff.

A. L. Hughes and L. A. DuBridge, Photoelectric Phenomena (McGraw-Hill Book Company, Inc., New York, 1932), p. 76.

N. F. Mott and R. W. Gurney, Electronic Processes in Ionic Crystals (Clarendon Press, Oxford, 1940), p. 245.

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Figures (2)

Fig. 1
Fig. 1

Simplified diagram of electron gun and circuitry for measurement of contact potential differences.

Fig. 2
Fig. 2

Typical plot of log current versus retarding voltage for a silver foil target. The contact potential difference with respect to the tungsten filament is −0.29 v.