Abstract

A photo-e.m.f. effect is observed in Tl<sub>2</sub>S produced by partial sulphurization of a thallium disk or of an evaporated thallium layer. The photosensitivity is observed to be as high as 6000.10<sup>-6</sup> ampere/lumen. Both open-circuit-voltage and short-circuit-current are observed in some cells to be directly proportional to the incident light intensity at all temperatures. In other cells, especially those displaying high photo-response, the open-circuit-voltage and shortcircuit-current tend to saturate at high light intensities.The spectral photosensitivity curve possesses a maximum at 9800A±200A with long and short wave thresholds at 15,000 and 6500A, respectively. The short-circuit-current <i>increases with decreasing</i> temperature down to about -45°C and then decreases continuously down to - 180°C. The position of the maximum varies somewhat from cell to cell.The photoelectric output of the cells when measured as a function of frequency of interruption of the incident light displays a recession of 75 percent at 20,000 cycles.

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  1. J. Frenkel and A. Joffè, Physik. Zeits. d. Sowjetunion 1, 60 (1932).
  2. R. Robertson, J. J. Fox, and A. E. Martin, Nature 129, 579 (1932); Phil. Trans. Roy. Soc. London A232, 463 (1934).
  3. H. Dember, Naturwiss. 20, 758 (1932).
  4. S. Pelz, Naturwiss. 21, 517 (1933).
  5. H. Dember, Physik. Zeits. 32, 554 (1931).
  6. F. C. Nix, Rev. Mod. Phys. 4, 723 (1932).
  7. E. Duhme and W. Schottky, Naturwiss. 18, 735 (1930).
  8. Campbell and Ritchie, Photoelectric Cells (Pitman &Sons, Ltd., 1934).
  9. M. Dubar, Comptes rendus 193, 659 (1931).
  10. B. Kolomiez, (Comptes rendus (Doklady) de l'Academie des Sciences d l'U. R. S. S. 14 (1938)) has recently published a brief note concerning a similar cell.
  11. O. V. Auwers and H. Kerschbaum, Ann. d. Physik 7, 129 (1930).
  12. L. Bergmann, Physik. Zeits. 33, 513 (1932).
  13. M. Borissow, C. Sinelnikow and A. Walther, Physik. Zeits. d. Sowjetunion 3, 146 (1933).
  14. L. A. Wood, Rev. Sci. Inst. 6, 196 (1935).
  15. Mme. Roy-Pochon, Comptes rendus 198, 2083 (1934).
  16. F. C. Nix, Phys. Rev. 47, 72 (1935).
  17. W. W. Coblentz, Sci. Paper, Nat. Bur. Standards, No.380 (1920).
  18. A. F. Joffè, Semi-Conducteurs Electroniques (Hermann & Cie, Paris, 1935).

Auwers, O. V.

O. V. Auwers and H. Kerschbaum, Ann. d. Physik 7, 129 (1930).

Bergmann, L.

L. Bergmann, Physik. Zeits. 33, 513 (1932).

Borissow, M.

M. Borissow, C. Sinelnikow and A. Walther, Physik. Zeits. d. Sowjetunion 3, 146 (1933).

Coblentz, W. W.

W. W. Coblentz, Sci. Paper, Nat. Bur. Standards, No.380 (1920).

Dember, H.

H. Dember, Naturwiss. 20, 758 (1932).

H. Dember, Physik. Zeits. 32, 554 (1931).

Dubar, M.

M. Dubar, Comptes rendus 193, 659 (1931).

Duhme, E.

E. Duhme and W. Schottky, Naturwiss. 18, 735 (1930).

Fox, J. J.

R. Robertson, J. J. Fox, and A. E. Martin, Nature 129, 579 (1932); Phil. Trans. Roy. Soc. London A232, 463 (1934).

Frenkel, J.

J. Frenkel and A. Joffè, Physik. Zeits. d. Sowjetunion 1, 60 (1932).

Joffè, A.

J. Frenkel and A. Joffè, Physik. Zeits. d. Sowjetunion 1, 60 (1932).

Joffè, A. F.

A. F. Joffè, Semi-Conducteurs Electroniques (Hermann & Cie, Paris, 1935).

Kerschbaum, H.

O. V. Auwers and H. Kerschbaum, Ann. d. Physik 7, 129 (1930).

Kolomiez, B.

B. Kolomiez, (Comptes rendus (Doklady) de l'Academie des Sciences d l'U. R. S. S. 14 (1938)) has recently published a brief note concerning a similar cell.

Martin, A. E.

R. Robertson, J. J. Fox, and A. E. Martin, Nature 129, 579 (1932); Phil. Trans. Roy. Soc. London A232, 463 (1934).

Nix, F. C.

F. C. Nix, Rev. Mod. Phys. 4, 723 (1932).

F. C. Nix, Phys. Rev. 47, 72 (1935).

Pelz, S.

S. Pelz, Naturwiss. 21, 517 (1933).

Robertson, R.

R. Robertson, J. J. Fox, and A. E. Martin, Nature 129, 579 (1932); Phil. Trans. Roy. Soc. London A232, 463 (1934).

Roy-Pochon, Mme.

Mme. Roy-Pochon, Comptes rendus 198, 2083 (1934).

Schottky, W.

E. Duhme and W. Schottky, Naturwiss. 18, 735 (1930).

Sinelnikow, C.

M. Borissow, C. Sinelnikow and A. Walther, Physik. Zeits. d. Sowjetunion 3, 146 (1933).

Walther, A.

M. Borissow, C. Sinelnikow and A. Walther, Physik. Zeits. d. Sowjetunion 3, 146 (1933).

Wood, L. A.

L. A. Wood, Rev. Sci. Inst. 6, 196 (1935).

Other (18)

J. Frenkel and A. Joffè, Physik. Zeits. d. Sowjetunion 1, 60 (1932).

R. Robertson, J. J. Fox, and A. E. Martin, Nature 129, 579 (1932); Phil. Trans. Roy. Soc. London A232, 463 (1934).

H. Dember, Naturwiss. 20, 758 (1932).

S. Pelz, Naturwiss. 21, 517 (1933).

H. Dember, Physik. Zeits. 32, 554 (1931).

F. C. Nix, Rev. Mod. Phys. 4, 723 (1932).

E. Duhme and W. Schottky, Naturwiss. 18, 735 (1930).

Campbell and Ritchie, Photoelectric Cells (Pitman &Sons, Ltd., 1934).

M. Dubar, Comptes rendus 193, 659 (1931).

B. Kolomiez, (Comptes rendus (Doklady) de l'Academie des Sciences d l'U. R. S. S. 14 (1938)) has recently published a brief note concerning a similar cell.

O. V. Auwers and H. Kerschbaum, Ann. d. Physik 7, 129 (1930).

L. Bergmann, Physik. Zeits. 33, 513 (1932).

M. Borissow, C. Sinelnikow and A. Walther, Physik. Zeits. d. Sowjetunion 3, 146 (1933).

L. A. Wood, Rev. Sci. Inst. 6, 196 (1935).

Mme. Roy-Pochon, Comptes rendus 198, 2083 (1934).

F. C. Nix, Phys. Rev. 47, 72 (1935).

W. W. Coblentz, Sci. Paper, Nat. Bur. Standards, No.380 (1920).

A. F. Joffè, Semi-Conducteurs Electroniques (Hermann & Cie, Paris, 1935).

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