Mechanisms of dark conductivity and photosensitivity in PbSe polycrystalline films on glass and Si substrates

Vladimir V. Tetyorkin; V. B. Orletskii; Fiodor F. Sizov; N. O. Tashtanbajev; Alexandr G. Stepanushkin

doi:10.1117/12.167103

1 May 1994 Mechanisms of dark conductivity and photosensitivity in PbSe polycrystalline films on glass and Si substrates

Vladimir V. Tetyorkin, V. B. Orletskii, Fiodor F. Sizov, N. O. Tashtanbajev, Alexandr G. Stepanushkin

Author Affiliations +

Optical Engineering, Vol. 33, Issue 5, (May 1994). https://doi.org/10.1117/12.167103

Abstract

Temperature dependencies of dark electrical characteristics (Hall effect and conductivity) are investigated in PbSe polycrystalline films with different crystallite sizes deposited on glass and Si substrates. In these films the spectral dependencies of photoelectrical characteristics and the lifetime of photoexcited carriers on the crystallite sizes are studied. It is shown that the experimental data may be explained by the existence of the potential barriers for the majority carriers (holes) at the grain boundaries. The height of the barriers is found to depend on the crystallite sizes. PbSe photosensitive structures with detectivity D^*λ = 2 x 10¹⁰ cm Hz^½/W at room temperatures are fabricated on glass substrates. On Si substrates, the detectivity values of PbSe polycrystalline photodetectors were an order lower.

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Vladimir V. Tetyorkin, V. B. Orletskii, Fiodor F. Sizov, N. O. Tashtanbajev, and Alexandr G. Stepanushkin "Mechanisms of dark conductivity and photosensitivity in PbSe polycrystalline films on glass and Si substrates," Optical Engineering 33(5), (1 May 1994). https://doi.org/10.1117/12.167103

Published: 1 May 1994

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