Physical Review A, volume 102, issue 5, pages 1258-1262

Photosensitization of PbS Films

R H Harada ¹

H. T. Minden ¹

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Chicago Midway Laboratories, The University of Chicago, Chicago, Illinois |

Publication type: Journal Article

Publication date: 1956-06-01

American Physical Society (APS)

Journal: Physical Review A

Quartile SCImago

Quartile WOS

Impact factor: 2.9

ISSN: 24699926, 24699934, 0031899X, 10502947, 10941622

DOI: 10.1103/physrev.102.1258

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General Physics and Astronomy

Abstract

The effect of ${\mathrm{O}}_{2}$ on the photoconductive response of evaporated PbS films has been experimentally investigated. The dark conductance $g$, the photoconductance $\ensuremath{\Delta}g$, and the time constant $\ensuremath{\tau}$ for the photoconductive response of PbS evaporated films vary when the films are exposed to oxygen. Initially $g$ decreases several orders of magnitude when an outgassed film is exposed to oxygen; it reaches a minimum and then increases. The thermoelectric power changes from negative to positive at the minimum in conductance. $\ensuremath{\Delta}g$ and $\ensuremath{\tau}$ are given as a function of $g$. $\ensuremath{\Delta}g$ decreases with increasing oxygenation, reaches a minimum near the minimum in $g$ and then increases as $g$ increases after the film becomes $p$-type; $\frac{\ensuremath{\Delta}g}{g}$ is a maximum, however, near the minimum in $g$. On the other hand, $\ensuremath{\tau}$ increases steadily as the film changes from $n$- to $p$-type.These results are attributed to the effect of two oxygen surface states. A low-lying ${\mathrm{O}}^{\ensuremath{-}}$ state alters the Fermi level of the originally $n$-type film. The surface charge thus formed lowers the effective carrier mobility. A higher energy ${\mathrm{O}}^{\ensuremath{-}\ensuremath{-}}$ state, when empty, traps photoelectrons and hence enhances the hole photoconductivity.

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Harada R. H., Minden H. T. Photosensitization of PbS Films // Physical Review A. 1956. Vol. 102. No. 5. pp. 1258-1262.

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Harada R. H., Minden H. T. Photosensitization of PbS Films // Physical Review A. 1956. Vol. 102. No. 5. pp. 1258-1262.

RIS |

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RIS Copy

TY - JOUR

DO - 10.1103/physrev.102.1258

UR - https://doi.org/10.1103/physrev.102.1258

TI - Photosensitization of PbS Films

T2 - Physical Review A

AU - Harada, R H

AU - Minden, H. T.

PY - 1956

DA - 1956/06/01 00:00:00

PB - American Physical Society (APS)

SP - 1258-1262

IS - 5

VL - 102

SN - 2469-9926

SN - 2469-9934

SN - 0031-899X

SN - 1050-2947

SN - 1094-1622

ER -

BibTex |

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BibTex Copy

@article{1956_Harada,

author = {R H Harada and H. T. Minden},

title = {Photosensitization of PbS Films},

journal = {Physical Review A},

year = {1956},

volume = {102},

publisher = {American Physical Society (APS)},

month = {jun},

url = {https://doi.org/10.1103/physrev.102.1258},

number = {5},

pages = {1258--1262},

doi = {10.1103/physrev.102.1258}

}

MLA

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MLA Copy

Harada, R. H., and H. T. Minden. “Photosensitization of PbS Films.” Physical Review A, vol. 102, no. 5, Jun. 1956, pp. 1258-1262. https://doi.org/10.1103/physrev.102.1258.

Found error?

Publisher

American Physical Society (APS)

Journal

Physical Review A

Quartile SCImago

Quartile WOS

Impact factor

2.9

ISSN

24699926 (Print)
24699934 (Electronic)
0031899X (Print)
10502947 (Print)
10941622 (Electronic)