EVALUATION OF SIGMA V-97 SURFACE-PASSIVATED, PHOTOCONDUCTIVE CELLS

Abstract

This report covers the comparison of surfacepassivated and non- surface-passivated, CdS photoconductive cells for use as sun relays for solid state flashers. Both accelerated tests in a controlled humidity chamber and exposure tests were conducted. The exposure tests revealed that the surface- passivated cells had a significantly longer life than the non-surface-passivated cells. The normal failure of a non-surfacepassivated cell was to increase its resistance at a predetermined illuminance level while the failure of a surface- passivated cell was to decrease its resistance. The surface-passivated cell was not fail safe since it would not turn on the flasher until the ambient illuminance was much less than the predetermined level.

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Document Details

Document Type
Technical Report
Publication Date
Dec 11, 1964
Accession Number
AD0452744

Entities

People

  • P. O. Chapman

Organizations

  • United States Coast Guard

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Biological Phenomena
  • Candles
  • Cells
  • Coast Guard
  • Compound Semiconductors
  • Condensation
  • Ecological And Environmental Phenomena
  • Engineering
  • Environment
  • Fail Safe
  • Glass Seals
  • Heat Energy
  • Humidity
  • Materials
  • New York
  • Resistance
  • United States

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