OREGON STATE UNIVERSITY

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Evidence for space charge in atomic layer epitaxy ZnS:Mn alternating-current thin-film electroluminescent devices

TitleEvidence for space charge in atomic layer epitaxy ZnS:Mn alternating-current thin-film electroluminescent devices
Publication TypeJournal Article
Year of Publication1993
AuthorsDouglas, A. A., J. F. Wager, D. C. Morton, J. B. Koh, and C. P. Hogh
JournalJournal of Applied Physics
Volume73
Issue1
Pagination296
Date Published01/1993
ISSN00218979
Keywordsac systems, electroluminescence, epitaxial layers, manganese additions, optoelectronic devices, space charge, thin films, zinc sulfides
Abstract

Electrical and optical measurements of ZnS:Mn alternating‐current thin‐film electroluminescent (ACTFEL) devices grown by atomic layer epitaxy provide evidence for the existence of space charge within the bulk ZnS layer. Blue luminescence is observed during the falling edge of an applied voltage pulse when the ACTFEL device is operated at low temperature. This blue luminescence is attributed to donor‐acceptor pair radiative recombination in which chlorine is identified as the donor and a zinc vacancy as the acceptor. This luminescence identification leads to determination of the origin of space charge as arising from impact ionization of the zinc vacancy.

DOI10.1063/1.353903
Short TitleJ. Appl. Phys.