Publication detail

Aging characteristics of green-emitting Zn2GeO4:Mn alternating-current thin-film electroluminescent displays

AHMED, M.

Original Title

Aging characteristics of green-emitting Zn2GeO4:Mn alternating-current thin-film electroluminescent displays

English Title

Aging characteristics of green-emitting Zn2GeO4:Mn alternating-current thin-film electroluminescent displays

Type

journal article - other

Language

en

Original Abstract

Optical and aging characteristics of green-emitting Zn2GeO4:Mn alternating-current thin-film electro-luminescent (ACTFEL) displays are presented. Field-ionization of impact-excited Mn+2 luminescent impurities is found to give rise to positive space charge within the Zn2GeO4 phosphor, leading to unusual device behaviours such as conduction current delay, anomalous positive polarity transient luminance annihilation, transferred charge being comprised of mainly relaxation charge, and a decrease in the 50 Hz threshold voltage with increasing temperature. Low temperature aging experiments suggest that aging is at least partially due to hot electron-induced degradation. Although most Zn2GeO4:Mn ACTFEL devices exhibit a moderate amount of aging, certain devices are found to exhibit no measurable aging at 1 kHz when aged for 24 hours.

English abstract

Optical and aging characteristics of green-emitting Zn2GeO4:Mn alternating-current thin-film electro-luminescent (ACTFEL) displays are presented. Field-ionization of impact-excited Mn+2 luminescent impurities is found to give rise to positive space charge within the Zn2GeO4 phosphor, leading to unusual device behaviours such as conduction current delay, anomalous positive polarity transient luminance annihilation, transferred charge being comprised of mainly relaxation charge, and a decrease in the 50 Hz threshold voltage with increasing temperature. Low temperature aging experiments suggest that aging is at least partially due to hot electron-induced degradation. Although most Zn2GeO4:Mn ACTFEL devices exhibit a moderate amount of aging, certain devices are found to exhibit no measurable aging at 1 kHz when aged for 24 hours.

Keywords

ZnGeO4:Mn, electroluminescent device, aging

RIV year

2005

Released

10.06.2005

Publisher

VŠB-TU Ostrava

Location

Ostrava

Pages from

1

Pages to

6

Pages count

6

BibTex


@article{BUT46300,
  author="Mustafa M. Abdalla {Ahmed}",
  title="Aging characteristics of green-emitting Zn2GeO4:Mn alternating-current thin-film electroluminescent displays",
  annote="Optical and aging characteristics of green-emitting Zn2GeO4:Mn alternating-current thin-film electro-luminescent (ACTFEL) displays are presented. Field-ionization of impact-excited Mn+2 luminescent impurities is found to give rise to positive space charge within the Zn2GeO4 phosphor, leading to unusual device behaviours such as conduction current delay, anomalous positive polarity transient luminance annihilation, transferred charge being comprised of mainly relaxation charge, and a decrease in the 50 Hz threshold voltage with increasing temperature. Low temperature aging experiments suggest that aging is at least partially due to hot electron-induced degradation. Although most Zn2GeO4:Mn ACTFEL devices exhibit a moderate amount of aging, certain devices are found to exhibit no measurable aging at 1 kHz when aged for 24 hours.",
  address="VŠB-TU Ostrava",
  chapter="46300",
  institution="VŠB-TU Ostrava",
  journal="Transaction of the VŠB-Technical university of Ostrava, Mechanical series",
  number="2",
  volume="51",
  year="2005",
  month="june",
  pages="1--6",
  publisher="VŠB-TU Ostrava",
  type="journal article - other"
}