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14.1: Invited Paper: Stable, Ruggedized and Low Work Function Conductive Ceramics Display Materials
Author(s) -
Nakamoto Masayuki,
Moon Jonghyun
Publication year - 2018
Publication title -
sid symposium digest of technical papers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.351
H-Index - 44
eISSN - 2168-0159
pISSN - 0097-966X
DOI - 10.1002/sdtp.12663
Subject(s) - work function , ceramic , materials science , optoelectronics , oled , electrical conductor , diode , ultraviolet , work (physics) , x ray photoelectron spectroscopy , nanotechnology , composite material , mechanical engineering , physics , nuclear magnetic resonance , layer (electronics) , engineering
New low work function conductive ceramic materials have been developed by using multi‐sputtering method to realize reliable and low voltage operation display devices such as quantum dots light‐emitting diodes (QLEDs), organic light‐emitting diodes (OLEDs), field emission displays (FEDs) and so on. The work function of conductive ceramic materials exhibits as low as 1.8 eV, which were evaluated by using an ultraviolet photoelectron spectroscopy, that is the lowest work function among display materials, ever reported, being compared with 1.9 eV, 2.6 eV and 2.9 eV of Cs, LiF and Ca. Conventional low work function materials such as Cs, LiF and Ca, are highly reactive chemicals, so that those electrical properties are strongly degraded. However, regarding to experimental results, the low work function ceramic materials have the chemical stability. The extremely stable, ruggedized and low work function conductive ceramic materials are expected to be useful for realizing highly reliable and efficient QLEDs, OLEDs and FEDs.