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Improvement of crystallographic and electroluminescent characteristics of SrS:Ce thin film devices by post-deposition annealing in Ar-S atmosphere (1995)

Ohmi, Koutoku ; Fujimoto, Kazushi ; Tanaka, Shosaku ; [et al.]

[S.l.] : American Institute of Physics (AIP)

Journal of Applied Physics 78 (1995), S. 428-434

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ISSN: 1089-7550

Source: AIP Digital Archive

Topics: Physics

Notes: Post-deposition annealing in an Ar-S atmosphere at atmospheric pressure has been demonstrated to improve crystallographic properties and electroluminescent (EL) characteristics of SrS:Ce thin film EL devices. Crystallinity and degree of the orientation of the SrS:Ce thin films with polycrystalline columnar grains are improved by the annealing. It seems that recrystallization takes place between SrS grains. For the annealed devices, charge generation in the SrS:Ce layer is suppressed and relaxation of the phosphor field is decreased. As a result, an instantaneous EL efficiency at the leading edge emission is enhanced. The EL luminance and the average EL efficiency are increased. The annealed SrS:Ce thin-film EL device showed a luminance of 800 cd/m2 and an efficiency of 0.42 lm/W at 1 kHz drive. © 1995 American Institute of Physics.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1063/1.360621

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SDS-digested freeze-fracture replica labeling electron microscopy to study the two-dimensional distribution of integral membrane proteins and phospholipids in biomembranes: practical procedure, interpretation and application (1997)

Fujimoto, Kazushi

Springer

Histochemistry and cell biology 107 (1997), S. 87-96

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ISSN: 1432-119X

Source: Springer Online Journal Archives 1860-2000

Topics: Biology , Medicine

Notes: Abstract Recently, we have developed a quick-freezing/freeze-fracture replica labeling technique, sodium dodecyl sulfate (SDS)-digested freeze-fracture replica labeling (SDS-FRL), to study the two-dimensional distribution of cytochemical labeling on the membrane surface and the relationship of this distribution to images of freeze-fracture replicas created by platinum shadowing. In SDS-FRL, unfixed, quick-frozen cells, after freeze-fracture and platinum/carbon shadowing, are treated with SDS. The detergent dissolves unfractured areas of the cell membranes, with the release of the cytoplasmic contents. The cytoplasmic and exoplasmic membrane surfaces can be then labeled cytochemically. Integral membrane proteins, revealed as intramembrane particles by freeze-fracture replication, which are indistinguishable on a purely morphological basis, can be selectively labeled by SDS-FRL with specific antibody. In addition, this approach can be applied to examine the transmembrane phospholipid distribution in various cell and intracellular membranes. In this review, we describe the practical procedure for SDS-FRL in detail, present its application to labeling of various membrane components, and briefly discuss the possibility of a combination of SDS-FRL with atomic force microscopy.