Optical Properties and X-ray Absorption Fine Structure Analysis of ZnS:Cu,Cl Thin-Film Phosphors

被引：1

作者：

Ichino, Kunio ^{[1
]}

Kato, Haruki ^{[1
]}

Sakai, Yuichiro ^{[1
]}

Ohmi, Koutoku ^{[1
]}

Honma, Tetsuo ^{[2
]}

Itoh, Jun-ichi ^{[3
]}

Sasakura, Asuka ^{[3
]}

机构：

[1] Tottori Univ, Dept Elect & Informat, Tottori 6808552, Japan

[2] Japan Synchrotron Radiat Res Inst, Sayo, Hyogo 6795198, Japan

[3] Mitsui Min & Smelting Co Ltd, Corp R&D Ctr, Ageo, Saitama 3620021, Japan

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS | 2010年 / 49卷 / 08期

基金：

日本学术振兴会;

关键词：

COPPER LUMINESCENCE; ZNS CRYSTALS; DEGRADATION; MECHANISM; SPECTROSCOPY; SUBSTRATE; EMISSION;

D O I：

10.1143/JJAP.49.082602

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

ZnS Cu,Cl thin-film phosphors have been studied for possible application to resin-free white light-emitting diodes (LEDs) The ZnS Cu,Cl polycrystalline films grown by a molecular-beam deposition technique at relatively high substrate temperatures exhibit strong blue-green photoluminescence (PL) The films with a relatively high (similar to 1%) Cu concentration exhibit an enhanced near-UV excitation band as well as strong PL, making them suitable for excitation by UV LEDs. however, the transmission in the visible spectral range decreases The X-ray absorption fine structure analysis of the phosphor films suggests that Cu atoms substitute for Zn sites at low Cu concentrations, whereas excess Cu atoms exist in a different form, possibly as CuS-like precipitates, at high Cu concentrations The addition of Al donors to the phosphor films enhances the PL intensity and transparency, resulting from a reduction in the amount of the precipitates (C) 2010 The Japan Society of Applied Physics

引用

页数：6