Blue Phosphors for Thin Film Electroluminescent Displays

用于薄膜电致发光显示器的蓝色荧光粉

• 批准号: 9100144
• 负责人: Anton Greenwald
• 金额: $ 25万
• 依托单位: Spire Corporation
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-09-01 至 1995-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9100144&HistoricalAwards=false
• 关键词: Blue; Phosphors; Thin; Film; Electroluminescent

Thin film electroluminescent (TFEL) display technology now produces matrix-addressed self-luminous flat panels which come very close to providing the capability for high- definition color television. The principal obstacle to advancing this technology to full color video imaging is the need for a high brightness, saturated-blue phosphor. The objective of Phase I was to show that bright blue EL phosphor can be produced from chemical vapor deposited (CVD) zinc sulfide. Ion implantation was used to introduce many different activator elements into ZnS substrates. Blue photoluminescence was found from Tm- implanted ZnS; however, a combination of other ion implanted elements gave much stronger luminescence and a deep blue color. Rutherford backscattering analysis and X-ray diffraction indicate that ion implanted CVD thin films of ZnS have favorable stoichiometry and structure for TFEL devices, which will be fabricated and tested in Phase II. Spire proposes for Phase II to continue investigation of ion implanted blue electroluminescent phosphors. TFEL structures will be fabricated from CVD-grown ZnS thin films, implanted with the new blue- emitting dopants and co-dopants, implanted with control activators such as Mn and Tm, and evaluated for EL brightness, chromaticity and persistence. Some optimization of process and device fabrication parameters will be conducted. Ion implanted TFEL devices have enormous potential for low-cost three-color displays because all phosphor colors can be formed in the same thin film substrate.

薄膜电致发光 (TFEL) 显示技术现在可生产矩阵寻址自发光平板，该平板非常接近提供高清彩色电视的功能。 将该技术推进全彩色视频成像的主要障碍是需要高亮度、饱和蓝色荧光粉。 第一阶段的目标是证明可以用化学气相沉积 (CVD) 硫化锌生产亮蓝色 EL 荧光粉。 使用离子注入将许多不同的活化剂元素引入到 ZnS 基板中。 注入 Tm 的 ZnS 发出蓝色光致发光；然而，其他离子注入元素的组合产生了更强的发光和深蓝色。 卢瑟福背散射分析和 X 射线衍射表明，离子注入 CVD ZnS 薄膜具有适合 TFEL 器件的化学计量和结构，该器件将在第二阶段进行制造和测试。 Spire 建议第二阶段继续研究离子注入蓝色电致发光磷光体。 TFEL 结构将由 CVD 生长的 ZnS 薄膜制成，注入新的蓝光掺杂剂和共掺杂剂，注入 Mn 和 Tm 等控制激活剂，并评估 EL 亮度、色度和持久性。 将进行一些工艺和器件制造参数的优化。 离子注入薄膜电致发光器件在低成本三色显示器方面具有巨大潜力，因为所有荧光粉颜色都可以在同一薄膜基板上形成。