Trivalent lanthanide ions display fascinating optical properties. The discovery of the corresponding elements and their first industrial uses were intimately linked to their optical properties. This relationship has b...Trivalent lanthanide ions display fascinating optical properties. The discovery of the corresponding elements and their first industrial uses were intimately linked to their optical properties. This relationship has been kept alive until today when many high-technology applications of lanthanide-containing materials such as energy-saving lighting devices, displays, optical fibers and amplifiers, lasers, responsive luminescent stains for biomedical analyses and in cellulo sensing and imaging, heavily rely on the brilliant and pure-color emission of lanthanide ions. In this review we first outlined the basics of lanthanide luminescence with emphasis on f-f transitions, the sensitization mechanisms, and the assessment of the luminescence efficiency of lanthanide-containing emissive molecular edifices. Emphasis was then put on two fast developing aspects of lanthanide luminescence： materials for telecommunications and light emitting diodes, and biomedical imaging and sensing. Recent advances in NIR-emitting materials for plastic amplifiers and waveguides were described, together with the main solutions brought by researchers to minimize non-radiative deactivation of excited states. The demonstration in 1999 that erbium tris（8-hydroxyquinolinate） displayed a bright green emission suitable for organic light emitting diodes （OLEDs） was followed by realizing that in OLEDs, 25% of the excitation energy leads to singlet states and 75% to triplet states. Since lanthanide ions are good triplet quenchers, they now also play a key role in the development of these lighting devices. Luminescence analyses of biological molecules are among the most sensitive analytical techniques known. The long lifetime of the lanthanide excited states allows time-resolved spectroscopy to be used, suppressing the sample autofluorescence and reaching very low detection limits. Not only visible lanthanide sensors are now ubiquitously provided in medical diagnosis and in cell imaging, but the feasibility of using NIR emission of ions such 展开更多
针对液晶面板(Open/Cell,O/C)可靠度验证的需求,设计了基于图像重载模式加速O/C老化技术方案。由软件控制信号处理板的系统级芯片(System on Chip,So C)内部图形图像产生器,创建输出O/C所需的重载模式老化图像,减少对外部信号产生器的...针对液晶面板(Open/Cell,O/C)可靠度验证的需求,设计了基于图像重载模式加速O/C老化技术方案。由软件控制信号处理板的系统级芯片(System on Chip,So C)内部图形图像产生器,创建输出O/C所需的重载模式老化图像,减少对外部信号产生器的依赖。通过图像组合、图像播放顺序、图像播放时间等实验设计重载模式老化最优化,实现O/C在整机系统集成商大量生产时进行自动化老化验证测试,提高产品的可靠度。展开更多
金属氧化物薄膜晶体管（metal oxide thin film transistor，MOTFT）由于具有迁移率高、均匀性好、工艺简单、工艺温度低、成本低等优势，非常适合高分辨率、大尺寸液晶显示（LCD）和有源矩阵有机发光二极管显示（AMOLED）等新型显示技...金属氧化物薄膜晶体管（metal oxide thin film transistor，MOTFT）由于具有迁移率高、均匀性好、工艺简单、工艺温度低、成本低等优势，非常适合高分辨率、大尺寸液晶显示（LCD）和有源矩阵有机发光二极管显示（AMOLED）等新型显示技术发展的需要，因此受到业界和学界的广泛关注．结合本课题组的工作，本文阐述了MOTFT的材料、器件结构、制作工艺以及应用，并对影响MOTFT性能的因素进行了讨论．本课题组开发的新型MOTFT迁移率可达35cm^2／（Vs），阈值电压为1．63V，开关比为10^9，亚阈值摆幅为0．21Wdecade．基于自主开发的MOTFT背板，在国内率先实现了3—5英寸彩色AMOLED显示屏、透明AMOLED显示屏以及柔性AMOLED显示屏，展示了MOTFT背板良好的应用前景．展开更多
基金Project supported by the Swiss National Science Foundation
文摘Trivalent lanthanide ions display fascinating optical properties. The discovery of the corresponding elements and their first industrial uses were intimately linked to their optical properties. This relationship has been kept alive until today when many high-technology applications of lanthanide-containing materials such as energy-saving lighting devices, displays, optical fibers and amplifiers, lasers, responsive luminescent stains for biomedical analyses and in cellulo sensing and imaging, heavily rely on the brilliant and pure-color emission of lanthanide ions. In this review we first outlined the basics of lanthanide luminescence with emphasis on f-f transitions, the sensitization mechanisms, and the assessment of the luminescence efficiency of lanthanide-containing emissive molecular edifices. Emphasis was then put on two fast developing aspects of lanthanide luminescence： materials for telecommunications and light emitting diodes, and biomedical imaging and sensing. Recent advances in NIR-emitting materials for plastic amplifiers and waveguides were described, together with the main solutions brought by researchers to minimize non-radiative deactivation of excited states. The demonstration in 1999 that erbium tris（8-hydroxyquinolinate） displayed a bright green emission suitable for organic light emitting diodes （OLEDs） was followed by realizing that in OLEDs, 25% of the excitation energy leads to singlet states and 75% to triplet states. Since lanthanide ions are good triplet quenchers, they now also play a key role in the development of these lighting devices. Luminescence analyses of biological molecules are among the most sensitive analytical techniques known. The long lifetime of the lanthanide excited states allows time-resolved spectroscopy to be used, suppressing the sample autofluorescence and reaching very low detection limits. Not only visible lanthanide sensors are now ubiquitously provided in medical diagnosis and in cell imaging, but the feasibility of using NIR emission of ions such
文摘针对液晶面板(Open/Cell,O/C)可靠度验证的需求,设计了基于图像重载模式加速O/C老化技术方案。由软件控制信号处理板的系统级芯片(System on Chip,So C)内部图形图像产生器,创建输出O/C所需的重载模式老化图像,减少对外部信号产生器的依赖。通过图像组合、图像播放顺序、图像播放时间等实验设计重载模式老化最优化,实现O/C在整机系统集成商大量生产时进行自动化老化验证测试,提高产品的可靠度。
文摘金属氧化物薄膜晶体管（metal oxide thin film transistor，MOTFT）由于具有迁移率高、均匀性好、工艺简单、工艺温度低、成本低等优势，非常适合高分辨率、大尺寸液晶显示（LCD）和有源矩阵有机发光二极管显示（AMOLED）等新型显示技术发展的需要，因此受到业界和学界的广泛关注．结合本课题组的工作，本文阐述了MOTFT的材料、器件结构、制作工艺以及应用，并对影响MOTFT性能的因素进行了讨论．本课题组开发的新型MOTFT迁移率可达35cm^2／（Vs），阈值电压为1．63V，开关比为10^9，亚阈值摆幅为0．21Wdecade．基于自主开发的MOTFT背板，在国内率先实现了3—5英寸彩色AMOLED显示屏、透明AMOLED显示屏以及柔性AMOLED显示屏，展示了MOTFT背板良好的应用前景．
