Platinum complexes as phosphorescent emitters in highly efficient organic light-emitting diodes

Applications of platinum complexes as phosphorescent emitters in high efficiency organic light-emitting diodes (OLEDs) were shortly discussed in this paper. Key recent studies on highly efficient blue, green, red and white-phosphorescent OLEDs based on Pt complexes are presented in terms of efficiency and color quality.     

基于FPGA与MC8051 IP核的可调窄脉冲激光泵浦源的研制

介绍了一种基于FPGA与MC8051IP核的可调窄脉冲激光泵浦系统.该系统主要作为低重复频率光信号的放大器泵浦源.系统采用MOSFET作为功率开关管驱动半导体激光器发出的光脉冲作为激光泵浦源,可驱动大功率的LD,最大驱动功率可达30W.利用高速FPGA芯片（EP2C8）和VHDL语言,设计激光泵浦源的窄脉冲数字控制电路.利用MC8051软IP核实现智能控制,系统输出脉冲周期、脉冲宽度以及脉冲幅度都可调.系统采用多种有效保护措施,性能稳定可靠.     

主体材料对磷光染料掺杂聚合物薄膜光谱性质的影响

研究了以（PPQ）2Ir（acac）为客体,分别以PFO、PVK、PFB和PFG四种不同聚合物为主体掺杂体系的光谱性质.各种材料的紫外-可见吸收光谱和光致发光光谱的性质表明PVK和PFO与客体之间可以发生有效的能量转移.此外,与光致发光谱不同,发光器件电致发光光谱有较纯的红光发射,表明除了能量转移之外,电荷捕获也是实现器件红色发光的主要原因之一.     

Identifying key issues for university practitioners of garden-based learning in Spain

ABSTRACT

The presence of learning gardens in Spain is growing, and the current scenario is highly diverse in relation to issues such as participatory models or purposes, among others. In the context of the 1^st National Meeting on organic learning gardens, we convened eight expert practitioners in a focus group. Their discourse was analyzed through content analysis, after which four categories were selected for co-occurrence analyses. The most important questions for university garden-based practitioners in the country are presented, related to actors involved, functions that gardens fulfill, strengths of these educational resources, and requirements for their consolidation.     

A MICROGAP SURGE ABSORBER FABRICATED USING CONVENTIONAL SEMICONDUCTOR TECHNOLOGY

ＩＮＴＲＯＤＵＣＴＩＯＮＶａｒｉｏｕｓｔｙｐｅｓｏｆｓｕｒｇｅａｂｓｏｒｂｅｒｓｔｏｐｒｏｔｅｃｔｖａｒｉｏｕｓｌｏｗ ｖｏｌｔａｇｅｅｌｅｃｔｒｉｃａｌｃｉｒｃｕｉｔｓｆｒｏｍｔｒａｎ ｓｉｅｎｔｏｖｅｒｖｏｌｔａｇｅｉｎｃｌｕｄｅ :( 1 )ｇａｓｄｉｓｃｈａｒｇｅｔｕｂｅ (ｇａｓｅｏｕｓｇａｐ) ,( 2 )ｖａｒｉｓｔｏｒｓ,( 3)ｓｅｍｉ ｃｏｎｄｕｃｔｏｒＴＶＳ (ｔｒａｎｓｉｅｎｔｖｏｌｔａｇｅｓｕｐｐｒｅｓｓｏｒ) .Ｅａｃｈｔｙｐｅｈａｓｉｔｓａｄｖａｎｔａｇｅｓａｎｄｄｉｓａｄｖａｎｔａｇｅｓ.Ｇａ…     

慢启动半导体激光器驱动电源的设计

根据半导体激光器的光功率与电流的关系,通过慢启动电路、纹波调零电路、功率稳恒电路等解决了使用中的电源在工作温度范围内其输出功率不稳定的问题。设计的电路稳定度达到4×10-4。     

有机化合物的水解反应及研究进展

该文对有机化合物的水解反应机理、应用及研究进展进行综述。     

微波合成半导体HgS纳米粒子

在甲醛溶液中，以Hg(Ac)2和TAA为原材料，通过微波加热合成了HgS半导体纳米粒子，并用XRD、TEM、紫外光谱进行了表征。     

有机化学实验考核方法的改革和探索

通过对传统有机化学实验考核方法弊端的分析,阐述了改革传统考核方法的必要性,建立了新的考核方法,设计了有机化学实验考核评估指标体系,并将评估指标转化为可操作的教学行为,促进了教与学,做到了全方位、客观地评价学生的实验课成绩。     

问题教学法在有机化学教学中的应用

探讨了有机化学教学中问题教学法的特点、分类、实施步骤和要点。