Organic Light-Emitting Diodes Driven by Organic Transistors

Organic thin-film field-effect transistors (OTFTs) with pentacene as the semiconductor have been fabricated for driving an organic light-emitting diode (OLED). The driving circuit includes two OTFTs and one storage capacitor. The field-effect mobility of the transistors in the driving circuit is more than 0.3cm^2/Vs, and the     

Improved Performance of Organic Thin Film Transistor with an Inorganic Oxide/Polymer Double-Layer Insulator

We employ the Ta2Os/PVP （poly-4-vinylphenol） double-layer gate insulator to improve the performance of pentacene thin-film transistors. It is found that the double-layer insulator has low leakage current, smooth surface and considerably high capacitance. Compared to Ta205 insulator layers, the device with the Ta2Os/PVP doublelayer insulator exhibits an enhancement of the field-effect mobility from 0.21 to 0.54 cm2/Vs, and the decreasing threshold voltage from 4.38 V to -2.5 V. The results suggest that the Ta2Os/PVP double-layer insulator is a potential gate insulator for fabricating OTFTs with good electrical performance.     

金属元素替换对锌-铜基金属有机骨架材料的光吸收与能带特性的影响

选择常规的锌、铜作为金属离子、对苯二甲酸（BDC）作为有机配体，通过溶剂热法和元素替换法合成出Zn-Cu基MOFs材料。通过XRD、UV-Vis DRS、SEM、FT-IR、UPS和XPS等手段表征和研究，发现Zn（BDC）的光吸收位于紫外光波段（<400 nm），而Cu（BDC）光吸收拓宽至整个可见光波段（500~1 000 nm）。Zn-Cu金属离子均匀分散的产物Zn-Cu-BDC比其它产物具有更宽的光吸收范围、强度和更窄的带隙；不同的合成途径导致Zn-Cu基MOFs材料表现出性质差异。     

主链含PEO链段的聚对苯乙炔类蓝色电致发光共聚物

采用Ｗｉｔｔｉｇ反应合成了一种分子主链上烷氧基取代刚性共轭聚对苯乙炔（ＰＰＶ）民柔性聚氧化乙烯（ＰＥＯ）链段交替排列的、可溶于氯仿与四氢呋喃等普通有机溶剂的新型结构的聚对苯乙炔类功能性发光共聚物ＥＯ－ＰＰＶ。采用ＦＴ－ＩＲ、＾１Ｈ－ＮＭＲ、ＤＳＣ、ＧＰＣ、元素分析等手段对共聚物进行了表征,并制备了结构为（Ａｌ）Ｃａ／ＥＯ－ＰＰＶ／ＩＴＯ的单层电致发光器件、器件的最大发光波长位于４７５ｎｍ（蓝光）。     

葡萄糖氧化酶反应体系的动力学性质及在葡萄糖分析中的应用

本文运用紫外－可见光谱仪研究了葡萄糖氧化酶偶联辣根过氧化物酶－邻联茴香胺染料体系的催化动力学性质，通过控制酶和染料的含量，确定了反应呈假一级反应的葡萄糖浓度范围，在此反应体系中，葡萄糖浓度可以通过测定染料吸光度而获得，干扰小，回收率达９７％～１０３％。     

蒽／并四苯混晶的制备及其光谱性质

采用溶液法制备出一系列掺杂比例（摩尔比最高达100：1）的片状蒽／并四苯有机混晶,并对其进行了系统的表征。通过改变并四苯的掺杂浓度,可以实现对混晶发光颜色由蓝绿到绿进而到黄绿的调控。对蒽／并四苯混晶光学性质的研究发现,混晶的发射光谱中出现了并四苯的敏化荧光,同时葸的发光被部分地猝灭。并且在葸／并四苯混晶中,基质蒽的荧光衰减速率较其单晶时大大加快,而并四苯的发光寿命相对其单晶时则显著增大。上述实验结果表明该混晶体系中存在葸到并四苯的能量转移。     

Fabrication of Pentacene Thin-Film Transistors with Patterned Polyimide Photoresist as Gate Dielectrics and Research of Their Degradation

Pentacene organic thin-film transistors using commercial photoresist as gate dielectrics were fabricated. The photoresist was spin-coated and directly patterned by photolithography. As a result, the fabrication processes were greatly reduced. With the characteristics of the transistors measured, the degradation of the transistors was investigated. In the search for the factors causing degradation, a transistor using poly(methyl methacrylate) as the gate dielectric was also fabricated. It is regarded that the degradation is caused by the changes at the interface between photoresist and pentacene film.     

A New Method with Sandwiched Composite Films for Encapsulating Flexible OLEDs

We introduce a novel method for sandwiched-composite-film encapsulation that successfully extends the lifetime of flexible organic light-emitting diodes (FOLEDs). The encapsulation layers include two parts: one is a thin multilayer barrier coating, which is made up of two applications of alternating layers composed of a polymer layer (consisting of UV capable resins) and a ceramic layer (consisting of titanium nitride with excellent barrier performance), and the other is a thick polymer film of approximately 70μm in thickness fabricated by a doctor blade onto the thin encapsulation film described above. FOLEDs encapsulated by this novel method have a longer lifetime, and this lifetime is 74 times as much as the lifetime of unencapsulated ones.     

基于双极性小分子的单层非掺杂红色荧光有机发光二极管(英文)

以双极性小分子4,9-二(4-(2,2-二苯乙烯基)苯基)萘并[2,3-c][1,2,5]噻二唑(BDPNTD)为发光层,制备得到了单层非掺杂红色荧光有机发光二极管.通过在阳极ITO与有机层BDPNTD之间插入1nm厚的WO3或MoO3薄膜,获得了单层有机发光二极管:起亮电压为2.4V,最大发光亮度为4950cd·m-2,发光波长为636nm,CIE坐标约为(0.65,0.35).这证明了作为修饰层的WO3或MoO3薄膜可以改进ITO/BDPNTD界面的空穴注入,进而在器件中实现空穴与电子的平衡.     

Oxidative biomacromolecular damage from novel phthalocyanine

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