PTCDI-C_8作为阴极修饰层提高钙钛矿太阳能电池的性能（英文）

采用N,N'-二正辛烷基-3,4,9,10-苝四甲酰二亚胺(PTCDI-C8)对钙钛矿电池电子传输层(PCBM)进行界面修饰以减少PCBM与Al电极之间的漏电流,提高阴极的电子收集效率。通过调节PTCDI-C8薄膜的厚度优化界面接触和电子传输性能。实验结果表明:当PTCDI-C8薄膜的厚度为20 nm时得到的器件性能最优。光电转换效率(PCE)由5.26%提高到了8.65%,开路电压(Voc)为0.92 V,短路电流(Jsc)为15.68 m A/cm2,填充因子(FF)为60%。PTCDI-C8能够有效阻挡空穴向阴极传输,同时PTCDI-C8具有较高的电子迁移率以及较高的稳定性,在增加电子传输的同时,可减少环境对PCBM的侵蚀,提高了器件的稳定性。     

Influence of Dopant Concentration on Electroluminescent Performance of Organic White-Light-Emitting Device with Double-Emissive-Layered Structure

A novel phosphorescent organic white-light-emitting device （WOLED） with contiguration of ITO/NPB/CBP： TBPe：rubrene/Zn（BTZ）2：Ir（piq）2（acac）/Zn（BTZ）2/Mg：Ag is fabricated successfully, where the phosphorescent dye bis （1-（phenyl）isoquinoline） iridium （Ⅲ） acetylanetonate （Ir（piq）2 （acac）） doped into bis-（2-（2-hydroxyphenyl） benzothiazole）zinc （Zn（BTZ）2） （greenish-blue emitting material with electron transport character） as the red emitting layer, and fluorescent dye 2,5,8,11-tetra-tertbutylperylene （TBPe） and 5,6,11,12-tetraphenyl-naphthacene （rubrene） together doped into 4,4＇-N,N＇-dicarbazole-biphenyl （CBP） （ambipolar conductivity material） as the blue-orange emitting layer, respectively. The two emitting layers are sandwiched between the hole-transport layer N ,N＇-biphenyl-N , N＇-bis （1-naph thyl）-（1,1＇-biphenyl）-4, 4 Cdiamine （NP B） and electron-transport layer （Zn（BTZ）2 ） The optimum device turns on at the driving voltage of 4.5 V. A maximum external quantum efficiency of 1.53%. and brightness 15000 cd/m^2 are presented. The best point of the Commission Internationale de 1＇Eclairage （CIE） coordinates locates at （0.335, 0.338） at about 13 V. Moreover, we also discuss how to achieve the bright pure white light through optimizing the doping concentration of each dye from the viewpoint of energy transfer process.     

Fabrication and Characterization of C60-Based Organic Schottky Diodes

We have fabricated organic Schottky barrier diodes with Cu/LiF/C60/Al andwiched construction. Cu and Al are selected as the cathode and the anode, respectively. C60 is used as the organic layer and LiF as the buffer layer inserted between the cathode and C60. After the annealing process, Schottky contact is well formed at the Al/C60 interface and Ohmic contact is formed at the （Cu/LiF）/C60 interface. The current density-voltage （J-V） measurements of the diodes present nonlinear behavior. As a result, the rectification ratio reaches 1×03. The characteristics of the diodes have been analyzed using the energy band diagram. The values of Schottky barrier height ΦB, ideality factor n and reverse saturation current density Js are extracted according to the standard thermionic emission model.     

Highly efficient blue fluorescent OLEDs with doped double emitting layers based on p—n heterojunctions

We fabricate a kind of novel efficient blue fluorescent organic light emitting device(OLED) based on p-n heterojunctions composed of hole transporting layer(HTL) N,N ’-bis(naphthalen-1-yl)-N,N ’-bis(phenyl)-benzidine(NPB) and electron transporting layer(ETL) 4,7-diphnenyl-1,10-phenanthroline(BPhen),into which a new blue material,DNCA(a derivation of N 6,N 6,N 12,N 12-tetrap-tolylchrysene-6,12-diamine),is partially doped simultaneously,and double emitting layers are configured.With a turn-on voltage of 2.6 V at 1 cd/m 2,this type of OLED presents a maximum luminance efficiency(η max) of 8.83 cd/A at 5.818 mA/cm 2 and a maximum luminance of over 40000 cd/m 2.Meanwhile,the Commission Internationale De L’Eclairage(CIE) coordinates of this device change slightly from(0.13,0.27) to(0.13,0.23) as the driving voltage increases from 3 V to 11 V.This improvement in the electroluminescent characteristics is attributed mainly to the ideal p-n heterojunction which can confine and distribute excitons evenly on two sides of the heterojunction interface so as to improve the carrier combination rate and expand the light-emitting region.     

银纳米片等离子体效应增强有机太阳能电池及其性能优化研究

将银纳米片引入有机太阳能电池,增强了器件的光吸收及光电转换效率。制备得到了具有不同等离子共振吸收特性的银纳米片。当银纳米片的等离子共振吸收与活性层的吸收相匹配时,器件的光电流显著增强。通过改变银纳米片与活性层之间的距离,研究了等离子体共振增强电磁场的传递特性。两者的距离越近则耦合入活性层的电磁场越强,器件的光电流越高。经优化后,以P3HT∶PCBM为活性层的有机太阳能电池的光电转换效率由3.04%增长到3.82%,提高了26%。     

不同主体双发光层白色有机电致发光器件的性能研究

制备了结构为ITO/NPB/CBP:TBPe:rubrene/BAlq:Ir(piq)₂(acac)/BAlq/Alq₃/Mg:Ag的白色磷光有机电致发光器件.利用两种不同的主体材料,即用双载流子传输型主体材料CBP掺杂荧光染料TBPe及rubrene作为蓝光和橙黄光发光层;用电子传输型主体材料BAlq掺杂磷光染料Ir(piq)₂(acac)作为红色发光层.以上双发光层夹于空穴传输层NPB与具有电子传输性的阻挡层BALq之间.讨论了如何控制     

珠状纤维素的制备及其应用

珠状纤维素是一种新型的可反应性高分子材料，在生化物质的分离、纯化，生物工程和其他领域有良好的应用前景。本文系统地回顾了珠状纤维素的制备方法，对珠状纤维素的应用研究也作了简要介绍。     

一种多层白色磷光有机电致发光器件的制备及性能研究

制备了一种结构为ITO/NPB/NPB:Ir(piq)₂(acac)/CBP:TBPe/BAlq:rubrene/BAlq/Alq₃/Mg:Ag的白色磷光有机电致发光器件.其中空穴传输型主体NPB掺杂磷光染料Ir(piq)₂(acac)作为红色发光层,双载流子传输型主体4,4′-N,N′-dicarbazole-biphenyl (CBP)掺杂TBPe作为蓝色发光层,电子传输型主体材料BAlq掺杂rubrene作为绿色发光层.以上发光层夹于 关键词： 电致发光 磷光染料 异质结 白光     

发光层和空穴传输层对白色电致发光器件性能的影响

利用电子传输性能良好的苯并噻唑螯合锌(Zn(BTZ)₂)作为蓝光层，通过设计不同类型的空穴传输层并试验不同厚度的发光层后，制作了一种最佳厚度的双发光层白色电致发光器件：氧化铟锡(ITO)/N-N′-双(3-甲基苯基)-N-N′-二苯基-1-1′-二苯基-4-4′-二胺(TPD)∶N,N′-二(1-萘基)-N,N′-二苯基-1,1′-联苯-4-4′-二胺(NPB)(1∶0.0 关键词： 厚度 空穴传输层 白光 载流子     

树脂法分离纯化米洛培南

采用国产AAS大孔吸附树脂及D－280大孔脱色树脂对抗生素米洛培南制备母液进行分离纯化。实验表明，与日本Diaion公司生产的Diaion CHP20相比，AAS大孔吸附树脂对米洛培南具有更优良的吸附性能，使用D－280大孔脱色树脂对抗生素米洛培南制备母液进行脱色，未发现类似报道，分析结果证实，以上述方法制备的抗生素米洛培南收率高，纯度高，各项分析数据与文献报道相符。