近红外高感光度有机光导体—Y—氧钛酞菁的研究

随着半导体激光（ＬＤ）在技术上的不断成熟,其作为激光印字机、图象照排机、数字打样机、以及数字印刷机的扫描光源被广泛应用,开发研制近红外光谱区高感光度的有机光导体成为目前光导体研究的一个前沿．在静电照相用有机光导体中,以酞菁类有机光导体最为引人注目,多...     

A photoconductor based on heavily Al-doped nano-ZnO thin film and its application to a chaos generator

Nano-ZnO thin film with heavy Al doping was deposited on Si substrate by RF magnetron sputtering, and a photoconductor was fabricated on the nano-ZnO thin film using Au as contact metal, producing with a metal–semiconductor–metal structure. The photoconductor was then applied to Chua's circuit through element replacement. Simulation results demonstrated that a triple-scroll optoelectronic chaotic attractor can be generated in the modified Chua's circuit.     

激光打印技术中传输材料的研究状况

总结了前人对有机电荷传输材料的研究所取得的进展,讨论了充子传输的因素,分析了这类材料研究工作的发展趋势。     

Conduction mechanism of metal-free phthalocyanine single crystals as a function of temperature

Metal-free phthalocyanine (H₂Pc) single crystals grown by vacuum sublimation were investigated for their conductivity (both in dark and light). The investigations consisted of dark- and photo-current variations with (i) applied electric field and (ii) temperature. The applied electric field ranged from 0·8 kV/cm to 6 kV/cm. The temperature range was from 300°K to around 570°K. The crystals were found to be photoconductive. Based on activation energies calculated from photoconductivity due to temperature dependence, an energy level scheme for H₂Pc single crystals is proposed. The model consists of two trapping levels within the forbidden gap — one at 0·4 eV below the conduction band edge from which electrons are thermally excited into the conduction band and the other acts as recombination centre at 0·3 eV above the valence band edge. The band gap is calculated to be 1·4 eV. Comparative study of the proposed model with that of earlier investigations on the same crystals of the H₂Pc is in good agreement, thereby indicating that H₂Pc is thermally stable even at relatively higher temperature as semiconductor.     

Cationic polymerization of 3,6- dibromo-9(2,3-epoxypropyl) carbazole in the presence of allyl alcohol or acrylic acid

Polymerization of 3,6-dibromo-9-(2,3-epoxypropyl) carbazole with SnCl₄ in the presence of allyl alcohol or acrylic acid has been studied. This reaction has proved to be a convenient method of obtaining macromonomers containing allyl or acrylic functional groups. It was shown that both in the presence of allyl alcohol and acrylic acid polymerization proceeds by an activated monomer mechanism. Allyl alcohol and acrylic acid at the initial stage of reaction play the role of starting proton donor compound. However in contrast to allyl alcohol, acrylic acid is not totally consumed. Peculiarities of the mechanism of propagation are discussed.     

机能分离型有机光电导体及其进展

介绍了机能分离型有机光电导体的感光版结构、光电导的基本原理及制作方法，并对载流子产生材料和载流子传输材料及其发展趋势进行了讨论．     

基于单片机控制的自动往返电动小汽车

本文介绍基于单片机AT89C51控制的自动往返电动小汽车控制系统的硬件和软件设计。     

互易律对有机光导体感光特性影响的研究

互易律对有机光导体的感光性能有何影响，通过对制备的以Y－TiOPc为电荷产生材料的有机光导体所作的测试实验，证明有机光导体并不遵守互易律，其感光度随光强的增加而降低，由于在光谱780－840nm波长范围内具有很高的感光度，故特别适合半导体激光扫描的要求。     

偶氮化合物的光电导性能的研究

本文合成了五种双偶氮颜料 ,它们是以芴酮为桥基 ,以含有五种不同取代基的色酚为偶合剂的化合物 .测定了这些化合物的吸收光谱和X射线衍射光谱 ;分别以这五种偶氮颜料为电荷产生材料制备了功能分离型双层光电导体 ,并对它们的光电导性能进行了研究 .