Light Emitting Device Based On CdSe Quantum Dot And Study Of Array Crosstalk

In recent years, quantum dot light emitting diode (QD-LED) has made great progressin many researches, and using CdSe quantum dots(QDs) as luminescent materials formaking QD-LED has got more and more extensive attention. Until now, themaximum brightness of red, green, blue CdSe QD-LED have been31000cd/m24200cd/m2and68000cd/m2. The performance of QD-LED in other areas are almostmore than the organic light emitting diode (OLED).This paper mainly studies the principle, manufacturing process and theperformance of CdSe QD-LED. At the same time we explore the array problems andsolutions of QD-LED. First, we used the method of Successive Ion Layer Adsorptionand Reaction(SILAR) to synthesize CdSe/CdS/ZnS core-shell QDs. Then we usedthe CdSe/CdS/ZnS QDs to fabricate QD-LED. QD-LED was designed andfabricated using quantum dot light-emitting diodes. CdSe/CdS/ZnS core/shell QDswere employed as the emitting layer sandwiched bypoly(N,N′-bis(4-butylphenyl)-N,N′-bis(phenyl)benzidine)(Poly-TPD) and anelectron transport layer of ZnO nanoparticles. By adjusting the size of QDs, thecolors of QD-LED can be red, orange, yellow and green.In addition, we also fabricated QD-LED using graphene as anode. At the sametime, we compared luminous efficiency and brightness of the graphene based LEDand the ITO based LED. It has verified the bright prospect of graphene as conductivefilm. We also fabricated8segment display and the5×5lattice display based onQD-LED. the production process, found serious crosstalk, finally we use Mo2Oxinstead of PEDOT as a hole injecting layer, to solve the PEDOT transverse conductivity caused by excessive crosstalk. During the fabrication, the problem ofserious crosstalk effected our experiment, finally we use MoOxas the hole injectionlayer instead of PEDOT to solve the problem. The uniformity of the devices wereanalyzed based on the current-density and luminance versus driving voltage. Thegood uniformity indicates that the as-designed device is useful and promising forgeneral electroluminescent display applications.