Manufacture And Application Research Of Quantum-dot Converted LED Device With High Efficacy

This paper aims at solving the key problems of low luminous efficacy and narrow application range of the packaging structure optimization for the quantum-dot converted lightemitting diode(QCLED),and conducting a series of experimental studies on the basic manufacturing parameters of the quantum-dot color convertor(QCC)firstly.Based on the quantum-dot reabsorption issue,a widely usable QCC configuration scheme for most of the QCLEDs was provided;With this scheme and other key problems such as weak scattering and poor thermal stability of quantum dots,the luminous efficacy of dispensed-QCLED and remoteQCLED were promoted by incorporating scattering nano-particles and applying remote quantum-dot hemispherical shell respectively;Moreover,based on the lamp structure design,polymer nanofibers film were fabricated by electrospinning technique and inserted into the QCLED-based lamps to promote the luminous efficacy of the lamp system.The main research contents are as follow:(1)Study on the absorption and conversion characteristics of the QCCWith conversion loss as the standard and reabsorption characteristics as the main research object,a series of QCCs was prepared by evaporation curing process.The influence of quantum-dot concentration,QCC thickness,and current intensity on the CdSe/ZnS QCC was studied systematically,the influence of coating parameters on the resorption capacity of QCC was summarized,and the preparation experience of QCC with high conversion ability and low reabsorption loss was obtained.(2)Manufacturing and performance study of the high luminous efficacy quantum-dot converted light-emitting diodesTake the reabsorption characteristics as the basic guidance,combine other characteristic such as weak scattering ability and poor heat dissipation ability,a further research aiming at promoting the luminous efficacy of dispensed-QCLED and remote-QCLED was put forward.The impact of nano-ZnO particles incorporating concentration on the performance of the dispensed-QCLED was discussed.To promote the luminous efficacy,the dispensed-QCLED was manufactured with an optimal incorporating concentration;The luminous efficiency,color uniformity and heat dissipation capacity of the traditional planar QD film and novel hemispherical shell QD film were compared,a high luminous efficacy remote-QCLED was manufacturing followingly.(3)Manufacturing and performance study of the high luminous efficacy quantum-dotbased lampsBased on the lamp structure design,the scattering and reflection characteristics of polyacrylonitrile(PAN)polymer nanofiber films prepared by electrospinning were studied;With PAN films assembled on the reflector cup or substrate,the luminous efficacy of the white LED,outwards remote quantum-dot layer,inwards remote quantum-dot layer QCLED lamps were studied systematically,the QCLED lamps with high luminous efficacy were manufactured eventually.