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Color conversion efficiency enhancement of colloidal quantum dot through its linkage with synthesized metal nanoparticle on a blue light-emitting diode

机译:用合成金属纳米粒子在蓝色发光二极管上的胶体量子点的颜色转换效率提高

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摘要

Four surface-modified and, hence, positively charged metal nanoparticles (NPs) of different localized surface plasmon (LSP) resonance wavelengths are synthesized for linking with negatively charged, red-emitting colloidal CdZnSeS/ZnS quantum dots (QDs) on the top surface of a blue-emitting InGaN/GaN quantum well (QW) light-emitting diode (LED) through electro-static force. The metal NP-QD linkage leads to a short distance between them for producing their strong surface plasmon (SP) coupling, such that QD absorption and emission can be enhanced. Meanwhile, the small p-GaN thickness in the LED results in strong SP coupling between the LSP resonance of metal NP and the QWs of the LED, leading to enhanced QW emission and, hence, stronger QD excitation. All those factors together result in the increase of the color conversion efficiency of the QD. (C) 2019 Optical Society of America
机译:四个表面改性的,因此,具有不同局部表面等离子体(LSP)共振波长的带正电荷的金属纳米颗粒(NPS),用于将带负电的红色发射胶体CDZNS / Zns量子点(QDS)连接在顶部表面上 通过电静电力的蓝色发射Ingan / GaN量子阱(QW)发光二极管(LED)。 金属NP-QD连杆导致它们之间的短距离用于制造它们的强表面等离子体(SP)耦合,使得可以提高QD吸收和发射。 同时,LED中的小型P-GaN厚度会导致金属NP的LSP共振与LED的QWS之间的强度SP耦合,从而提高QW排放,因此,QD激励更强。 所有这些因素在一起导致QD的颜色转换效率的增加。 (c)2019年光学学会

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