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3D quantum dot-lens fabricated by stereolithographic printing with in-situ UV curing for lighting and displays
Composites Part B: Engineering ( IF 13.1 ) Pub Date : 2021-09-24 , DOI: 10.1016/j.compositesb.2021.109350
Nian-Ting Jung , Pin-Ru Chen , Shih-Jung Ho , Cheng-Che Tung , Po-Yu Chen , Hsueh-Shih Chen

3D polymer/quantum dots (QDs) nanocomposite QD-lens is fabricated by stereolithography (SLA) 3D printer with in-situ UV curing system. Various UV-curable polymer precursors are mixed with QDs to investigate their printability and optical performance. 2D QD-thin film and 3D QD-lens are printed and attached to a blue InGaN chip to form a light-emitting diode (LED) device. An air gap between the 3D QD-lens and the chip provides more uniform light emission at different angles and better heat dissipation. Compared with conventional QD-on-chip LED, the 3D QD-lens LED operated at 20 mA has ∼100% enhancement of half-lifetime (T50) in a standard reliability test. The LED T50 can be further improved 75% by coating the QD-lens with hydrophobic parylene as a gas barrier layer against water and oxygen. By mixing both green- (G-) and red- (R-) QDs in the 3D QD-lens, a white light-emitting 3D QD-lens LED is demonstrated to possess a color gamut of ∼130% NTSC standard.



中文翻译:

用于照明和显示器的 3D 量子点透镜通过原位 UV 固化立体光刻印刷制造

3D 聚合物/量子点 (QD) 纳米复合材料 QD 透镜是通过立体光刻 (SLA) 3D 打印机和原位 UV 固化系统制造的。各种紫外线固化聚合物前体与 QD 混合,以研究它们的可印刷性和光学性能。2D QD 薄膜和 3D QD 透镜被印刷并附着在蓝色 InGaN 芯片上,以形成发光二极管 (LED) 器件。3D QD 透镜和芯片之间的气隙可在不同角度提供更均匀的发光和更好的散热。与传统的 QD-on-chip LED 相比,在标准可靠性测试中,在 20 mA 下工作的 3D QD-lens LED 的半衰期 (T 50 )提高了约 100% 。LED T 50通过在 QD 透镜上涂上疏水性聚对二甲苯作为防水和氧气的阻气层,可以进一步提高 75%。通过在 3D QD 透镜中混合绿色(G-)和红色(R-)QD,白光发光 3D QD 透镜 LED 被证明具有~130% NTSC 标准的色域。

更新日期:2021-09-30
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