title: Pulsed-laser micropatterned quantum-dot array for white light source.
abstract: In this study, a novel photoluminescent quantum dots device with laser-processed microscale patterns has been demonstrated to be used as a white light emitting source. The pulsed laser ablation technique was employed to directly fabricate microscale square holes with nano-ripple structures onto the sapphire substrate of a flip-chip blue light-emitting diode, confining sprayed quantum dots into well-defined areas and eliminating the coffee ring effect. The electroluminescence characterizations showed that the white light emission from the developed photoluminescent quantum-dot light-emitting diode exhibits stable emission at different driving currents. With a flexibility of controlling the quantum dots proportions in the patterned square holes, our developed white-light emitting source not only can be employed in the display applications with color triangle enlarged by 47% compared with the NTSC standard, but also provide the great potential in future lighting industry with the correlated color temperature continuously changed in a wide range.
authors.affiliation: Department of Photonics &Institute of Electro-Optical Engineering, National Chiao Tung University, Hsinchu 30010, Taiwan.
authors.forename: Sheng-Wen
authors.initials: SW
authors.lastname: Wang
authors.affiliation: Department of Photonics &Institute of Electro-Optical Engineering, National Chiao Tung University, Hsinchu 30010, Taiwan.
authors.forename: Huang-Yu
authors.initials: HY
authors.lastname: Lin
authors.affiliation: Institute of Photonic System, National Chiao Tung University, Tainan 711, Taiwan.
authors.forename: Chien-Chung
authors.initials: CC
authors.lastname: Lin
authors.affiliation: Department of Photonics &Institute of Electro-Optical Engineering, National Chiao Tung University, Hsinchu 30010, Taiwan.
authors.forename: Tsung Sheng
authors.initials: TS
authors.lastname: Kao
authors.affiliation: Department of Photonics &Institute of Electro-Optical Engineering, National Chiao Tung University, Hsinchu 30010, Taiwan.
authors.forename: Kuo-Ju
authors.initials: KJ
authors.lastname: Chen
authors.affiliation: Department of Photonics &Institute of Electro-Optical Engineering, National Chiao Tung University, Hsinchu 30010, Taiwan.
authors.forename: Hau-Vei
authors.initials: HV
authors.lastname: Han
authors.affiliation: Department of Photonics &Institute of Electro-Optical Engineering, National Chiao Tung University, Hsinchu 30010, Taiwan.
authors.forename: Jie-Ru
authors.initials: JR
authors.lastname: Li
authors.affiliation: Department of Photonics &Institute of Electro-Optical Engineering, National Chiao Tung University, Hsinchu 30010, Taiwan.
authors.forename: Po-Tsung
authors.initials: PT
authors.lastname: Lee
authors.affiliation: Department of Photonics &Institute of Electro-Optical Engineering, National Chiao Tung University, Hsinchu 30010, Taiwan.
authors.forename: Huang-Ming
authors.initials: HM
authors.lastname: Chen
authors.affiliation: Department of Electrical and Computer Engineering, National University of Singapore, 4 Engineering Drive 3, 117576 Singapore, Singapore.
authors.forename: Ming-Hui
authors.initials: MH
authors.lastname: Hong
authors.affiliation: Department of Photonics &Institute of Electro-Optical Engineering, National Chiao Tung University, Hsinchu 30010, Taiwan.
authors.forename: Hao-Chung
authors.initials: HC
authors.lastname: Kuo