Park, Joon-Suh Kyhm, Jihoon Kim, Hong Hee Jeong, Shinyoung Kang, JoonHyun Lee, Song-ee Lee, Kyu-Tae Park, Kisun Barange, Nilesh Han, JiYeong Song, Jin Dong Choi, Won Kook Han, Il Ki 2024-01-20T03:02:12Z 2024-01-20T03:02:12Z 2021-09-05 2016-11 1530-6984 https://pubs.kist.re.kr/handle/201004/123478 Although various colloidal quantum dot (QD) coating and patterning techniques have been developed to meet the demands in optoelectronic applications over the past years, each of the previously demonstrated methods has one or more limitations and trade-offs in forming multicolor, high-resolution, or large-area patterns of QDs. In this study, we present an alternative QD patterning technique using conventional photolithography combined with charge-assisted layer-by-layer (LbL) assembly to solve the trade-offs of the traditional patterning processes. From our demonstrations, we show repeatable QD patterning process that allows multicolor QD patterns in both large-area and microscale. Also, we show that the QD patterns are robust against additional photolithography processes and that the thickness of the QD patterns can be controlled at each position. To validate that this process can be applied to actual device applications as an active material, we have fabricated inverted, differently colored, active QD light-emitting device (QD-LED) on a pixelated substrate, which achieved maximum electroluminescence intensity of 23 770 cd/m(2), and discussed the results. From our findings, we believe that our process provides a solution to achieving both high-resolution and large-scale QD pattern applicable to not only display, but also to practical photonic device research and development. English AMER CHEMICAL SOC LIGHT-EMITTING-DIODES HIGH-EFFICIENCY SOLAR-CELLS MULTILAYER DEVICES FILMS NANOPARTICLES NANOCRYSTALS NANOSCALE CDSE Alternative Patterning Process for Realization of Large-Area, Full-Color, Active Quantum Dot Display Article 10.1021/acs.nanolett.6b03007 1 NANO LETTERS, v.16, no.11, pp.6946 - 6953 NANO LETTERS 16 11 6946 6953 scie scopus 000387625000034 2-s2.0-84994479598 Chemistry, Multidisciplinary Chemistry, Physical Nanoscience & Nanotechnology Materials Science, Multidisciplinary Physics, Applied Physics, Condensed Matter Chemistry Science & Technology - Other Topics Materials Science Physics Article LIGHT-EMITTING-DIODES HIGH-EFFICIENCY SOLAR-CELLS MULTILAYER DEVICES FILMS NANOPARTICLES NANOCRYSTALS NANOSCALE CDSE Colloidal quantum dots patterning light-emitting device photolithography