67‐3: Unique Belt Plane Source Evaporation Techniques for the Mass Production of 2250ppi AMOLED and 77” QD OLED TV

Hwang, Changhun; Kim, Sung Su; Bang, Shin Woong; Choi, Se Ho; Chin, Byung Doo; Ko, Hokyoung

doi:10.1002/sdtp.13082

Cited by 5 publications

(1 citation statement)

References 6 publications

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“…So, it is impossible that the linear source evaporation produces the micro-OLED of AR display with 4um pattern width. [2] To produce very fine patterned OLED of 0.4um shadow distance and 4um pattern width, new concept evaporation technology is needed to provide around 10° of angle of incidence as a collimated organic molecular beam. (Fig 2)…”

Section: Introductionmentioning

confidence: 99%

11‐5: First Plane Source Evaporator for 100x100mm OLED

Hwang

Kim

Jeong

et al. 2021

Symp Digest of Tech Papers

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The plane source evaporator has been developed for the 100x100mm glass substrate for the first time. The shadow distance formed by an angle of incidence and the FMM thickness has been measured and the doped depth profile of green and blue EML layers have been observed in the plane source evaporation. The submicron scale shadow distances were as 0.2~0.76um and the doping profiles appears quite uniform. Therefore, it is promising for very high ppi OLED and high brightness OLED to develop by the plane source evaporation techniques.

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Section: Introductionmentioning

confidence: 99%

11‐5: First Plane Source Evaporator for 100x100mm OLED

Hwang

Kim

Jeong

et al. 2021

Symp Digest of Tech Papers

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Impact of Sidewall Conditions on Internal Quantum Efficiency and Light Extraction Efficiency of Micro‐LEDs

Park

Pristovsek

Cai

et al. 2023

Advanced Optical Materials

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The sidewall condition is a key factor determining the performance of micro-light emitting diodes (μLEDs). In this study, we prepared equilateral triangular III-nitride blue μLEDs with exclusively m-plane sidewall surfaces to confirm the impact of sidewall conditions. It was found that inductively coupled plasma-reactive ion etching (ICP-RIE) caused surface damages to the sidewall and resulted in rough surface morphology. As confirmed by time-resolved photoluminescence (TRPL) and X-ray photoemission spectroscopy (XPS), tetramethylammonium hydroxide (TMAH) eliminated the etching damage and flattened the sidewall surface. After ICP-RIE, 100 µm 2 -micro-LEDs (µLEDs) yielded higher external quantum efficiency (EQE) than 400 µm 2 -µLEDs. However, after TMAH treatment, the peak EQE of 400 µm 2 -µLEDs increased by around 10% in the low current regime, whereas that of 100 µm 2 -µLEDs slightly decreased by around 3%. The EQE of the 100 µm 2 -µLED decreased after TMAH treatment although the internal quantum efficiency (IQE) increased. Further, the IQE of the 100 µm 2 -µLEDs before and after TMAH treatment was insignificant at temperatures below 150 K, above which it became considerable. Based on PL, XPS, scanning transmission electron microscopy, and scanning electron microscopy results, mechanisms for the size dependence of the EQE of µLEDs are explained in terms of non-radiative recombination rate and light extraction.

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P‐160: Curing Mechanism and Optimal Solution for Interior Disclination in Ultrahigh‐definition 2‐domain VA LCD

Zhang

Cao

Zhang

et al. 2020

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Domain reduction design has been proposed to improve the transmittance in the ultrahigh definition display. The inherent confusing concern about the convergence of dark fringe gets completely understood through investigating the vertical alignment procedure. Electric field modulation by terrain and voltage contributes to a favorable LC alignment upon data line BM less structure. Consequently, the interior LC disclination is induced to converge to the inter-sub-pixel and the transmittance can be effectively improved.

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67‐3: Unique Belt Plane Source Evaporation Techniques for the Mass Production of 2250ppi AMOLED and 77” QD OLED TV

Cited by 5 publications

References 6 publications

11‐5: First Plane Source Evaporator for 100x100mm OLED

11‐5: First Plane Source Evaporator for 100x100mm OLED

Impact of Sidewall Conditions on Internal Quantum Efficiency and Light Extraction Efficiency of Micro‐LEDs

P‐160: Curing Mechanism and Optimal Solution for Interior Disclination in Ultrahigh‐definition 2‐domain VA LCD

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