Inkjet-Printed Salt-Encapsulated Quantum Dot Film for UV-Based RGB Color-Converted Micro-Light Emitting Diode Displays

Ho, Shih‐Jung; Hsu, Hui‐Ching; Yeh, Chen-Pin; Chen, Hsueh‐Shih

doi:10.1021/acsami.0c05646

Cited by 73 publications

(58 citation statements)

References 49 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In 2018, Zhou et al used a microwave assisted heating method to mix QDs and sodium silicate aqueous solution within 30 s. The quantum yield of the prepared QD solution (69%) was more than twice that of the original QD solution (33%) [75]. In 2020, Ho et al prepared an RGB color conversion film using salt-sealed QD [79]. The salt layer covering the QD successfully protected the QD from oxygen, moisture, heat, and other external environments, thereby prolonging the reliability and service life of the QD-LED.…”

Section: Quantum Dot Color Conversion Ledsmentioning

confidence: 99%

Full-Color Realization of Micro-LED Displays

et al. 2020

Nanomaterials

140

View full text Add to dashboard Cite

Emerging technologies, such as smart wearable devices, augmented reality (AR)/virtual reality (VR) displays, and naked-eye 3D projection, have gradually entered our lives, accompanied by an urgent market demand for high-end display technologies. Ultra-high-resolution displays, flexible displays, and transparent displays are all important types of future display technology, and traditional display technology cannot meet the relevant requirements. Micro-light-emitting diodes (micro-LEDs), which have the advantages of a high contrast, a short response time, a wide color gamut, low power consumption, and a long life, are expected to replace traditional liquid-crystal displays (LCD) and organic light-emitting diodes (OLED) screens and become the leaders in the next generation of display technology. However, there are two major obstacles to moving micro-LEDs from the laboratory to the commercial market. One is improving the yield rate and reducing the cost of the mass transfer of micro-LEDs, and the other is realizing a full-color display using micro-LED chips. This review will outline the three main methods for applying current micro-LED full-color displays, red, green, and blue (RGB) three-color micro-LED transfer technology, color conversion technology, and single-chip multi-color growth technology, to summarize present-day micro-LED full-color display technologies and help guide the follow-up research.

show abstract

Section: Quantum Dot Color Conversion Ledsmentioning

confidence: 99%

Full-Color Realization of Micro-LED Displays

et al. 2020

Nanomaterials

140

View full text Add to dashboard Cite

show abstract

“…Quantum dots (QDs) are promising materials because of their fascinating optical properties such as size-tunable bandgap from UV to NIR, high luminescence efficiency, narrow emission bandwidth, and feasible synthetic process [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18]. Recent advances and progress in internet of the things (IOT), information technology, augmented reality & virtual reality (AR & VR), and wearable devices attract much attention in developing transparent devices and displays in both academia and industry [19.20].…”

Section: Background and Objectivementioning

confidence: 99%

65‐8: Transparent Electroluminescent QLEDs with High Brightness Double‐Side‐Emission Fabricated in Atmosphere

Yang

Lai

Sun

et al. 2021

Symp Digest of Tech Papers

Self Cite

View full text Add to dashboard Cite

Quantum dots (QDs) are promising materials and have been considered for self‐emitting electroluminescent QD light‐emitting‐diodes (QLEDs). In this work, we report a transparent QLED fabricated with middle‐sized QDs, which has a emission peak with the wavelength of 520 nm and the full‐width at half maximum (FWHM) of 17 nm, and the photoluminescence quantum yield of ~ 90%. The electroluminescent QLED device, fabricated in atmosphere, exhibits brightness of 125, 400 cd/m2, current efficiency of 34.23 cd/A, external quantum efficiency of 8.7 %, and transmittance of 70%.

show abstract

“…Micro-LEDs have the advantages of high brightness, long life, and high efficiency, in addition to the advantages of LCDs and OLEDs [16][17][18]. Micro-LEDs displays are self-luminous and use extremely small micro-LEDs chips as point light sources, thereby offering advantages of high luminous efficiency, long life, high color purity, high contrast, and high chemical stability [19][20][21]; however, such displays still have challenges, such as shrinkage of the micro-LEDs sizes and relatively high substrate accuracy of the equipment, thereby causing problems with the transfer technology of a large number of micro-LEDs [22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Highly Reflective Thin-Film Optimization for Full-Angle Micro-LEDs

Ho²,

Chen

2021

Nanoscale Res Lett

View full text Add to dashboard Cite

Displays composed of micro-light-emitting diodes (micro-LEDs) are regarded as promising next-generation self-luminous screens and have advantages such as high contrast, high brightness, and high color purity. The luminescence of such a display is similar to that of a Lambertian light source. However, owing to reduction in the light source area, traditional secondary optical lenses are not suitable for adjusting the light field types of micro-LEDs and cause problems that limit the application areas. This study presents the primary optical designs of dielectric and metal films to form highly reflective thin-film coatings with low absorption on the light-emitting surfaces of micro-LEDs to optimize light distribution and achieve full-angle utilization. Based on experimental results with the prototype, that have kept low voltage variation rates, low optical losses characteristics, and obtain the full width at half maximum (FWHM) of the light distribution is enhanced to 165° and while the center intensity is reduced to 63% of the original value. Hence, a full-angle micro-LEDs with a highly reflective thin-film coating are realized in this work. Full-angle micro-LEDs offer advantages when applied to commercial advertising displays or plane light source modules that require wide viewing angles.

show abstract

Inkjet-Printed Salt-Encapsulated Quantum Dot Film for UV-Based RGB Color-Converted Micro-Light Emitting Diode Displays

Cited by 73 publications

References 49 publications

Full-Color Realization of Micro-LED Displays

Full-Color Realization of Micro-LED Displays

65‐8: Transparent Electroluminescent QLEDs with High Brightness Double‐Side‐Emission Fabricated in Atmosphere

Highly Reflective Thin-Film Optimization for Full-Angle Micro-LEDs

Contact Info

Product

Resources

About