Inkjet printed quantum dot film formed by controlling surface wettability for blue-to-green color conversion

Kim, Do Yeob; Han, Young Joon; Choi, Jun; Sakong, Chun; Ju, Byeong Kwon; Cho, Kwan Hyun

doi:10.1016/j.orgel.2020.105814

Cited by 24 publications

(17 citation statements)

References 23 publications

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“…Because the conventional UV/ozone treatment increases hydrophilicity, the prepared PeNC inks did not form stable CCLs. Patterning errors occurred when the droplets climbed up the existing bank wall and invaded adjacent pixels [41] , [42] . We found that CF 4 treatment lowered the surface energy of the banks and increased the hydrophobicity, thereby reducing the wettability of the PeNC inks.…”

Section: Resultsmentioning

confidence: 99%

Investigation of highly luminescent inorganic perovskite nanocrystals synthesized using optimized ultrasonication method

Lee

Jang²,

Lee³

et al. 2022

Ultrasonics Sonochemistry

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Section: Resultsmentioning

confidence: 99%

Investigation of highly luminescent inorganic perovskite nanocrystals synthesized using optimized ultrasonication method

Lee

Jang²,

Lee³

et al. 2022

Ultrasonics Sonochemistry

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“…The accuracy of the inkjet printing technique to form precise QD patterns was first demonstrated in 2009 by Haverinen et al [90,91] and then extended to printing on a wide variety of surfaces including photo-quality inkjet paper, cotton fabrics, PET films, and glass. [92][93][94] In 2020 Xuan et al demonstrated the association of QDs with micro light-emitting diodes (μLEDs) for use in high-resolution and full-color printed μLED displays. [27] However, even recent examples of quantum dot lightemitting diodes (QLEDs) are not efficient enough for use in commercial display applications.…”

Section: Inks For Optoelectonicsmentioning

confidence: 99%

Challenges, Prospects, and Emerging Applications of Inkjet‐Printed Electronics: A Chemist's Point of View

et al. 2022

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Driven by the development of new functional inks, inkjet‐printed electronics has achieved several milestones upon moving from the integration of simple electronic elements (e.g., temperature and pressure sensors, RFID antennas, etc.) to high‐tech applications (e.g. in optoelectronics, energy storage and harvesting, medical diagnosis). Currently, inkjet printing techniques are limited by spatial resolution higher than several micrometers, which sets a redhibitorythreshold for miniaturization and for many applications that require the controlled organization of constituents at the nanometer scale. In this Review, we present the physico‐chemical concepts and the equipment constraints underpinning the resolution limit of inkjet printing and describe the contributions from molecular, supramolecular, and nanomaterials‐based approaches for their circumvention. Based on these considerations, we propose future trajectories for improving inkjet‐printing resolution that will be driven and supported by breakthroughs coming from chemistry. Please check all text carefully as extensive language polishing was necessary. Title ok? Yes

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“…In the second approach, QD layers absorb light from displays such as liquid-crystal, light-emitting diode (LED), and organic-LED (OLED) displays and emit light by photoluminescence (PL). In both cases, the color gamut of displays is widened owing to the high color purity of QDs. − In particular, QD-OLED displays which combine a QD layer with OLEDs, are receiving considerable attention. , In QD-OLEDs, a QD layer is introduced on top of OLEDs, instead of combining the OLEDs with color filters. The OLED light is absorbed by the QD layer and the QD light is re-emitted, and because the OLED color is converted into the QD color, the QD layer is called a color conversion layer (CCL).…”

Section: Introductionmentioning

confidence: 99%

Efficient Quantum Dot Color Conversion Layer with Mixed Spherical/Rod-Shaped Scattering Particles

Park

Hahm

Cho

et al. 2023

ACS Appl. Opt. Mater.

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A quantum dot (QD) color conversion layer (CCL) with mixed-shaped scattering nanoparticles exhibits enhanced light conversion and reduced blue leakage in QD-organic light-emitting diodes (OLEDs). In this study, nontoxic bright red QDs and spherical and rod-shaped zinc oxide (ZnO) nanoparticles were mixed in an ultraviolet-curable resin without aggregation. The mixture of spherical and rod-shaped ZnO nanoparticles enhanced the blue light scattering inside the QD CCL, which results in an increase of the blue absorption by the QDs and a dramatic improvement of the color conversion. Extraction of the converted red light was also attributed to the Mie scattering of the rod-shaped scattering nanoparticles. The QD CCL with 15 wt % mixed-shaped scattering particles showed seven times increase of red intensity and four times decrease of blue intensity compared to that without scattering particles. We fabricated direct coat-type QD-OLEDs and confirmed that the color conversion and output/input efficiencies were improved and the blue leakage was decreased with increasing number of QD CCLs. This method improves the color conversion efficiency without increasing the amount of QDs and reducing the blue leakage without using a color filter.

show abstract

Inkjet printed quantum dot film formed by controlling surface wettability for blue-to-green color conversion

Cited by 24 publications

References 23 publications

Investigation of highly luminescent inorganic perovskite nanocrystals synthesized using optimized ultrasonication method

Investigation of highly luminescent inorganic perovskite nanocrystals synthesized using optimized ultrasonication method

Challenges, Prospects, and Emerging Applications of Inkjet‐Printed Electronics: A Chemist's Point of View

Efficient Quantum Dot Color Conversion Layer with Mixed Spherical/Rod-Shaped Scattering Particles

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