P‐239: <i>Late‐News Poster</i>: Quantum Dots for Display Applications, Thermal and Photostability through Shell Design

Nakonechnyi, I.; Zawacka, Natalia Klaudia; Proost, Kristof; Abé, Sofie; Smet, Philippe; Hens, Zeger

doi:10.1002/sdtp.11986

Symp Digest of Tech Papers

2017

DOI: 10.1002/sdtp.11986

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P‐239: Late‐News Poster: Quantum Dots for Display Applications, Thermal and Photostability through Shell Design

I. Nakonechnyi

Natalia Klaudia Zawacka

Kristof Proost³

et al.

Abstract: We analyze the stability of the photoluminescence efficiency of flash core/shell quantum dots (QDs). We show that shell design is crucial to suppress thermal quenching and long-term photodegradation, where a radial composition change from CdS to ZnS results in QDs that surpass the stability requirements of display applications.

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Cited by 2 publications

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“…Figure 5. Linewidth for CdSe QDs plotted versus peak wavelength.Symbols are data obtained from SID literature [e.g 18,19]. over the past ten years, and line is obtained by Eq.…”

mentioning

confidence: 99%

P‐59: The Linewidth Gaps for Quantum Dots and Micro LEDs

Ahmed

2021

Symp Digest of Tech Papers

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The emission linewidth of light emitters such as quantum dots and µLEDs significantly affect their performance in displays, but the gaps between experimental data and the fundamental limits have not been clearly quantified. Here, a survey of experimental data and simple theoretical models are used to delineate large linewidth gaps for both QDs and µLEDs for visible wavelengths. For CdSe QDs the linewidth gap is ~1.5‐3 times the fundamental limit. For InP QDs the linewidth gap is ~2‐4 times the fundamental limit. For GaN‐based µLEDs the gap is ~1.5‐3 times the fundamental linewidth limit. It is also shown that both state‐of‐the‐art OLEDs and GaN LEDs have similar linewidths over the visible wavelength range. Moreover, it is found that one of the value propositions of using inorganic GaN µLEDs (better color gamut) is yet to be demonstrated, and QDs as color conversion for red and green will likely prove beneficial until the “ideal state” of GaN based µLEDs can be proven/solved.

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“…Figure 5. Linewidth for CdSe QDs plotted versus peak wavelength.Symbols are data obtained from SID literature [e.g 18,19]. over the past ten years, and line is obtained by Eq.…”

mentioning

confidence: 99%

P‐59: The Linewidth Gaps for Quantum Dots and Micro LEDs

Ahmed

2021

Symp Digest of Tech Papers

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Highly Stable White Light-Emitting Diodes Based on Quantum-Dots Dispersed Into the Backlight Lens for Display Backlight

et al. 2019

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A novel package structure has been developed to fabricate quantum-dot (QD) white light-emitting diodes (WLEDs) by dispersing QDs into the backlight lens and integrating them with blue light-emitting diode to form white light. For this in-lens encapsulation structure, the luminous efficiency and lifetime of QD-WLEDs can reach 90 lm/W and 1000 h, which is 25 times longer than that of QD-WLEDs with on-chip encapsulation structure. Furthermore, a 32-inch prototype liquid crystal display TV shows a wide color gamut of 108% under the National Television Systems Committee standard with this in-lens encapsulation structure. The improvement performance should be attributed to providing a hermetic encapsulation environment preventing oxygen and water from reacting with the QDs and reducing the temperature of QDs due to in-lens package structure. Our results demonstrate that the in-lens solution can be a promising application in display backlight.

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P‐239: Late‐News Poster: Quantum Dots for Display Applications, Thermal and Photostability through Shell Design

Cited by 2 publications

References 6 publications

P‐59: The Linewidth Gaps for Quantum Dots and Micro LEDs

P‐59: The Linewidth Gaps for Quantum Dots and Micro LEDs

Highly Stable White Light-Emitting Diodes Based on Quantum-Dots Dispersed Into the Backlight Lens for Display Backlight

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