58‐3: <i>Distinguished Paper:</i> High‐Efficient Quantum‐Dot Light‐Emitting Diodes with Blue Cadmium‐free Quantum Dots

Ryowa, Tatsuya; Ishida, Tadao; Sakakibara, Yusuke; Kitano, Keisuke; Ueda, Mitsuru; Izumi, Makoto; Ogura, Yutaka; Tanaka, Masanori; Nikata, Soichiro; Watanabe, Mayuko; Takasaki, Mikihiro; Itoh, Tetsuji; Miyanaga, Akiharu

doi:10.1002/sdtp.14007

Symp Digest of Tech Papers

2020

DOI: 10.1002/sdtp.14007

|View full text |Cite

58‐3: Distinguished Paper: High‐Efficient Quantum‐Dot Light‐Emitting Diodes with Blue Cadmium‐free Quantum Dots

Tatsuya Ryowa¹,

Tadao Ishida

Yusuke Sakakibara³

et al.

Abstract: We report outstanding electroluminescence properties of high efficient blue cadmium-free quantum dot light emitting diodes (QD-LED). External quantum efficiency (EQE) of 14.7% was achieved for QD-LED emitting at 428nm. Furthermore we developed high efficiency and narrow wavelength emission Zinc Selenide (ZnSe) nanocrystals emitting at 445nm and achieved QD-LED with an EQE of 10.7%. These new QDs have great potential to be used in next generation QD-LED display with wide colour gamut.

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...

Citation Types

Supporting

Mentioning

Contrasting

Year Published

2023

Publication Types

Select...

Article1

Relationship

Self Cite0

Independent1

Authors

Journals

Cited by 1 publication

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

Quantum-dot color wheel for projection displays

Yan,

Xiao,

Cai

et al. 2023

Optica

View full text Add to dashboard Cite

A color wheel (CW) is one of the most essential devices for contemporary projection displays because it provides the color initialization definition and determines the color performance of the whole system. However, conventional color wheels remain limited in terms of color performance and efficiency because of the light-absorbing material and time sequential color generation. Quantum dots, found in 1981 and known as a kind of quasi-zero-dimensional nanomaterial, exhibit excellent features for displays due to their quantum confinement effect, which won the 2023 Nobel Prize in Chemistry. Inspired by this, the paper systematically demonstrates a quantum-dot color wheel (QD-CW) device through theoretical derivation, simulation analysis, and experimental verification. The theoretical model to define the duty circle ratio is presented for the QD-CW and verified by Monte Carlo ray-tracing simulation. In terms of experimental verification, the QD-CW device is realized by multiple rounds of a photolithography process, and then assembled into a blue laser pumped projection prototype for full-color display. The chromaticity coordinates of white-balanced output are finally located at (0.317,0.338), which matches well with a standard D65 source. The color gamut area of the QD-CW device reaches 116.6% NTSC, and the average light conversion efficiency (LCE) of the prepared QD-CW is 57.0%. The proposed QD-CW device has ∼40% higher color gamut area and 1.2× higher LCE than a conventional CW device. These exciting findings show a groundbreaking approach to color generation in projection displays, which are expected to shed light on other high-quality display applications.

show abstract

Quantum-dot color wheel for projection displays

Yan,

Xiao,

Cai

et al. 2023

Optica

View full text Add to dashboard Cite

show abstract

scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.

Contact Info

customersupport@researchsolutions.com

10624 S. Eastern Ave., Ste. A-614

Henderson, NV 89052, USA

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

Blog Terms and Conditions API Terms Privacy Policy Contact Cookie Preferences Do Not Sell or Share My Personal Information

Made with 💙 for researchers

Part of the Research Solutions Family.

58‐3: Distinguished Paper: High‐Efficient Quantum‐Dot Light‐Emitting Diodes with Blue Cadmium‐free Quantum Dots

Cited by 1 publication

References 10 publications

Quantum-dot color wheel for projection displays

Quantum-dot color wheel for projection displays

Contact Info

Product

Resources

About