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Photonics
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Quantum Dot Light-Emitting Diodes: Innovations and Applications
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Quantum Dot Light-Emitting Diodes: Innovations and Applications

A special issue of Photonics (ISSN 2304-6732).

Deadline for manuscript submissions: 31 December 2025 | Viewed by 1690

Special Issue Editors

Dr. Chengzhao Luo

E-Mail Website
Guest Editor
School of Optoelectronic Science and Engineering & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215006 China
Interests: quantum dots; luminescent materials and devices
Dr. Chenghao Bi

E-Mail Website
Guest Editor
College of Physics and Optoelectronic Engineering, Harbin Engineering University, Harbin 150001, China
Interests: quantum dots; perovskite; light-emitting diodes; nanocrystals; ultrafast spectra
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Quantum dot light-emitting diodes (QD-LEDs) are one of the most promising self-luminous displays in terms of luminous efficiency, wavelength tunability and cost. Future applications using QD-LEDs range from wide color gamut and large screen displays to augmented/virtual reality displays, wearable/flexible displays, in-vehicle displays and transparent displays, which require high performance in terms of contrast, viewing angle, response time and power consumption. The theoretical efficiency of a single component is achieved by customizing the QD structure and optimizing the charge balance in the charge transport layer to improve efficiency and lifetime. The maximum external quantum efficiency and lifetime of QD-LEDs have now taken a quantum leap and are increasingly eligible for commercialization. However, many challenges remain for the key factors determining the performance of QD-LEDs, such as the emitter, hole/electron transport layer and device structure.

This Special Issue invites contributions describing the latest advances in quantum dot light-emitting diodes. All theoretical, numerical and experimental papers are accepted. Topics include, but are not limited to, the following:

  • Design and development of efficient quantum dot light-emitting diode transmission layers;
  • Research on the performance degradation mechanism of quantum dot light-emitting diode devices;
  • High-resolution quantum dot light-emitting diode techniques;
  • Novel quantum dot light-emitting materials;
  • Integration of quantum dots with micro-LED/mini-LED;
  • Highly efficient perovskite quantum dot light-emitting diodes;
  • Stabilized perovskite quantum dot light-emitting material manufacturing technology;
  • Quantum dot light-emitting diode application;
  • Quantum dot color conversion luminescent thin-film backlighting technologies;
  • Quantum dot patterning technologies.

Dr. Chengzhao Luo
Dr. Chenghao Bi
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Photonics is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • design and development of efficient quantum dot light-emitting diode transmission layers
  • research on the performance degradation mechanism of quantum dot light-emitting diode devices
  • high-resolution quantum dot light-emitting diode techniques
  • novel quantum dot light-emitting materials
  • integration of quantum dots with micro-led/mini-led
  • highly efficient perovskite quantum dot light-emitting diodes
  • stabilized perovskite quantum dot light-emitting material manufacturing technology
  • quantum dot light-emitting diode application
  • quantum dot color conversion luminescent thin-film backlighting technologies
  • quantum dot patterning technologies

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Published Papers (2 papers)

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Research

16 pages, 3126 KiB  
Article
Waveguide Coupled Full-Color Quantum Dot Light-Emitting Diodes Modulated by Microcavities
by Yilan Zhang, Wenhao Wang, Fankai Zheng, Jiajun Zhu, Guanding Mei, Yuxuan Ye, Jieyu Tan, Hechun Zhang, Qiang Jing, Bin He, Kai Wang and Dan Wu
Photonics 2025, 12(5), 427; https://doi.org/10.3390/photonics12050427 - 29 Apr 2025
Viewed by 552
Abstract
Integrated light-emitting diodes (LEDs) with waveguides play an important role in applications such as augmented reality (AR) displays, particularly regarding coupling efficiency optimization. Quantum dot light-emitting diodes (QLEDs), an emerging high-performance optoelectronic device, demonstrate substantial potential for next-generation display technologies. This study investigates [...] Read more.
Integrated light-emitting diodes (LEDs) with waveguides play an important role in applications such as augmented reality (AR) displays, particularly regarding coupling efficiency optimization. Quantum dot light-emitting diodes (QLEDs), an emerging high-performance optoelectronic device, demonstrate substantial potential for next-generation display technologies. This study investigates the influence of microcavity modulation on the output of QLEDs coupled with a silicon nitride (SiNx) waveguide by simulating a white light QLED (W-QLED) with a broad spectrum and mixed RGB QDs (RGB-QLED) with a comparatively narrower spectrum. The microcavity converts both W-QLED and RGB-QLED emissions from broadband white-light emissions into narrowband single-wavelength outputs. Specifically, both of them have demonstrated wavelength tuning and full-width at half-maximum (FWHM) narrowing across the visible spectrum from 400 nm to 750 nm due to the microcavity modulation. The resulting RGB-QLED achieves a FWHM of 11.24 nm and reaches 110.76% of the National Television System Committee 1953 (NTSC 1953) standard color gamut, which is a 20.95% improvement over W-QLED. Meanwhile, due to the Purcell effect of the microcavity, the output efficiency of the QLED coupled with a SiNx waveguide is also significantly improved by optimizing the thickness of the Ag anode and introducing a tilted reflective mirror into the SiNx waveguide. Moreover, the optimal output efficiency of RGB-QLED with the tilted Ag mirror is 10.13%, representing a tenfold increase compared to the sample without the tilted Ag mirror. This design demonstrates an efficient and compact approach for the near-eye full-color display technology. Full article
(This article belongs to the Special Issue Quantum Dot Light-Emitting Diodes: Innovations and Applications)
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15 pages, 371 KiB  
Article
Circuit-QED for Multi-Loop Fluxonium-Type Qubits
by Larisa-Milena Pioraş-Ţimbolmaş, Levente Máthé and Liviu P. Zârbo
Photonics 2025, 12(5), 417; https://doi.org/10.3390/photonics12050417 - 25 Apr 2025
Viewed by 563
Abstract
Fluxonium qubits, designed to mitigate charge noise and enhance anharmonicity, are among the most promising superconducting platforms for quantum computing. To understand and exploit their quantum properties and design novel fluxonium-based architectures with improved functionalities, these systems require an accurate Hamiltonian formulation to [...] Read more.
Fluxonium qubits, designed to mitigate charge noise and enhance anharmonicity, are among the most promising superconducting platforms for quantum computing. To understand and exploit their quantum properties and design novel fluxonium-based architectures with improved functionalities, these systems require an accurate Hamiltonian formulation to capture their energy level structure and quantum dynamics. This work presents a systematic method for constructing the Hamiltonian for multi-loop circuits that partitions the system into a set of uncoupled harmonic oscillators and a coupled anharmonic part originating from the Josephson circuit elements, allowing clear identification of independent modes and isolating the nonlinearity in the Josephson terms. While demonstrated for fluxonium-type multi-loop circuits, this method can be generalized to other superconducting qubit architectures within the broader context of circuit QED, making it a versatile tool for exploring different circuit configurations. Our systematic and flexible modeling approach forms the theoretical basis for the qubit measurement and control experiments validating multi-loop fluxonium architectures. Full article
(This article belongs to the Special Issue Quantum Dot Light-Emitting Diodes: Innovations and Applications)
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