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Zhang X, Hu H, Qie Y, Lin L, Guo T, Li F. Boosting the Efficiency of High-Resolution Quantum Dot Light-Emitting Devices Based on Localized Surface Plasmon Resonance. ACS APPLIED MATERIALS & INTERFACES 2024. [PMID: 38416428 DOI: 10.1021/acsami.3c17786] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/29/2024]
Abstract
With pixel miniaturization, the performance of high-resolution quantum dot light-emitting diodes (QLEDs) usually degrades. Considering the dimension of ultrasmall pixels, herein, a barrier architecture based on localized surface plasmon resonance (LSPR) that promotes the radiative recombination of neighboring quantum dots is rationally designed to improve the device performance. Au nanoparticles (NPs) are embedded in an insulating polymer to form a honeycomb-patterned barrier layer via the nanoimprint process. Each pixel fabricated in the void area (average diameter of 1.5 μm) of the barrier layer is surrounded by a number of LSPR-NPs to enhance the luminescence. The resultant green QLEDs with a resolution of 9027 pixels per inch show a maximum external quantum efficiency of 11.1%, a 42.8% enhancement compared to the control device. Additionally, the lifetime of high-resolution QLEDs is obviously improved by the LSPR effect.
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Affiliation(s)
- Xu Zhang
- Institute of Optoelectronic Technology, Fuzhou University, Fuzhou 350116, P. R. China
| | - Hailong Hu
- Institute of Optoelectronic Technology, Fuzhou University, Fuzhou 350116, P. R. China
- Fujian Science and Technology Innovation Laboratory for Optoelectronic Information of China, Fuzhou 350108, P. R. China
| | - Yuan Qie
- Institute of Optoelectronic Technology, Fuzhou University, Fuzhou 350116, P. R. China
| | - Lihua Lin
- Institute of Optoelectronic Technology, Fuzhou University, Fuzhou 350116, P. R. China
- Fujian Science and Technology Innovation Laboratory for Optoelectronic Information of China, Fuzhou 350108, P. R. China
| | - Tailiang Guo
- Institute of Optoelectronic Technology, Fuzhou University, Fuzhou 350116, P. R. China
- Fujian Science and Technology Innovation Laboratory for Optoelectronic Information of China, Fuzhou 350108, P. R. China
| | - Fushan Li
- Institute of Optoelectronic Technology, Fuzhou University, Fuzhou 350116, P. R. China
- Fujian Science and Technology Innovation Laboratory for Optoelectronic Information of China, Fuzhou 350108, P. R. China
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Lee T, Lee M, Seo H, Kim M, Chun B, Kwak J. Top-Emitting Quantum Dot Light-Emitting Diodes: Theory, Optimization, and Application. SMALL METHODS 2024; 8:e2300266. [PMID: 37183298 DOI: 10.1002/smtd.202300266] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Revised: 04/10/2023] [Indexed: 05/16/2023]
Abstract
The superior optical properties of colloidal quantum dots (QDs) have garnered significant broad interest from academia and industry owing to their successful application in self-emitting QD-based light-emitting diodes (QLEDs). In particular, active research is being conducted on QLEDs with top-emission device architectures (TQLEDs) owing to their advantages such as easy integration with conventional backplanes, high color purity, and excellent light extraction. However, due to the complicated optical phenomena and their highly sensitive optoelectrical properties to experimental variations, TQLEDs cannot be optimized easily for practical use. This review summarizes previous studies that have investigated top-emitting device structures and discusses ways to advance the performance of TQLEDs. First, theories relevant to the optoelectrical properties of TQLEDs are introduced. Second, advancements in device optimization are presented, where the underlying theories for each are considered. Finally, multilateral strategies for TQLEDs to enable their wider application to advanced industries are discussed. This work believes that this review can provide valuable insights for realizing commercial TQLEDs applicable to a broad range of applications.
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Affiliation(s)
- Taesoo Lee
- Department of Electrical and Computer Engineering, Inter-university Semiconductor Research Center, and Soft Foundry Institute, Seoul National University, Seoul, 08826, Republic of Korea
| | - Minhyung Lee
- Department of Electrical and Computer Engineering, Inter-university Semiconductor Research Center, and Soft Foundry Institute, Seoul National University, Seoul, 08826, Republic of Korea
| | - Hansol Seo
- Department of Electrical and Computer Engineering, Inter-university Semiconductor Research Center, and Soft Foundry Institute, Seoul National University, Seoul, 08826, Republic of Korea
| | - Minjun Kim
- Department of Electrical and Computer Engineering, Inter-university Semiconductor Research Center, and Soft Foundry Institute, Seoul National University, Seoul, 08826, Republic of Korea
| | - Beomsoo Chun
- Department of Electrical and Computer Engineering, Inter-university Semiconductor Research Center, and Soft Foundry Institute, Seoul National University, Seoul, 08826, Republic of Korea
| | - Jeonghun Kwak
- Department of Electrical and Computer Engineering, Inter-university Semiconductor Research Center, and Soft Foundry Institute, Seoul National University, Seoul, 08826, Republic of Korea
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Carvalho WOF, Damasceno GHB, Moncada-Villa E, Mejía-Salazar JR. Active manipulation of radiated fields by a magnetoplasmonic half-wave dipole nanoantenna. OPTICS LETTERS 2023; 48:680-683. [PMID: 36723562 DOI: 10.1364/ol.480692] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/10/2022] [Accepted: 12/28/2022] [Indexed: 06/18/2023]
Abstract
We demonstrate a concept for the active manipulation of radiated fields by a magnetoplasmonic half-wave dipole nanoantenna. Our idea comprises a two arms nanoantenna, made of metallic ferromagnetic cobalt-silver alloy (Co6Ag94), inspired by the analogous radio frequency half-wave dipole antenna design. Numerical results, obtained under the magnetization saturation condition, indicate a tilting of the radiated beam depending on the magnitude and sense of the magnetization of the ferromagnetic material. Significantly, we obtained tilting angles as large as ±9.7∘ around the y axis for the magnetization placed along the x or z axes, respectively. Results in this work not only open up a new, to the best of our knowledge, way to dynamically manipulate the beam steering at the chip-scale, but also contribute to unveil novel magneto-optical effects at the nanoscale.
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Grimm P, Zeißner S, Rödel M, Wiegand S, Hammer S, Emmerling M, Schatz E, Kullock R, Pflaum J, Hecht B. Color-Switchable Subwavelength Organic Light-Emitting Antennas. NANO LETTERS 2022; 22:1032-1038. [PMID: 35001635 DOI: 10.1021/acs.nanolett.1c03994] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Future photonic devices require efficient, multifunctional, electrically driven light sources with directional emission properties and subwavelength dimensions. Electrically driven plasmonic nanoantennas have been demonstrated as enabling technology. Here, we present the concept of a nanoscale organic light-emitting antenna (OLEA) as a color- and directionality-switchable point source. The device consists of laterally arranged electrically contacted gold nanoantennas with their gap filled by the organic semiconductor zinc phthalocyanine (ZnPc). Since ZnPc shows preferred hole conduction in combination with gold, the recombination zone relocates depending on the polarity of the applied voltage and couples selectively to either of the two antennas. Thereby, the emission characteristics of the device also depend on polarity. Contrary to large-area OLEDs where recombination at metal contacts significantly contributes to losses, our ultracompact OLEA structures facilitate efficient radiation into the far-field rendering transparent electrodes obsolete. We envision OLEA structures to serve as wavelength-scale pixels with tunable color and directionality for advanced display applications.
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Affiliation(s)
- Philipp Grimm
- Nano-Optics and Biophotonics Group, Experimentelle Physik 5, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Stefan Zeißner
- Nano-Optics and Biophotonics Group, Experimentelle Physik 5, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Maximilian Rödel
- Experimentelle Physik 6, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Simon Wiegand
- Experimentelle Physik 6, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Sebastian Hammer
- Experimentelle Physik 6, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Monika Emmerling
- Nano-Optics and Biophotonics Group, Experimentelle Physik 5, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Enno Schatz
- Nano-Optics and Biophotonics Group, Experimentelle Physik 5, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - René Kullock
- Nano-Optics and Biophotonics Group, Experimentelle Physik 5, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Jens Pflaum
- Experimentelle Physik 6, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Bert Hecht
- Nano-Optics and Biophotonics Group, Experimentelle Physik 5, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
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