Enhanced Color Conversion of Quantum Dots Located in the Hot Spot of Surface Plasmon Coupling

Yang, Shaobo; Lai, Yi-Chen; Feng, HIS-YU; Lee, Yueh-Chi; Li, Zong-Han; Wu, Shung-Hsiang; Lin, Yu‐Sheng; Hsieh, Hung-Jen; Chu, Chun-Jui; Chen, Wei-Cheng; Kuo, Yao‐Haur; Yang, C. C.

doi:10.1109/lpt.2023.3237779

Cited by 6 publications

(7 citation statements)

References 8 publications

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“…The structure of a closed spherical nano-cavity with radiating dipoles inside used for the theoretical/numerical studies above may be impractical for experimental implementation. However, a closed nano-cavity can be implemented with a surface nano-hole lled with a photoresist solution of colloidal QDs and covered by a deposited metal or dielectric over-layer after the photoresist is solidi ed [15,22]. Although it is reasonable to use a two-level system for describing the electron transition and radiation behaviors of a colloidal QD in evaluating the feedback or Purcell effect, the resultant saturation effect can be overestimated.…”

Section: Discussionmentioning

confidence: 99%

Theoretical/Numerical Studies of the Nanoscale-cavity Effects on Dipole Emission, Förster Resonance Energy Transfer and Surface Plasmon Coupling

Kuo

Yang

2023

Preprint

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The electric field and radiated power of a radiating dipole located inside a spherical nano-cavity are formulated to show that the nano-cavity structure or nanoscale-cavity effect can enhance the near-field intensity inside the cavity and the far-field radiated power of the dipole. Such enhancements are caused by two contributing factors, including the classical electromagnetic scattering as formulated and the Purcell effect, which is implemented through a numerical feedback process by assuming a two-level system for the radiating dipole. The enhancement of near-field intensity results in the efficiency increase of Förster resonance energy transfer when both energy donor and acceptor are located inside the nano-cavity. By combining the enhancements of the field intensity of the donor and the radiated power of the acceptor, the color conversion efficiency can be increased through the nanoscale-cavity effect. We also numerically demonstrate that the nanoscale-cavity effect can enhance surface plasmon coupling for increasing the radiated power of a dipole located nearby an Ag nanoparticle inside a nano-cavity.

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Section: Discussionmentioning

confidence: 99%

Theoretical/Numerical Studies of the Nanoscale-cavity Effects on Dipole Emission, Förster Resonance Energy Transfer and Surface Plasmon Coupling

Kuo

Yang

2023

Preprint

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“…Yang's research group designed tw structures and characterized them using PL. The first structure, as shown in Figure 13a involves nanoholes etched to a depth not exceeding the thickness of the P-GaN layer, fille with red and green QDs and covered with a layer of Ag serving as LSP [92]. PL testin (shown in Figure 13b) indicates that both red and green PL intensities are enhanced b the SP coupling, clearly demonstrating the enhanced color conversion from QWs to QD Furthermore, the research group etched nanoholes into the N-GaN layer and filled them with QDs and Ag (shown in Figure 13c) [93], allowing for closer contact and couplin between QWs, QDs, and LSPs.…”

Section: Using Nanoholes To Enhance Color Conversion Efficiencymentioning

confidence: 99%

“…( b ) EL spectra. Both QDs and Ag NPs are simultaneously filled into the nanoholes [ 92 ]. ( c ) Schematic diagram.…”

Section: Figurementioning

confidence: 99%

Advancements in Micro-LED Performance through Nanomaterials and Nanostructures: A Review

Fang,

Du,

Guo

et al. 2024

Nanomaterials

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Micro-light-emitting diodes (μLEDs), with their advantages of high response speed, long lifespan, high brightness, and reliability, are widely regarded as the core of next-generation display technology. However, due to issues such as high manufacturing costs and low external quantum efficiency (EQE), μLEDs have not yet been truly commercialized. Additionally, the color conversion efficiency (CCE) of quantum dot (QD)-μLEDs is also a major obstacle to its practical application in the display industry. In this review, we systematically summarize the recent applications of nanomaterials and nanostructures in μLEDs and discuss the practical effects of these methods on enhancing the luminous efficiency of μLEDs and the color conversion efficiency of QD-μLEDs. Finally, the challenges and future prospects for the commercialization of μLEDs are proposed.

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“…Such an energy transfer is effective when the absorption spectrum of the acceptor overlaps the emission wavelength of the donor and the distance between the donor and acceptor is shorter than several tens nm [16][17][18][19][20][21]. FRET is a useful mechanism for color conversion, particularly when the energy donor and acceptor are placed inside or near a nanoscale cavity and hence their distance is small [7,8,16,22]. The SP coupling between a light emitter and an SP resonance mode of a metal nanostructure can be understood as the process of energy transfer from the light emitter into the SP resonance mode for radiation before the energy is consumed by the non-radiative process of the light emitter.…”

Section: Introductionmentioning

confidence: 99%

Theoretical/Numerical Studies of the Nanoscale-Cavity Effects on Dipole Emission, Förster Resonance Energy Transfer, and Surface Plasmon Coupling

Kuo

Yang

2023

Plasmonics

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The electric eld and radiated power of a radiating dipole located inside a spherical nano-cavity are formulated to show that the nano-cavity structure or nanoscale-cavity effect can enhance the near-eld intensity inside the cavity and the far-eld radiated power of the dipole. Such enhancements are caused by two contributing factors, including the classical electromagnetic scattering as formulated and the Purcell effect, which is implemented through a numerical feedback process by assuming a two-level system for the radiating dipole. The enhancement of near-eld intensity results in the e ciency increase of Förster resonance energy transfer when both energy donor and acceptor are located inside the nanocavity. By combining the enhancements of the eld intensity of the donor and the radiated power of the acceptor, the color conversion e ciency can be increased through the nanoscale-cavity effect. We also numerically demonstrate that the nanoscale-cavity effect can enhance surface plasmon coupling for increasing the radiated power of a dipole located nearby an Ag nanoparticle inside a nano-cavity.

show abstract

Enhanced Color Conversion of Quantum Dots Located in the Hot Spot of Surface Plasmon Coupling

Cited by 6 publications

References 8 publications

Theoretical/Numerical Studies of the Nanoscale-cavity Effects on Dipole Emission, Förster Resonance Energy Transfer and Surface Plasmon Coupling

Theoretical/Numerical Studies of the Nanoscale-cavity Effects on Dipole Emission, Förster Resonance Energy Transfer and Surface Plasmon Coupling

Advancements in Micro-LED Performance through Nanomaterials and Nanostructures: A Review

Theoretical/Numerical Studies of the Nanoscale-Cavity Effects on Dipole Emission, Förster Resonance Energy Transfer, and Surface Plasmon Coupling

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