Research Progress of Photonic Crystal Light-Emitting Diode

Libai, 陈丽白 Chen; Zhenning, 郭震宁 Guo; Jieben, 林介本 Lin

doi:10.3788/lop20084504.0062

Cited by 2 publications

(2 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…When light deviates from the defect, the photonic localization effect quickly decays it. [49][50][51] Based on extension, crystal defects are point, line, or surface defects. As demonstrated in Figure 3A, inserting a substance with a different refractive index into the gap, replacing a hole with fabric, or missing a place may cause a point defect.…”

Section: Defective State Modulation Of Ledsmentioning

confidence: 99%

“…A photonic crystal with a defect creates a new electromagnetic wave pattern in the forbidden PBG and localizes photons with the defect state's frequency at the defect spot. When light deviates from the defect, the photonic localization effect quickly decays it 49–51 . Based on extension, crystal defects are point, line, or surface defects.…”

Section: Fundamental Principles For Photonic Crystal Ledsmentioning

confidence: 99%

See 1 more Smart Citation

Design of photonic crystals for light‐emitting diodes

Wang,

Dong,

et al. 2023

J Am Ceram Soc.

View full text Add to dashboard Cite

Photonic crystals (PC) can greatly enhance the optoelectronic performance of LEDs, due to their distinctive color and photonic band gap, etc. Therefore, many scholars have conducted extensive research based on the high light extraction efficiency, good monochromaticity, and other excellent optoelectronic properties of PC LEDs. This review discusses the main principles of photonic crystals to improve the optoelectronic performance of LEDs and summarizes 12 structural applications of photonic crystal LEDs, such as PC slabs, Bragg grating, Backside reflectors, Surface PC, Embedded PC, Dual PC, PC beads, CPC, PC thin films, LIPC, defective PC, composite architectures with other materials that boost LED optoelectronic qualities. In summary, it is found that photonic crystals can not only greatly improve the light extraction efficiency of LEDs but also improve other optoelectronic properties such as luminescent color, and directional radiation angle, and reduce the manufacturing cost of LEDs. Photonic crystal LEDs are expected to be a strong candidate for future lighting technology Finally, the prospects and challenges of PC LEDs are summarized.This article is protected by copyright. All rights reserved

show abstract

Section: Defective State Modulation Of Ledsmentioning

confidence: 99%

Section: Fundamental Principles For Photonic Crystal Ledsmentioning

confidence: 99%

Design of photonic crystals for light‐emitting diodes

Wang,

Dong,

et al. 2023

J Am Ceram Soc.

View full text Add to dashboard Cite

show abstract

Metamaterials for light extraction and shaping of micro-scale light-emitting diodes: from the perspective of one-dimensional and two-dimensional photonic crystals

Chen¹,

Zhao²,

Chen³

et al. 2023

Opt. Express

View full text Add to dashboard Cite

Metamaterials have attracted broad attention owing to their unique versatile micro- and nano-structures. As a kind of typical metamaterial, photonic crystals (PhCs) are capable of controlling light propagation and constraining spatial light distribution from the chip level. However, introducing metamaterial into micro-scale light-emitting diodes (µLED) still exists many unknowns to explore. This paper, from the perspective of one-dimensional and two-dimensional PhCs, studies the influence of metamaterials on the light extraction and shaping of µLEDs. The µLEDs with six different kinds of PhCs and the sidewall treatment are analyzed based on finite difference time domain (FDTD) method, in which the optimal match between the PhCs type and the sidewall profile is recommended respectively. The simulation results show that the light extraction efficiency (LEE) of the µLEDs with 1D PhCs increases to 85.3% after optimizing the PhCs, and is further improved to reach 99.8% by the sidewall treatment, which is the highest design record so far. It is also found that the 2D air ring PhCs, as a kind of left-handed metamaterials, can highly concentrate the light distribution into 30° with the LEE of 65.4%, without help of any light shaping device. The surprising light extraction and shaping capability of metamaterials provides a new direction and strategy for the future design and application of µLED devices.

show abstract

Research Progress of Photonic Crystal Light-Emitting Diode

Cited by 2 publications

References 0 publications

Design of photonic crystals for light‐emitting diodes

Design of photonic crystals for light‐emitting diodes

Metamaterials for light extraction and shaping of micro-scale light-emitting diodes: from the perspective of one-dimensional and two-dimensional photonic crystals

Contact Info

Product

Resources

About