Results 21 to 30 of about 295,338 (287)
Molecules, 2021 The far ultraviolet C (UVC) light sources based on carbon nanotube (CNT) field emitters as excitation sources have become promising light sources for sterilization, disinfection, and water purification. However, the low light extraction efficiency of UVC–
Manoj Kumar Chandra Mohan +5 more
doaj +1 more source
High extraction efficiency phosphor design applied in laser lighting
Optics Express, 2023 Laser lighting has great potential to be the next generation of general lighting due to its high brightness and directionality. However, the light extraction efficiency and luminous efficiency from the light exit surface are greatly limited since phosphor structure.
Meng, Yan, Mali, Gong, Jianshe, Ma
openaire +2 more sources
Overcoming the Fundamental Limitation in Light-Extraction Efficiency of Deep-Ultraviolet Light-Emitting Diodes by Utilizing Transverse-Magnetic-Dominant Emission [PDF]
, 2019 While the demand for deep ultraviolet (DUV) light sources is rapidly growing, the efficiency of current AlGaN-based DUV light-emitting diodes (LEDs) remains very low due to their fundamentally limited light-extraction efficiency (LEE), calling for a ...
E. Fred Schubert +8 more
core +2 more sources
IEEE Photonics Journal, 2020 Fabricating the nanowire ultraviolet light emitting diodes (UV LEDs) has been a promising candidate to dramatically enhance the external quantum efficiency (EQE) of UV LEDs.
Zichen Zhang, Fangliang Gao, Guoqiang Li
doaj +1 more source
IEEE Photonics Journal, 2017 An inclined sidewall scattering structure with air cavity characterized by a metal bottom and flat parallel top (Bottom_metal) is proposed to enhance the light extraction efficiency (LEE) for AlGaN-based deep ultraviolet light-emitting diodes (DUV LEDs).
Yonghui Zhang +6 more
doaj +1 more source
IEEE Photonics Journal, 2018 In this work, we investigate the effect of sidewall angle, height and space of an air cavity extractor (AC-Extractor) on the polarization-dependent light extraction efficiency (LEE) for AlGaN-based deep-ultraviolet light-emitting diodes (DUV LEDs) using ...
Yonghui Zhang +8 more
doaj +1 more source
Results in Physics, 2018 In this work, the light extraction efficiency enhancement of GaN-based thin-film flip-chip (TFFC) light-emitting diodes (LEDs) with high-refractive-index (TiO2) buckling nanostructures was studied using the three-dimensional finite difference time domain
Qing-Yang Yue +3 more
doaj +1 more source
Research Progress of AlGaN-Based Deep Ultraviolet Light-Emitting Diodes
Micromachines, 2023 AlGaN-based deep ultraviolet light-emitting diodes (DUV LEDs) have great application prospects in sterilization, UV phototherapy, biological monitoring and other aspects.
Ruiqiang Xu +4 more
doaj +1 more source
Crystals, 2019 In this study, we present a novel type of package, freeform-designed chip scale package (FDCSP), which has ultra-high light extraction efficiency and bat-wing light field.
Che-Hsuan Huang +9 more
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Photonics, 2018 Recently developed graded photonic super-crystals show an enhanced light absorption and light extraction efficiency if they are integrated with a solar cell and an organic light emitting device, respectively.
Safaa Hassan +4 more
doaj +1 more source