Enhanced light output from light emitting diodes with two-dimensional cone-shape nanostructured surface

Wang, Benzhong; Chua, Soo-Jin

doi:10.1116/1.4804406

Cited by 6 publications

(4 citation statements)

References 25 publications

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“…However, constrained by the LED's own structure, these nanomaterials may not fully exert their maximum potential. Therefore, combining Numerous research results indicate that nanomaterials such as Ag NPs, polystyrene, metal oxide NPs, and others have a positive impact on enhancing the light-emitting performance of LEDs [68][69][70][71]. However, constrained by the LED's own structure, these nanomaterials may not fully exert their maximum potential.…”

Section: Tio2 Nanoparticlesmentioning

confidence: 99%

“…Numerous research results indicate that nanomaterials such as Ag NPs, polystyrene, metal oxide NPs, and others have a positive impact on enhancing the light-emitting performance of LEDs [ 68 , 69 , 70 , 71 ]. However, constrained by the LED’s own structure, these nanomaterials may not fully exert their maximum potential.…”

Section: Using Nanomaterials To Enhance μLed Luminous Efficiency and ...mentioning

confidence: 99%

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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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Section: Tio2 Nanoparticlesmentioning

confidence: 99%

Section: Using Nanomaterials To Enhance μLed Luminous Efficiency and ...mentioning

confidence: 99%

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

Fang,

Du,

Guo

et al. 2024

Nanomaterials

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“…To increase the light extraction efficiency (LEE) of red LEDs, spin-coated polystyrene (PS) nanosphere arrays atop AlGaInP-based μLED surfaces have recently been proposed. − Figure depicts p-side-up red AlGaInP-based μLEDs with hollow hemispheric PS (HHPS) arrays . The structural schematic of the p-side-up AlGaInP-based μLED with a HHPS array is shown in Figure a.…”

Section: Monochromatic μLedsmentioning

confidence: 99%

Technology and Applications of Micro-LEDs: Their Characteristics, Fabrication, Advancement, and Challenges

Lee

Chen

et al. 2022

ACS Photonics

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Micro-light-emitting diodes (μLEDs) are getting much attention in display industry because of their outstanding optical and electrical characteristics. μLEDs have several advantages over liquid crystal displays (LCDs) and organic lightemitting diodes (OLEDs). μLEDs are showing long lifetimes, high reliability, high power efficiencies, high brightness, and fast response times with tiny pixels. However, for commercial usage, the high production cost and low external quantum efficiency (EQE) are the major hurdles. In this review, we briefly discuss the breakthroughs in μLED technology, fabrication methods, optical/ electrical characteristics, and challenges for display applications. In addition, the development of monolithic μLEDs and general device characteristics combined with various quantum dot patterning processes are systematically discussed. Potential solutions to address these challenges are also presented case by case.

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“…19,20 Nanosphere lithography (NSL) technique, which is based on a monolayer-colloidal-crystal (MCC) templating strategy, has been employed as an economic way to construct largearea and highly ordered nanostructures, 21,22 which have demonstrated important applications in the optoelectronic devices. [23][24][25][26] Recently, NSL has been utilized to prepare NPSS with the advantage of large-area fabrication and flexible tuning of the feature size. [27][28][29][30][31] The fabrication of NPSS involves pattern defining and pattern transferring to the sapphire substrate.…”

Section: Introductionmentioning

confidence: 99%

Improved performance of GaN-based light emitting diodes with nanopatterned sapphire substrates fabricated by wet chemical etching

Yan

Dong

Shan

et al. 2015

Journal of Vacuum Science &Amp; Technology B, Nanotechnology and Microelectronics: Materials, Processing, Measurement, and Phen

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The authors present a facile approach to the fabrication of nanopatterned sapphire substrates (NPSS) with concave pyramid structure by a wet etching method. The silica wet-etching mask on the sapphire substrate was prepared by using a colloidal monolayer templating strategy. NPSS with two different periods were prepared by employing 660 and 900 nm polystyrene colloidal spheres. Light emitting diode (LED) structure was epitaxially grown on the NPSS by the metal-organic chemical vapor deposition method. Both structural and optoelectronic properties of LEDs grown on flat sapphire substrate and NPSS were demonstrated and compared in detail. The calculations based on x-ray rocking curves revealed that the threading dislocation densities (TDDs) were decreased and the crystalline quality of epitaxial GaN film was improved when NPSS was used. Furthermore, the decrease in the edge TDDs was more prominent than that in the screw TDDs, which could be explained by the dislocation annihilation mechanism. The LEDs grown on 660- and 900-nm-NPSS exhibited 48% and 56% enhancement in light output power compared to that of a conventional LED on a flat sapphire substrate, arising from the nanoscale patterns in the sapphire which allowed more light to reflect from sapphire substrate onto the top direction.

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Enhanced light output from light emitting diodes with two-dimensional cone-shape nanostructured surface

Cited by 6 publications

References 25 publications

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

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

Technology and Applications of Micro-LEDs: Their Characteristics, Fabrication, Advancement, and Challenges

Improved performance of GaN-based light emitting diodes with nanopatterned sapphire substrates fabricated by wet chemical etching

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