Specification for harmonized system of quality assessment for electronic components. Blank detail specification: light emitting diodes, light emitting diode arrays

AbstractAlthough significant progress has been made in the development of light-emitting materials for organic light-emitting diodes along with the elucidation of emission mechanisms, the electron injection/transport mechanism remains unclear, and the materials used for electron injection/transport have been basically unchanged for more than 20 years. Here, we unravelled the electron injection/transport mechanism by tuning the work function near the cathode to about 2.0 eV using a superbase. This extremely low-work function cathode allows direct electron injection into various materials, and it was found that organic materials can transport electrons independently of their molecular structure. On the basis of these findings, we have realised a simply structured blue organic light-emitting diode with an operational lifetime of more than 1,000,000 hours. Unravelling the electron injection/transport mechanism, as reported in this paper, not only greatly increases the choice of materials to be used for devices, but also allows simple device structures.

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Electrically driven single microribbon based near-infrared exciton-polariton light-emitting diode

CrystEngComm ◽

10.1039/d1ce00419k ◽

2021 ◽

Author(s):

Mingming Jiang ◽

Fupeng Zhang ◽

Kai Tang ◽

Peng Wan ◽

Caixia Kan

Keyword(s):

High Performance ◽

Near Infrared ◽

Light Emitting Diodes ◽

Light Emitting Diode ◽

Light Sources ◽

Coherent Light ◽

Light Emitting ◽

Exciton Polaritons ◽

Laser Devices

Achieving electrically-driven exciton-polaritons has drawn substantial attention toward developing ultralow-threshold coherent light sources, containing polariton laser devices and high-performance light-emitting diodes (LEDs). In this work, we demonstrate an electrically driven...

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The Optical Properties of InGaN/GaN Nanorods Fabricated on (-201) β-Ga2O3 Substrate for Vertical Light Emitting Diodes

Photonics ◽

10.3390/photonics8020042 ◽

2021 ◽

Vol 8 (2) ◽

pp. 42

Author(s):

Jie Zhao ◽

Weijiang Li ◽

Lulu Wang ◽

Xuecheng Wei ◽

Junxi Wang ◽

...

Keyword(s):

Stark Effect ◽

Light Emitting Diodes ◽

Light Emitting Diode ◽

Strain Relaxation ◽

Blue Shift ◽

Peak Position ◽

Excitation Power ◽

Light Extraction Efficiency ◽

Excitation Power Density ◽

Light Emitting

We fabricated InGaN/GaN nanorod light emitting diode (LED) on (-201) β-Ga2O3 substrate via the SiO2 nanosphere lithography and dry-etching techniques. The InGaN/GaN nanorod LED grown on β-Ga2O3 can effectively suppress quantum confined Stark effect (QCSE) compared to planar LED on account of the strain relaxation. With the enhancement of excitation power density, the photoluminescence (PL) peak shows a large blue-shift for the planar LED, while for the nanorod LED, the peak position shift is small. Furthermore, the simulations also show that the light extraction efficiency (LEE) of the nanorod LED is approximately seven times as high as that of the planar LED. Obviously, the InGaN/GaN/β-Ga2O3 nanorod LED is conducive to improving the optical performance relative to planar LED, and the present work may lay the groundwork for future development of the GaN-based vertical light emitting diodes (VLEDs) on β-Ga2O3 substrate.

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LIFI COMMUNICATION SYSTEM USING KEYPAD

International journal of multidisciplinary advanced scientific research and innovation ◽

10.53633/ijmasri.2021.2.1.002 ◽

2022 ◽

Vol 2 (1) ◽

pp. 394-396

Author(s):

Sapna Gupta ◽

Gursharan Kaur ◽

Ridima Mittal ◽

Dev Garg

Keyword(s):

Optical Communication ◽

Data Transmission ◽

Communication System ◽

Light Emitting Diode ◽

Transmission System ◽

Electronic Components ◽

Light Emitting ◽

Data Transmission System ◽

Wireless Fidelity

Over the years, the overdependence on Wireless Fidelity (Wi-Fi) for data transmission necessitated the need for an alternate and more reliable means of communication, hence, Light Fidelity (Li-Fi). It involves the use of Light Emitting Diode to transmit data by blinking (i.e. switching them on and off) at a speed not noticeable to the eye. This paper proposed the development of the Li-Fi system using off the shelf electronic components. This would make the system an indispensable means of communication in the nearest future. This data transmission system is different from those in existence because expensive components were not in the design, invariably reducing the overall cost of the implementation. Keywords: Light Fidelity (Li-Fi), Wireless Fidelity (Wi-Fi) Optical communication, Telecommunication

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All-solution processed inverted green quantum dot light-emitting diodes with concurrent high efficiency and long lifetime

Materials Horizons ◽

10.1039/c9mh01053j ◽

2019 ◽

Vol 6 (10) ◽

pp. 2009-2015 ◽

Cited By ~ 13

Author(s):

Zhiwen Yang ◽

Qianqian Wu ◽

Gongli Lin ◽

Xiaochuan Zhou ◽

Weijie Wu ◽

...

Keyword(s):

Quantum Dots ◽

Quantum Dot ◽

High Efficiency ◽

Light Emitting Diodes ◽

Light Emitting Diode ◽

Shell Growth ◽

Solution Processed ◽

Light Emitting ◽

Long Lifetime

An all-solution processed inverted green quantum dot-based light-emitting diode with concurrent high efficiency and long lifetime is obtained by precisely controlled double shell growth of quantum dots.

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