Results 11 to 20 of about 1,228,728 (251)
Nanomaterials, 2022 Constant advance in improving the luminous efficacy (ηL) of nitride-based light-emitting diodes (LEDs) plays a critical role for saving measurable amounts of energy.
Shuo Zhang +12 more
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Nanoscale Research Letters, 2019 This paper proposes a new encapsulation structure for aluminum nitride-based deep UV light-emitting diodes (DUV-LEDs) and eutectic flip chips containing polydimethylsiloxane (PDMS) fluid doped with SiO2 nanoparticles (NPs) with a UV-transparent quartz ...
Zhi Ting Ye +5 more
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Improved Light Output Power of Chemically Transferred InGaN/GaN Light‐Emitting Diodes for Flexible Optoelectronic Applications [PDF]
Journal of Nanomaterials, 2015 Recent needs of semiconductor lighting sources have pursued diverse functionalities such as flexibility and transparency under high quantum efficiency. Inorganic/organic hybrid light‐emitting diodes (LEDs) are one way to meet these requirements. Here, we report on flexible III‐nitride‐based LEDs and the improvement of their electrical and optical ...
Ho-Jun Lee +6 more
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IEEE Photonics Journal, 2013 A 3-D numerical model has been developed to investigate the transient thermal, electrical, and optical output performance of a single-chip light-emitting diode (LED) with an interdigitated mesa geometry under dc operation and a multimicrochip LED under ...
Farn-Shiun Hwu +5 more
doaj +1 more source
A Review on the Progress of AlGaN Tunnel Homojunction Deep-Ultraviolet Light-Emitting Diodes
Crystals, 2023 Conventional deep-ultraviolet (UV) light-emitting diodes (LEDs) based on AlGaN crystals have extremely low light-emission efficiencies due to the absorption in p-type GaN anode contacts.
Kengo Nagata +11 more
doaj +1 more source
Optical power model of a laser bar diode [PDF]
, 2018 This article proposes a modelling method for laser diodes optical output power including its dependency on temperature. The device used for this study is a 40 W Monocrom's diode, with 808 nm wavelength emitted light and with a 19 emitters CS mount laser ...
Borràs Cristòfol, Ramon +3 more
core +1 more source
Monolithically Integrated Light Feedback Control Circuit for Blue/UV LED Smart Package
IEEE Photonics Journal, 2017 Given the performance decay of high-power light-emitting diode (LED) chips over time and package condition changes, having a reliable output light for sensitive applications is a point of concern.
Zahra Kolahdouz Esfahani +4 more
doaj +1 more source
Mechanism of enhanced light output in InGaN-based microlight emitting diodes [PDF]
, 2003 Micro-light emitting diode (LED) arrays with diameters of 4 to 20 mum have been fabricated and were found to be much more efficient light emitters compared to their broad-area counterparts, with up to five times enhancement in optical power densities ...
Choi, H. W. +5 more
core +1 more source
Enhanced light output power of thin film GaN-based high voltage light-emitting diodes
Optics Express, 2014 The characteristics of high-voltage light-emitting diodes (HVLEDs) consisting of a 64-cell LED array were investigated by employing various LED structures. Two types of HVLED were examined: a standard HVLED with a single roughened indium tin oxide (ITO) surface grown on a sapphire substrate and a thin-film HVLED (TF-HVLED) with a roughened n-GaN and ...
Ching-Ho, Tien +3 more
openaire +2 more sources
Pulse-shape discrimination between electron and nuclear recoils in a NaI(Tl) crystal [PDF]
, 2015 We report on the response of a high light-output NaI(Tl) crystal to nuclear recoils induced by neutrons from an Am-Be source and compare the results with the response to electron recoils produced by Compton scattered 662 keV $\gamma$-rays from a $^{137 ...
Adhikari, G. +26 more
core +2 more sources