Results 81 to 90 of about 157,666 (280)

A Review of Light-Emitting Diodes and Ultraviolet Light-Emitting Diodes and Their Applications

Photonics
This paper presents an extensive literature review on Light-Emitting Diode (LED) fundamentals and discusses the historical development of LEDs, focusing on the material selection, design employed, and modifications used in increasing the light output. It
Trailokya Bhattarai, Abasifreke Ebong, Mohammad Yasin Akhtar Raja   +2 more
doaj   +1 more source

Degradation effect of Auger recombination and built-in polarization field on GaN-based light-emitting diodes

AIP Advances, 2018
In this work, theoretical investigation of the influence of Auger recombination coefficient and built-in polarization field on the internal quantum efficiency (IQE) in terms of lateral-vertical single quantum well (SQW) as well as multiquantum well (MQW)
Muhammad Usman, Kiran Saba, Dong-Pyo Han, Nazeer Muhammad, Shabieh Farwa, Rafique Muhammad, Tanzila Saba   +6 more
doaj   +1 more source

Photoconductivity‐Driven Quantum Efficiency Gain in Inorganic Ruddlesden‐Popper Layered Cs2PbBr2I2 Perovskite Photodetector for Visible Light Detection

Advanced Functional Materials, EarlyView.
Rational halogen mixing strategy was employed to shift the bandgap of Cs2PbBr2I2 from ultraviolet to visible region, enabling first realization of a visible‐light photodetector with this 2D layered Ruddlesden‐Popper perovskite material. Under illumination, light‐induced internal field forms and drives trap‐mediated persistent photoconductivity ...
Md Fahim Al Fattah, Asif Abdullah Khan, Saikiran Khamgaonkar, Majid Haji Bagheri, Danyah Khan, Md Rasidul Islam, Mahmoud Almadoun, Aixi Pan, Alexander Li, Marwa Abd‐Ellah, Vivek Maheshwari, Dayan Ban   +11 more
wiley   +1 more source

Building a Bidirectional Visible Light Communication Link: Challenges and Contributions [PDF]

, 2018
Visible Light Communication is a new information transmission method that involves sending data through light emitting diodes and photo-diodes via the visible light spectrum.
Harathi, Pranav
core   +1 more source

Silver Ion‐Mediated [hk1]‐Oriented Sb2Se3 Crystal Growth for Efficient Photoelectrochemical Hydrogen Evolution

Advanced Functional Materials, EarlyView.
Ag+‐mediated hydrothermal crystal engineering promotes preferential [hk1]‐oriented growth of Sb2Se3 via an ultrathin MoOx interlayer, improving crystallinity and suppressing non‐radiative recombination. The optimized Ag+ treatment photocathode delivers 24.7 mA cm−2 at 0 VRHE and improved stability, revealing an ion‐modulated route to high‐performance ...
Ziying Zhang, Zhenbin Wang, Mirjana Dimitrievska, Miloš Baljozović, Yongping Gan, Pardis Adams, Sanghyun Bae, Thomas Moehl, Wenzhe Niu, Xiang jiu Guan, S. David Tilley   +10 more
wiley   +1 more source

Carrier Dynamics in High-Efficiency Blue GaN Light-Emitting Diodes Under Different Bias Currents and Temperatures

IEEE Photonics Journal, 2012
Distinct temperature-dependent dynamic behaviors of GaN-based blue light-emitting diodes (LEDs) are observed by use of the very-fast electrical-optical pump-probe technique.
Kai-Lun Chi, Jin-Wei Shi, C. H. Jang, Pyry Kivisaari, Jani Oksanen, Jukka Tulkki, M. L. Lee, J. K. Sheu   +7 more
doaj   +1 more source

Multispectral mid-infrared light emitting diodes on a GaAs substrate [PDF]

, 2017
We have designed, simulated, and experimentally demonstrated four-colour mid-infrared (mid-IR) Light Emitting Diodes (LEDs) integrated monolithically into a vertical structure on a semi-insulating GaAs substrate.
Aziz, Mohsin, Cumming, David R.S., Khalid, Ata, Pusino, Vincenzo, Steer, Matthew, Thayne, Iain G., Xie, Chengzhi   +6 more
core   +1 more source

Infrared Nanocrystals for Space Application: Hardness to Irradiations

Advanced Functional Materials, EarlyView.
This article investigates infrared HgTe nanocrystals under X‐ray and ion irradiation, revealing remarkable radiation hardness. It uncovers distinct degradation mechanisms and shows that the nanomaterial outperforms integrated electronics. The results position colloidal nanocrystals as promising candidates for resilient space and harsh‐environment ...
Alexandre Neyret, Dario Mastrippolito, Bingbing Xia, Adrien Khalili, Maxime Lebreton, Giorgia Strobbia, Albin Colle, Marco Paye, Mariarosa Cavallo, Erwan Bossavit, Claire Abadie, Yoann Prado, Debora Pierucci, Victor Parahyba, Francois Coursaget, David Darson, Emrick Briand, Ian Vickridge, Stephane Demiguel, Sebastien Massenot, Jean‐Marc Belloir, Vincent Goiffon, Emmanuel Lhuillier   +22 more
wiley   +1 more source

Solar Simulator on the Basis of Powerful Light-Emitting Diodes

MATEC Web of Conferences, 2018
The Article describes the construction design and experimental results of the Solar Simulator, based on powerful LEDs with different radiation spectrum.
Aldoshina Oxana, Yugay Vyacheslav, Kaliaskarov Nurbol, Esenjolov Ulan, Nesipova Saltanat   +4 more
doaj   +1 more source

1.55 μm direct bandgap electroluminescence from strained n-Ge quantum wells grown on Si substrates [PDF]

, 2012
Electroluminescence from strained n-Ge quantum well light emitting diodes grown on a silicon substrate are demonstrated at room temperature. Electroluminescence characterisation demonstrates two peaks around 1.55 μm and 1.8 μm, which correspond to ...
Cecchi, S., Chrastina, D., Frigerio, J., Gallacher, Kevin, Isella, G., Paul, D., Velha, P.   +6 more
core   +1 more source