Results 71 to 80 of about 9,488 (354)

Safe and Truly Ecofriendly LED Lighting

Energy Science & Engineering
Truly ecofriendly and safe light‐emitting diode (LED) lighting in the built and urban environments requires the use of LED lights emitting significantly lower amount of blue light than conventional, first‐generation white LED lights.
Mario Pagliaro
doaj   +1 more source

Synergetic Effect between Lighting Efficiency Enhancement and Building Energy Reduction Using Alternative Thermal Operating System of Indoor LED Lighting

Energies, 2015
We investigated the synergetic effect between light-emitting diode (LED) lighting efficiency and building energy savings in heating and cooling using an alternative thermal operating system (ATOS) of indoor LED lighting integrated with the ventilation ...
Byung-Lip Ahn, Ji-Woo Park, Seunghwan Yoo, Jonghun Kim, Hakgeun Jeong, Seung-Bok Leigh, Cheol-Yong Jang   +6 more
doaj   +1 more source

Orbital Geometry‐Governed Response of Pressure‐Tunable Quantum Defects in hBN

Advanced Functional Materials, EarlyView.
Defects in hBN act as ultrasensitive quantum manometers when the energy of the intradefect optical transitions is modified by lattice compression. The orbital geometry of the electron wave functions governs how electron hopping and Coulomb interactions react uniquely to the reduction of the van der Waals gap and in‐plane compression, leading to robust ...
Magdalena Grzeszczyk, Danis I. Badrtdinov, Kenji Watanabe, Takashi Taniguchi, Cyrus E. Dreyer, Malte Rösner, Maciej Koperski   +6 more
wiley   +1 more source

Light-emitting diodes and their applications in energy-saving lighting

, 2011
New light-emitting diode technology offers significant promise for reducing energy usage in lighting and display applications. This paper introduces light-emitting diodes, sets their performance in context and predicts how an ultimate reduction of up to
Michelle A. Moram
core   +1 more source

Glass network engineering of yellow-emitting Ba2Sc2B4O11:Ce3+ glass ceramics for full-spectrum lighting

Journal of Advanced Ceramics
Currently, a full-spectrum illumination scheme based on violet-light excitation is proposed to achieve high-quality and healthy lighting. Unfortunately, the most important yellow phosphors are extremely scarce owing to the low absorption efficiency of ...
Shuangyin Zhu, Shilin Jin, Longkun Zhan, Qin Xu, Ziyi Hu, Jinfeng Qiu, Jiamin Chen, Tao Pang, Lingwei Zeng, Xinyue Li, Daqin Chen   +10 more
doaj   +1 more source

Low‐Dimensional Phase Distribution of Quasi‐2D Perovskites Induced by Interfacial Effect Enables Efficient Blue Lighting‐Emitting Diodes [PDF]

, 2023
Linlin Xu, Zhixian Wu, Chunli Jiang, Mengqin Liu, Bo Li, Hechun Lin, Weimin Liu, Hui Peng, Chunhua Luo   +8 more
openalex   +1 more source

Exciton Binding Energy of Phosphorescent Emitter Molecules in Organic Light‐Emitting Diodes

Advanced Functional Materials, EarlyView.
Energy level alignment is key to efficient OLED design, yet determining LUMO energies remains challenging. A methodology based on field‐induced dissociation and kinetic Monte Carlo simulations is presented to extract LUMO energies of iridium‐based phosphorescent emitters from their exciton binding energy.
Hiroki Tomita, Lucas R. L. Norg, Patrick Diederen, Clint van Hoesel, Christ H. L. Weijtens, Peter A. Bobbert, Reinder Coehoorn   +6 more
wiley   +1 more source

Ultrasensitive Anti‐Stokes Luminescence Thermometry in Transition Metal Dichalcogenide Monolayers

Advanced Functional Materials, EarlyView.
We demonstrate a highly sensitive nanothermometer using anti‐Stokes photoluminescence, also known as photoluminescence upconversion (UPL), in monolayer tungsten disulfide. A strong resonantly enhanced UPL is observed, confirming the central role of optical phonons in the PL upconversion mechanism.
Sharada Nagarkar, Fahrettin Sarcan, Elanur Hut, Emiliano R. Martins, Stuart A. Cavill, Thomas F. Krauss, Yue Wang   +6 more
wiley   +1 more source

Enhancing the photoluminescence quantum yields of blue-emitting cationic iridium(III) complexes bearing bisphosphine ligands

, 2016
EZ-C acknowledges the University of St Andrews for financial support. We thank Johnson Matthey and Umicore AG for the gift of materials and Cihang Yu for the preparation of isopropxantphos. We thank Dr. Nail Shaveleev for the synthesis of NMS25. IDWS and
Henwood, Adam Francis, Slawin, Alexandra Martha Zoya, Di Mascio, Vincent, Kamer, Paul C J, Samuel, Ifor David William, Bansal, Ashu Kumar, Martínez-Sarti, Laura, Pertegás, Antonio, Bolink, Henk J., Zysman-Colman, Eli, Cordes, David Bradford, Rota Martir, Diego   +11 more
core   +1 more source

Demonstration Assessment of Light-Emitting Diode (LED) Post-Top Lighting at Central Park in New York City [PDF]

, 2012
A review of five post-top light-emitting diode (LED) pedestrian luminaires installed in New York City's Central Park for possible replacement to the existing metal halide post-top luminaire.
Myer, Michael, Kinzey, Bruce R., Goettel, Russell T.   +2 more
core   +1 more source