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Take apart your laptop screen, and at its heart you’ll find a plate patterned with pixels of red, green, and blue LEDs, arranged end to end like a meticulous Lite Brite display. When electrically powe...
铅卤钙钛矿材料由于其优异的光致和电致发光性能，如大的吸收系数、高的载流子迁移率和发光量子产率等，在太阳能电池、发光二极管等领域具有重要的应用前景。然而，铅的毒性及较差的物化及光稳定性限制了其实际应用。为了降低毒性及改善发光性能，无铅金属卤化物得到了广泛的研究，但他们通常在紫外区域有强的吸收，很难被商用蓝光芯片激发，从而限制了其在WLEDs的发光效率与应用。因此我们基于广西的丰富锰资源， 开展锰基钙...
Atomistic Calculations Predict That Boron Incorporation Increases The Efficiency Of Leds（图）
Atomistic Calculations Predict Boron Incorporation Increases Leds
2017/12/18
High-power white LEDs face the same problem that Michigan Stadium faces on game day — too many people in too small of a space. Of course, there are no people inside of an LED. But there are many elect...
Dual-function nanorod LEDs could make multifunctional displays
Dual-function nanorod LEDs multifunctional displays
2017/2/16
Cellphones and other devices could soon be controlled with touchless gestures and charge themselves using ambient light, thanks to new LED arrays that can both emit and detect light.Made of tiny nanor...
Dual-function nanorod LEDs could make multifunctional displays
Dual-function nanorod LEDs multifunctional displays
2017/3/13
Cellphones and other devices could soon be controlled with touchless gestures and charge themselves using ambient light, thanks to new LED arrays that can both emit and detect light.Made of tiny nanor...
New LEDs may offer better way to clean water in remote areas
New LEDs clean water remote areas
2016/11/29
For the first time, researchers have created light-emitting diodes (LEDs) on lightweight flexible metal foil.Engineers at The Ohio State University are developing the foil based LEDs for portable ultr...
Researchers from North Carolina State University have developed a new processing technique that makes light emitting diodes (LEDs) brighter and more resilient by coating the semiconductor material gal...
Scientists build thinnest-possible LEDs to be stronger, more energy efficient（图）
thinnest-possible led more energy efficient
2014/3/20
Most modern electronics, from flat-screen TVs and smartphones to wearable technologies and computer monitors, use tiny light-emitting diodes, or LEDs. These LEDs are based off of semiconductors that e...
Spectral spatial coherence of high-power multi-chip LEDs
Spectral spatial coherence high-power multi-chip LEDs
2013/7/3
We investigate the spatial coherence of the light generated from high-power multi-chip red LEDs by using the van Cittert-Zernike theorem. It is theoretically demonstrated that the light generated from...
Solar energy, organic LEDs are advanced in first articles published in new SPIE 'Journal of Photonics for Energy'（图）
SPIE Journal of Photonics for Energy light-emitting materials and devices
2011/4/22
Publication of the first articles in the new SPIE Journal of Photonics for Energy (JPE) began last month in the SPIE Digital Library. The new journal includes special sections on organic photovoltaics...
230 Mbit/s via a Wireless Visible-Light Link based on OOK Modulation of Phosphorescent White LEDs
Free-space optical communication Light-emitting diodes
2015/6/8
We report a first indoor wireless visible-light link operating up to 230 Mbit/s by use of on-off-keying and with bit-error-ratios below 2·10 -3 . The results were achieved for illuminance levels recom...
Effectiveness of composite resin polymerization using light-emitting diodes (LEDs) or halogen-based light-curing units
Composite resins Spectrophotometry
2009/10/20
The clinical performance of composite resins is greatly influenced by the quality of the light-curing unit used. The aim of this study was to compare the efficiency of a commercial light-emitting diod...
Effects of LEDs on Microhardness and Temperature Rise of Dental Composite Resins
LEDs Composite resins Microhardness
2009/9/14
The purpose of this study was to examine the effects of LEDs on the polymerization of dental composite resins. Three composite resins and two LED units were used to evaluate the latter's effects on mi...
A team of researchers in the US has developed a new technique to shrink the size of inorganic LEDs so they can be used as pixels in display screens. The novel process could allow these tiny light sour...
125 Mbit/s over 5 m Wireless Distance by Use of OOK-Modulated Phosphorescent White LEDs
Wireless Distance OOK-Modulated Phosphorescent White LEDs
2015/7/20
We report a wireless visible-light link operating for the first time at 125 Mbit/s over 5 m distance indoor by use of on-off-keying (OOK), resulting in bit-error-ratios below 2·10 -3 .