Results 51 to 60 of about 260,785 (166)

High Ambient Contrast Ratio and Efficiency LED Display Devices Utilizing Inverted Packaging Structure

open access: yesIEEE Photonics Journal
Highly light-absorbed encapsulation is generally used to eliminate the ambient light for light-emitting diode (LED) display devices, it is challenging to simultaneously achieve a high ambient contrast ratio (ACR) and high light output efficiency (LOE ...
Zong-Tao Li   +6 more
doaj   +1 more source

Copper ferrites@reduced graphene oxide anode materials for advanced lithium storage applications

open access: yesScientific Reports, 2017
Copper ferrites are emerging transition metal oxides that have potential applications in energy storage devices. However, it still lacks in-depth designing of copper ferrites based anode architectures with enhanced electroactivity for lithium-ion ...
Junyong Wang   +6 more
doaj   +1 more source

Fabricating waveguide Bragg gratings (WBGs) in bulk materials using ultrashort laser pulses

open access: yesNanophotonics, 2017
Optical waveguide Bragg gratings (WBGs) can be created in transparent materials using femtosecond laser pulses. The technique is conducted without the need for lithography, ion-beam fabrication methods, or clean room facilities.
Ams Martin   +3 more
doaj   +1 more source

Optical Bistability in Active Devices [PDF]

open access: yesOptical Bistability, 1988
Optical bistability in both FP and DFB type LDs is an interesting subject because they have optical gain. Optical gain results in advantages such as low switching optical power, high ON-OFF ratio, and large fan-out. Bistable LDs can also operate faster than one nanosecond.
openaire   +2 more sources

Internet of Things (IoT)-enabled framework for a sustainable Vaccine cold chain management system

open access: yesHeliyon
Vaccines are a unique category of drugs sensitive to temperature and humidity and whose effectiveness directly impacts public health. There has been an increase in vaccine-related adverse events worldwide, particularly in developing countries, attributed
Shaojun Jiang, Sumei Jia, Hongjun Guo
doaj   +1 more source

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