نتایج جستجو برای: uv leds
تعداد نتایج: 74565 فیلتر نتایج به سال:
In the current COVID-19 scenario, there is an urgent need for developing efficient and mercury-free deep-ultraviolet (deep-UV) light sources disinfection applications. AlGaN-based light-emitting diodes (LEDs) may be considered as alternative, but due to their inherent low efficiencies in deep-UV spectral region, significant developments are required address efficiency issues. Here, a chip-size ...
The growth of non-polar AlGaN digital alloy (DA) is achieved by metal-organic vapor phase epitaxy using GaN microwire m-facets as the template. This DA consisting five periods two monolayer-thick layers and (approximately 50% Al-content) integrated into middle an n-p GaN/AlGaN junction to design core-shell wire-μLED. optical emission active zone investigated 5 K cathodoluminescence consistent w...
Comparison of optical power, external quantum efficiency in InGaN / GaN UV LEDs at room temperature and liquid nitrogen is carried out. The spectral densities the current low-frequency noise have been investigated. mechanisms carrier transport, formation noise, dependences rates radiative nonradiative recombination temperatures are considered.
The flip chip ultraviolet light-emitting diodes (FC UV-LEDs) with a wavelength of 365 nm are developed with the ex situ reactive plasma deposited (RPD) AlN nucleation layer on patterned sapphire substrate (PSS) by an atmospheric pressure metal-organic chemical vapor deposition (AP MOCVD). The ex situ RPD AlN nucleation layer can significantly reduce dislocation density and thus improve the crys...
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