نتایج جستجو برای: uv led
تعداد نتایج: 280537 فیلتر نتایج به سال:
We report the degradation study on AlGaN-based 265 nm ultraviolet light-emitting diodes (UV-LEDs) under a series of constant current stress. The failure mechanisms were investigated systematically by measuring optical and electrical characteristics LEDs before after aging. variation carrier concentration in active region was analyzed capacitance–voltage. Combining extracted apparent charge dist...
Colour harmony plays an important role in fine arts, architecture and design. But it can be also important to describe the quality of light sources: the distortion of perceived colour harmony of a set of colour samples under a light source can be a relevant factor by ranking the perceived colour quality of different light sources. In an earlier experimental study[1], we came to the conclusion t...
Activation of NF-E2-related factor 2 (Nrf2) signaling could protect cells from ultra violet (UV) radiation. We aim to provoke Nrf2 activation via downregulating its inhibitor Keap1 by microRNA-141 ("miR-141"). In both human retinal pigment epithelium cells (RPEs) and retinal ganglion cells (RGCs), forced-expression of miR-141 downregulated Keap1, causing Nrf2 stabilization, accumulation and nuc...
An organic semiconductor laser, simply fabricated by UV-nanoimprint lithography (UV-NIL), that is pumped with a pulsed InGaN LED is demonstrated. Molecular weight optimization of the polymer gain medium on a nanoimprinted polymer distributed feedback resonator enables the lowest reported UV-NIL laser threshold density of 770 W cm(-2) , establishing the potential for scalable organic laser fabri...
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