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            濟南發光字用熒光粉尚待創新

            頁面更新時間:2015-06-01 13:43 來源:未知 作者:admin 點擊:

            近年來,在照明領域最引人關注的事件是半導體照明的興起。20世紀90年代中期,日本日亞化學公司的Nakamura等人經過不懈努力,突破了制造藍光發光二極管(LED)的關鍵技術,并由此開發出以熒光材料覆蓋藍光LED產生白光光源的技術。半導體照明具有綠色環保、壽命超長、高效節能、抗惡劣環境、結構簡單、體積小、重量輕、響應快、工作電壓低及安全性好的特點,因此被譽為繼白熾燈、日光燈和節能燈之后的第四代照明電光源,或稱為21世紀綠色光源。美國、日本及歐洲均注入大量人力和財力,設立專門的機構推動半導體照明技術的發展。

            In recent years, the most interesting event in the area of lighting is the rise of semiconductor lighting. In the mid-90s of the 20th century, by the Japanese company Nichia Nakamura et al through unremitting efforts, break through the manufacture of blue light emitting diode (LED) is the key technology, and thus develop to fluorescent material covers blue light led to generate white light source technology. Semiconductor lighting with green environmental protection, long life, high efficiency and energy saving, anti harsh environment, simple structure, small volume, light weight, response quickly, working voltage is low and the safety is good, so it is known as following the incandescent lamp, fluorescent lamp and energy-saving lamp after the fourth generation lighting electric light source, or green light source in the 21st century. The United States, Japan and Europe are injecting a lot of manpower and financial resources, the establishment of specialized agencies to promote the development of semiconductor lighting technology.

            濟南發光字實現白光有多種方式,而開發較早、已實現產業化的方式是在LED芯片上涂敷熒光粉而實現白光發射。

            Ji'nan luminous character to achieve a variety of ways to achieve white, and the development of an earlier, the way has been realized in the LED chip coated with fluorescent powder and the realization of white light emission.

            濟南發光字 http://www.xubclan.com/ 采用熒光粉實現白光主要有三種方法,但它們并沒有完全成熟,由此嚴重地影響白光LED在照明領域的應用。具體來說:

            Ji'nan light emitting words using phosphor to achieve white mainly there are three ways, but they are not completely mature, and thus severely affect the application of white LED in the lighting field. Specifically:

            第一種方法是在藍色LED芯片上涂敷能被藍光激發的黃色熒光粉,芯片發出的藍光與熒光粉發出的黃光互補形成白光。該技術被日本Nichia公司壟斷,而且這種方案的一個原理性的缺點就是該熒光體中Ce3+離子的發射光譜不具連續光譜特性,顯色性較差,難以滿足低色溫照明的要求,同時發光效率還不夠高,需要通過開發新型的高效熒光粉來改善。

            The first method is coated with blue LED chip can be blue light yellow phosphor, blue and yellow light emitted by the chip emit yellow light complementary form white. The technology is Japan Nichia monopoly, and the disadvantages of this scheme is a principle is of Ce3 + ions in the phosphor emission spectra with continuous spectrum characteristic, color is poor, it is difficult to meet the low color temperature lighting requirements, at the same time luminous efficiency is not high enough, need through the development of new and high efficiency fluorescent powder to improve.

            第二種實現方法是藍色LED芯片上涂覆綠色和紅色熒光粉,通過芯片發出的藍光與熒光粉發出的綠光和紅光復合得到白光,顯色性較好。但是,這種方法所用熒光粉有效轉換效率較低,尤其是紅色熒光粉的效率需要較大幅度的提高。

            The second realization method is blue LED chip coated with green and red phosphor, blue and red phosphor issued by the chip emit green and red composite to get white, color rendering is better. However, the effective conversion efficiency of fluorescent powder is lower, especially the efficiency of red phosphor is needed to improve the efficiency of the phosphor powder..

            第三種實現方法是在紫光或紫外光LED芯片上涂敷三基色或多種顏色的熒光粉,利用該芯片發射的長波紫外光(370nm-380nm)或紫光(380nm-410nm)來激發熒光粉而實現白光發射,該方法顯色性更好,但同樣存在和第二種方法相似的問題,且目前轉換效率較高的紅色和綠色熒光粉多為硫化物體系,這類熒光粉發光穩定性差、光衰較大,因此開發高效的、低光衰的白光LED用熒光粉已成為一項迫在眉睫的工作。

            The third method is in the violet or ultraviolet LED chip coated tricolor or multiple color fluorescent powder, using the chip emit UVA light 370nm-380nm or violet 380nm-410nm to stimulate phosphor and realize white light emission, the method significantly better color, but also the existence and the second method similar to the problem, and the transformation efficiency of red and green fluorescence powder for sulfide system, this kind of phosphor poor stability, attenuation is larger, so the development of efficient, low depreciation of white LED fluorescent powder has become an imminent, in imminent.

            我們是國內率先進行LED濟南發光字用高效低光衰熒光粉研究的研究機構。最近,通過與我國臺灣合作伙伴的聯合攻關,多種采用熒光粉的彩色LED被開發出來了。

            We are the first domestic research institutions LED Ji'nan light with high efficiency and low light decay phosphor research. Recently, a variety of color LED using fluorescent powder was developed by the joint efforts of our country's Taiwan partners..

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