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济南发光字用荧光粉尚待创新

页面更新时间:2015-06-01 13:43 来源:未知 作者:admin 点击:

近年来,在照明领域最引人关注的事件是半导体照明的兴起。20世纪90年代中期,日本日亚化学公司的Nakamura等人经过不懈努力,突破了制造蓝光发光二极管(LED)的关键技术,并由此开发出以荧光材料覆盖蓝光LED产生白光光源的技术。半导体照明具有绿色环保、寿命超长、高效节能、抗恶劣环境、结构简单、体积小、重量轻、响应快、工作电压低及安全性好的特点,因此被誉为继白炽灯、日光灯和节能灯之后的第四代照明电光源,或称为21世纪绿色光源。美国、日本及欧洲均注入大量人力和财力,设立专门的机构推动半导体照明技术的发展。

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.

济南发光字实现白光有多种方式,而开发较早、已实现产业化的方式是在LED芯片上涂敷荧光粉而实现白光发射。

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.

济南发光字 http://www.kangmingda.com/ 采用荧光粉实现白光主要有三种方法,但它们并没有完全成熟,由此严重地影响白光LED在照明领域的应用。具体来说:

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:

第一种方法是在蓝色LED芯片上涂敷能被蓝光激发的黄色荧光粉,芯片发出的蓝光与荧光粉发出的黄光互补形成白光。该技术被日本Nichia公司垄断,而且这种方案的一个原理性的缺点就是该荧光体中Ce3+离子的发射光谱不具连续光谱特性,显色性较差,难以满足低色温照明的要求,同时发光效率还不够高,需要通过开发新型的高效荧光粉来改善。

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.

第二种实现方法是蓝色LED芯片上涂覆绿色和红色荧光粉,通过芯片发出的蓝光与荧光粉发出的绿光和红光复合得到白光,显色性较好。但是,这种方法所用荧光粉有效转换效率较低,尤其是红色荧光粉的效率需要较大幅度的提高。

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..

第三种实现方法是在紫光或紫外光LED芯片上涂敷三基色或多种颜色的荧光粉,利用该芯片发射的长波紫外光(370nm-380nm)或紫光(380nm-410nm)来激发荧光粉而实现白光发射,该方法显色性更好,但同样存在和第二种方法相似的问题,且目前转换效率较高的红色和绿色荧光粉多为硫化物体系,这类荧光粉发光稳定性差、光衰较大,因此开发高效的、低光衰的白光LED用荧光粉已成为一项迫在眉睫的工作。

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.

我们是国内率先进行LED济南发光字用高效低光衰荧光粉研究的研究机构。最近,通过与我国台湾合作伙伴的联合攻关,多种采用荧光粉的彩色LED被开发出来了。

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..