White light LED development plan

In recent years, the general lighting solid white light emitting diode (SSL-LED) lighting technology rapid development has become a new hot technology worldwide, from all over the world, especially the close attention of industrialized countries. The problem of energy is around the world, especially an urgent problem in industrialized countries. General lighting in electric energy consumption accounted for a considerable proportion, with the rapid development in recent years, SSL-LED technology, advanced industrialized countries in the United States and Canada have accelerated the pace of development in this field, in order to realize the incandescent lamp, in general lighting area with white SSL-LED to replace fluorescent lamp has been used for a long time and high the target intensity discharge lamp. Obviously, the countries in the world are quietly undergoing a general lighting with the new technology revolution, is expected in the next 5 to 10 years SSL-LED market will exceed the first incandescent lamp, and is more than the market application of fluorescent lamp and high intensity discharge lamp. The prediction based on the U.S. Department of energy and Optoelectronics Industry Development Association jointly developed and made the development plan of two LED lighting technology. These two routes are also the world is walking, that is, general lighting with inorganic LED and organic LED (OLED). The former is the development way of the U. S. Department of energy, the optoelectronics industry development association and the National Electronic Manufacturers Association jointly held, has more advantages than the latter, and probably the first to enter the field of general lighting applications. Technology development goals in order to maintain the leading position in the world, the United States Department of energy, the optoelectronics industry development association and the National Electronic Manufacturers Association jointly formulated the general lighting in the United States before 2020 with SSL-LED semiconductor technology development planning, and in 2002 the implementation of the plan in the process encountered technical problems and development goals were modified and enhance the detailed proof and comprehensive development, determine the performance parameters, specific development schedule, investment cost and operating costs etc.. Table 1 lists the development progress and the main performance parameters of semiconductor SSL-LED from 2002 to 2020, and makes a detailed comparison with the traditional incandescent lamp, fluorescent lamp and high intensity discharge lighting technology. Table 1 lists the parameters, except for the color display indicators, and determine the other target data is the choice of factors of economic competition ability based on the color display flexibility and programmability "soft factors not considered". The last three lines of Table 1 also list the cost factors of the investment cost and the working life. America the development plan in time from 2002 onwards is divided into three stages, the first two stages for 5 years, and the third stage for 8 years; index of luminous efficiency are positioning of 20lm/W in 2002 and 2007 2002 ~ 75lm/W, 2007 ~ 150lm/W and 2012 ~ 200lm/W in 2020 2012. But from the current world white SSL -LED luminous efficiency of 20 ~ 30lm/W, the indicators have been more than the current incandescent bulb luminous efficiency (16lm/W). While life is related to another key parameter of the technology development prospects, the development of strategic planning goals for 20000 ~ 100000h, this is so far any non solid light emitting device are unmatched. The final total delivery cost is much lower than the 5.63$/ (Mlm / h), 1.00$/ (Mlm / h) and 0.83$/ (Mlm / h) of incandescent lamp, fluorescent lamp and high intensity discharge lamp. Only these indicators are sufficient to show the superiority of the semiconductor SSL- LED technology and will eventually replace the incandescent lamp, fluorescent lamp and high intensity discharge lamp technology prospects. Obviously, the planning is according to the total shipping cost to determine the total cost of SSL-LED shipped within 5 years is lower than that of the incandescent lamp, 10 years lower than the fluorescent lamp and high intensity discharge lamp. Compared with the traditional lighting technology, SSL-LED general lighting semiconductor technology has the following unique advantages: small volume, flexible and convenient use; high luminous efficiency; low power consumption, energy saving; environment protection; not like the traditional lighting equipment must be used as glass vacuum packaging, no poisonous gas and mercury pollution etc. easy maintenance and maintenance;; extremely long service life, is 10 times more than traditional lighting; the application range is more extensive, such as city traffic lights, car lighting, aviation, military, industrial and home etc.. Based on the above reasons, SSL-LED general semiconductor lighting technology will have a huge impact on the United States in the following three aspects. To save energy consumption, save costs and reduce power plants, which is conducive to environmental protection, and makes people's visual experience richer and more comfortable. A semiconductor integrated circuit to solve the key technical issues way as 30 years ago is in its infancy, the semiconductor SSL-LED lighting technology is also in the stage of development, the main national investment in basic research is the basic guarantee for the development of the technology to accelerate its development and accelerate the replacement of lighting technology traditionally, it is very necessary. Technology development trend of from the current light emitting semiconductor SSL-LED, 1 development goals listed in the table is really practical, moreover, these goals are also forward-looking. An important issue so expert group composed of universities, national laboratories and industry together for the vast majority of the need for substantive research conducted extensive research, to reach a consensus, and classifies these important topics. These topics include the contents of the long-term basic research and the development of short-term engineering and the whole process. 1, substrate, buffer layer and epitaxial growth technology