Significant progress has been made in the conversion of organic thin films to efficient light-emitting devices

According to the U.S. "science" magazine reported in the materials research society recently held a meeting, researchers in Japan, Germany and the United States reported that they had been in the organic thin film into efficient light emitting device and other aspects of significant progress. Because these thin films can be made of cheap organic materials, the cost of organic light-emitting devices is likely to be very low. Experts estimate that the first light emitting organic light-emitting diodes will be listed in 2007. At present, the luminous efficiency and brightness of the diode are increasing rapidly.

Japan Yamagata University led Kido experts said at the meeting, he and his colleagues have produced a efficiency of 57 LM / W white light-emitting diode, the efficiency is almost with the fluorescent lamp, the efficiency is 4 times of incandescent lamp.

The United States Princeton University experts and organic light emitting diode Forrest Kido claimed that they add a special coating on the glass at the top of the organic light emitting diode, the light emitting efficiency is greatly improved. After the wood panel has added an anti reflective coating to the light emitting diode, the efficiency has been increased from 36 LM / w to a factor of 57 lumens per watt. Dressel, of the University of technology in Germany, said: "the use of organic light emitting diode lighting may replace the fluorescent lamp, but the current cost and stability of the lamp in this regard, there are still problems in the." The group has joined a consortium of Japanese companies that are currently developing large-scale, low-cost manufacturing of large flat panel displays.

Led to replace the traditional incandescent and fluorescent lamps, lighting has become a major trend in the market. Incandescent lamp has 90% of the energy into heat rather than light, fluorescent light conversion rate is only 70%. For decades, researchers have been developing semiconductor based light-emitting diodes to replace incandescent and fluorescent lamps. At present, the red light produced by inorganic compounds and other color light emitting diode, has been widely used in traffic lights and taillights. Although inorganic light emitting diodes have been put on the market, but because of the high cost can not be used for general lighting.

Ge Corp led expert Dougall said: a few years ago, no one concerned about the white light-emitting diode. Now, people are interested in the development of white light emitting diode, is that it can create a flat panel display for mobile phones and televisions, the world's $100 billion a year market, lighting market is two times." It is said that the wooden door group has produced 36 cm x 36 cm light emitting diode flat panel display, is expected to put the commercial market in two years.