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Silver is currently the best light-receiving material. It is known that the reflectivity of silver in each band is the best. If the silver-plated layer is not used, the light-emitting efficiency of the LED will drop by 10-20% at different color temperatures. Therefore, the use of the silver-plated layer can make the initial light effect of the LED high, but under the influence of the external environment for a long time, the light effect will be severely caused by the blackening of the silver layer, and the light-receiving layer material that can be used at present should be taken into consideration. Light efficiency and maintenance have always been a problem that fish and bear's paw can't have. This is a problem that the LED industry is eager to solve.
Lin Jizhi, vice president of research and development at Hengri Optoelectronics, said that Hengri Optoelectronics has developed a special light-receiving layer between the LED package sealing material and the lead frame to prevent vulcanization in order to solve the problem of reducing the efficiency of vulcanization and oxidation of the silver plating layer. Phenomenon, thereby suppressing the decrease in color rendering.
It has been certified by IST (test conditions: temperature 50 ° C, humidity 75% (RH), H2S = 3 ppm, 168 hr) to confirm the reaction without vulcanization, which can completely avoid the blackening of the stent and cause light decay and color rendering. The problem of decline. To achieve the low light decay, high reflectivity of the realm, the performance of each color temperature is not inferior to the performance of silver or even higher than the reflectivity of silver, so that LED truly achieves high efficiency, low light decay energy saving, green energy demand. The latest technology is now fully integrated with the Lightan® IIICOB integrated light source. 
It is understood that at present, a large number of silver-plated brackets are used for LEDs, and the silver-plated layer on the brackets usually reacts (vulcanizes) with the hydrogen sulfide in the air intruded through the sealing material to become black, thereby causing a gradual decrease in efficiency and color rendering. This is the most difficult problem to overcome for high-power LEDs in outdoor environments.