OLED lighting device materials and structures TFT Display Modules

OLED lighting efficiency reached a level of application of the fluorescent lamp and its power efficiency 70lm / W to reach at least about 100lm / W OLED lighting device has been reported, but it is manufactured in the extreme case out, usually efficiency of OLED lighting devices manufactured only 30 to 50lm / W, Obviously, this falls far short of requirements.lcd module 
From the standpoint of the material, to achieve such a high efficiency, a phosphorescent material must be used up to 100% of the luminous efficiency, the green and red phosphorescent materials have been no problem, need to be solved is to play an important role in the blue phosphorescent material . Now is the lack of high efficiency, high stability of the blue phosphorescent material is the major technical difficulties hinder the efficiency of OLED lighting devices, so the development of practical high efficiency, high stability Blu-ray phosphorescent material production technology has become the by the major research direction of the field.
From the standpoint of the device structure, the device structure design is the key to improve the device efficiency, good device structure comprises multiple light emitting layer structure, the single light-emitting layer structure, the laminate structure and a top-emission structure. Multiple light emitting layer structure is prepared white OLED device up to a relatively mature technology, the performance of the device is the best, but the complexity of the process may affect future OLED lighting device yield and production cost issues, and this The structure of the device is sometimes also the shortcomings of the spectrum and chromaticity coordinates with the driving voltage changes. However, the multiple light emitting layer structure due to the good performance of the device, and the spectrum and chromaticity coordinates entirely with the problem of the driving voltage changes by the design of the device structure solved, so if they can be controlled and improved in yield, then the structure or after all, a mass production technology, Philips, UDC, Novaled currently in use is the structure.
Although the single light emitting structure can be avoided to some extent the color purity with the drive voltage changes also may simplify the process in the production process, but not satisfactory efficiency and stability problems also make such a structure can not be applied in practical applications .
The laminate structure has a single light emitting layer and the light emitting layer structure, it is the device structure through the charge generating layer a plurality of light emitting cells connected in series, the laminated device have a very good spectral stability, and high light emitting efficiency, high luminance and excellent stability and other characteristics of the laminate structure in practical applications, the device is very competitive, if it can be further improved in the laminate structure complex process, the laminate structure of the device is expected to become Illumination The white OLED production of mainstream technology.graphic lcd display module 
Top emission structure due to its advantages in the aspects of effective light-emitting area and improve efficiency and may also be lighting a white OLED technology development, and other structures and top emission structure combined can develop more high-performance white OLED.