OLED lighting commercialization is facing a large area of flexible problems

The commercialization process of OLED lighting is one of the industry's most concerned about the topic at present, in the May 11, 2011 meeting of the fifth session of the Shanghai international new light & New Energy Lighting Forum with high efficiency and low cost of organic electronic lighting and display applications branch, technology roadmap for PHILPS Oled Lighting Department Director Dietrich BERTRAM global introduced OLED commercialization.

According to Guan Wenhui said, compared with other light sources, the biggest advantage of OLED is that it is a kind of planar solid-state light source, fast response, diffuse light, long life, light adjustable, high light efficiency, light texture, transparent, light shape plasticity, if using metal or plastic substrate, will achieve excellent performance flexible, attractive commercial prospects.

At present OLED light effect is rapidly increasing, the future is expected to replace the existing incandescent lamps and other traditional light source lamp. 2011 white OLED light effect is 25Lm/W in 3000cd/ square meters. Luminous efficiency is expected to double every 2-3 years. But Guan Wenhui also pointed out that when the utility efficiency reached 140Lm/W, there will be a bottleneck.

As for the light color, monochromatic and white 2010 target is tonal, after 2-3 years will gradually realize color adjustable. In terms of flexibility, Guan Wenhui said that now the OLED is made of glass substrate, the next step will be the development of film packaging, can reduce the thickness of more than 50%. Future development of the use of flexible plastic substrate, OLED will have flexibility. At present, the laboratory has developed the product, the next 5-8 years can be achieved after commercialization.

In addition, one of the main characteristics of the light source is transparent texture OLED. At the moment OLED is closed, it looks like a mirror. But after 3-5 years, with the development of technology, OLED is expected to achieve transparency in the off state. So, OLED panel will be integrated lighting, and information display and other functions. At the same time, OLED has a significant performance advantage, can use plastic or metal sheet and other flexible substrate instead of glass substrate, preparation of flexible display. Compared with the ordinary hard screen display, flexible display has many advantages: impact resistance, seismic ability, light weight, small volume, more convenient to carry, and can therefore use tape type process similar to the newspaper printing process, low cost and so on, can not meet the need to display and lighting.

Holland Khost center OLED Ton van lighting manager MOL said, how to reduce the price of OLED products to replace the traditional lighting level, including the method could be used in the technology of producing OLED is developed using R2R, the development of large, transparent electrode, deposition layer OLED.

Implementation is one of the important reasons is that the flexible screen soft screen display process in the preparation of related problems. The polymer substrate can withstand processing temperature of 100 DEG C, easy deformation under high temperature conditions, which makes the low temperature process of soft screen required by high temperature curing process with an insulating layer, and there is a conflict between the isolation column. In addition, if the relatively soft metal material is used as the cathode structure, it is easy to produce new defects in the driving process.