Protecting OLEDs and flexible screens from the damaging caused by O2 & H20 vapour diffusion
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The latest generation of flexible light-emitting diodes (OLED) displays, and other optoelectronic components are extremely susceptible to degradation from both moisture and oxygen, securing proper protection against these vapours is a decisive factor in achieving a long working life. This is a major hurdle in the introduction of flexible OLEDs into the commercial market.
This problem is typically resolved by the use of polymeric substrates with multi-layered barrier coatings comprising alternating organic/inorganic layers but it is critical that the vapour permeability of each layer and structure needs to be accurately determined and controlled – and that's where Versaperm comes in.
Versaperm is a world leader in vapour permeability technology and has developed techniques and instrumentation for measuring the coatings both individually and as compound structures. Independent measurements are also produced for water vapour and oxygen permeability. The equipment can also be used for detecting the prevalence of the pinholes that commonly are produced by current manufacturing techniques.
The Versaperm equipment offers an advanced, fast and efficient way to test and measure vapour permeability of alternative plastic barrier films along with the sealants used for permanent closure. The system is simple to use, fast and extremely accurate.
Results are typically accurate in the Parts Per Million (PPM) range (PPB in some cases and can be produced for several vapour depositions, material samples, screens or enclosures all at the same time. It can also measure them under a wide range of environmental conditions.
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