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A single-layer permeation barrier for organic light-emitting displays
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FIG. 1.

Schematic cross sections of a BOLED and a TOLED coated with a permeation barrier layer, and the direction of visible light emission.

Image of FIG. 2.

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FIG. 2.

(a) Photographs of the luminescent areas of BOLEDs and TOLEDs coated with barrier layers, taken at the start and after periods of accelerated storage at and 85% relative humidity. The initial active area of each pixel is . The photographs were taken through the glass substrates. (b) Average active pixel area of the four TOLEDs and BOLEDs plotted against duration of accelerated storage. The horizontal line denotes the lifetime criterion of 50% active area. The active area of the BOLEDs reached 50% in , that of TOLEDs reached 50% in .

Image of FIG. 3.

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FIG. 3.

Summary of film properties in function of gas flow ratio and rf power, respectively, during film deposition. [(a) and (b)] Intensity of the Si–O–Si peak at obtained from Fourier transform infrared transmittance. [(c) and (d)] Contact angle of a water droplet on the film surface. [(e) and (f)] Trend of nanoindentation hardness. [(g) and (h)] Surface roughness measured by atomic force microscopy. The horizontal lines in (a)–(f) represent the properties of a thermally grown film and of a pp-HMDSO film.

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/content/aip/journal/apl/92/10/10.1063/1.2890432
2008-03-11
2014-04-25

Abstract

Films of a hybrid material with part- part-silicone character are deposited as environmental barriers on bottom-emitting and on transparent organic light-emitting diodes. Devices coated with this barrier have lifetimes of up to when stored at and 85% relative humidity, by far exceeding the industrial requirement of . The intensity of the Si–O–Si absorption at the wavenumber of , the wetting angle by water, and the indentation hardness support the interpretation of a homogeneous material with the properties of a -silicone hybrid. The films remain intact over of bending to tensile strain.

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Scitation: A single-layer permeation barrier for organic light-emitting displays
http://aip.metastore.ingenta.com/content/aip/journal/apl/92/10/10.1063/1.2890432
10.1063/1.2890432
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