| 摘要 |
A light-emitting device comprises a substrate (13), a light-emissive layer (15) disposed over the substrate, and a grating (17) for aligning the light-emissive layer (15). The grating (17) aligns molecules of the emissive layer (15), so that the device emits polarised. The grating also reduces wave guiding effects in the device, so increasing the useful light output of the device. The invention may be applied to an organic light-emitting device (OLED). The grating (17) may align substantially the entire area of the light-emissive layer (15) in a first direction. In this case, substantially the entire emissive area of the device will emit layer of a single polarisation. Alternatively, the grating (17) may align a first region of the light-emissive layer in a first direction and may align a second region of the light-emissive layer in a second direction different from the first direction.
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