Author/Authors :
Safonov، نويسنده , , A.N and Jory، نويسنده , , M and Matterson، نويسنده , , B.J and Lupton، نويسنده , , J.M and Salt، نويسنده , , M.G and Wasey، نويسنده , , J.A.E and Barnes، نويسنده , , W.L. and Samuel، نويسنده , , I.D.W، نويسنده ,
Abstract :
We report the use of wavelength-scale microstructure to control the intensity, spectrum and polarisation of light-emission from thin polymer films. It is shown that periodic corrugation of the emissive layer can substantially increase the efficiency of light-emission. Detailed photoluminescence (PL) studies of the angle dependence of the emission together with theoretical modelling show that the observed emission enhancement is associated with Bragg-scattering of waveguided light out of the polymer layer. The application of this approach to increase the efficiency of a light-emitting diode (LED) is demonstrated.
Keywords :
Light sources , Photoluminescence , Polymer LED , quantum optics , waveguides
