Optical Interference as a Tool to Describe the Spectral Changes Created by a Tunable and Controllable Excitons Confinement

Abstract

In this paper we address the optical process occurring in a standard Alq3 based OLED device using a classical electromagnetic framework. A comprehensive comparison with experimental results is made with an excellent agreement. The insertion of a hole blocking layer (HBL) is used to confine excitons formation and relaxation within a well defined region allowing us to separate optical effects from other mechanisms. By tuning the cavity thickness, we can demonstrate destructive interference into the wavelength region corresponding to Alq3 peak emission. Electroluminescence measurements in an integrating sphere further supports the idea that the interferences scheme used here describes well the optical behaviour of our samples.

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Correspondence to Christophe Féry.

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Féry, C., Ciná, S., Doyeux, H. et al. Optical Interference as a Tool to Describe the Spectral Changes Created by a Tunable and Controllable Excitons Confinement. MRS Online Proceedings Library 871, 913 (2005). https://doi.org/10.1557/PROC-871-I9.13

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