Abstract
A practical correlation between selective reflectance of the semitransparent electrode and the color coordinates of light emitting from the organic light-emitting diode (OLED) has been presented in this paper. OLED technology has a great potential to substitute other technologies for lighting and display applications. For full-color displays, use of color filters is the most acceptable technique to convert a white light into primary colors (red, green, and blue). In a microcavity design, it is possible to control the emission color of an OLED by incorporating an active layer in between two metal mirrors. A careful design of a microcavity makes possible the realization of mixed colors in a single OLED structure. In this work, a metal microcavity has been designed with an organic stack, sandwiched between two metal mirrors, a fully reflective mirror-aluminum (Al) and semitransparent metal mirror-silver (Ag). The Commission International de l’Eclairage (CIE) color coordinates of a blue fluorescent (460 nm) OLED was tuned from (1.85, 1.54) to (2.36, 2.63) by selective reflectance.
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Acknowledgements
Financial and technical support from Samtel Group of Industries, Indian Institute of Technology Kanpur and Samtel Center for Display Technologies at IIT Kanpur, India, is gratefully acknowledged. Authors would also like to thank Professor R. Vijaya and Dr. K. N. Narayanan Unni (IIT Kanpur) for stimulating discussions.
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Singh, R., Shukla, V.K. Impact of selective reflectance in a microcavity-based organic light-emitting diode. Indian J Phys 93, 343–347 (2019). https://doi.org/10.1007/s12648-018-1299-9
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DOI: https://doi.org/10.1007/s12648-018-1299-9