THE FÖRSTER-TYPE EXCITON QUENCHING MECHANISM AND ITS IMPACT TO THE QUANTUM EFFICIENCY AND EXCITON DIFFUSION IN ORGANIC SEMICONDUCTOR

  • Yoga Divayana Faculty of Engineering of Udayana University, Indonesia School ofElectrical and Electronic Engineering, Nanyang Technological University, Singapore.

Abstract

Organic light-emitting diodes (OLEDs) have emerged as one of the most important generallighting technologies of the future. The current state-of-the-art OLED utilizes various differentlayers which function separately as carriers transport, carriers and excitons blocker, and emittinglayer. The emission layer of the OLED is normally formed by a host-guest system obtained byco-evaporating a small amount of guest molecule in the matrix of host material. It is generallyaccepted that in a host-guest system, concentration quenching is caused by molecules aggregation.As concentration of guest molecule increases, a drop in quantum efficiency is followed by a redshiftin the emission spectrum, characteristics of aggregate state. Here we show that concentrationquenching is also caused by another Förster-type interaction. We investigate this Förster-typeexciton quenching process in various organic molecules and its effect to the exciton diffusion.

Published
2012-10-30
How to Cite
Divayana, Y. (2012). THE FÖRSTER-TYPE EXCITON QUENCHING MECHANISM AND ITS IMPACT TO THE QUANTUM EFFICIENCY AND EXCITON DIFFUSION IN ORGANIC SEMICONDUCTOR. PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL), 1(1), 20 - 24. Retrieved from http://journal.unj.ac.id/unj/index.php/prosidingsnf/article/view/6145