Exciton-stimulated molecular transformation in organic light-emitting diodes.

Chang, Yi-Lu; Rao, Ying-Li; Gong, Shaolong; Ingram, Grayson L; Wang, Suning; Lu, Zheng-Hong · Adv Mater · 2014

basic_science · Level V

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Abstract

An exciton-stimulated molecular transformation in an organic light-emitting diode (OLED) on a time scale of a few seconds under electrical bias is shown to reach nearly 100% under standard operating conditions, leading to color switching. It is reversible in both a thin film and an OLED when sufficient thermal energy is supplied. Such an exciton-stimulated molecular transformation suggests a new process which may be exploited for applications such as electrochromic and memory devices.