Recent advances in organic light-emitting diodes based on pure organic room temperature phosphorescence materials

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Abstract

Pure organic room temperature phosphorescence (RTP) materials have attracted extensive attention in recent years due to their unique characteristics, such as flexible design method, low toxicity, low cost, as well as the ease of production at scale. The involvement of triplet state and direct radiative transition from the triplet state show that RTP materials have great potential as a new generation emitter in organic light-emitting diodes (OLEDs). Based on the mechanism of phosphorescence, various methods have been developed to achieve RTP emissions in the crystal state. However, the observation of RTP in the thin film state is much more difficult to achieve because of the lower degree of rigidity and suppression of the non-radiative transition. In this mini-review, molecular design strategies developed to achieve RTP emissions and their application in OLEDs are summarized and discussed. The conclusion and outlook point to great potential as well as the challenges for the continued study of pure organic RTP materials-based OLEDs.

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Zhan, G., Liu, Z., Bian, Z., & Huang, C. (2019). Recent advances in organic light-emitting diodes based on pure organic room temperature phosphorescence materials. Frontiers in Chemistry. Frontiers Media S.A. https://doi.org/10.3389/fchem.2019.00305

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