Long-Persistent Luminescence from an Exciplex-Based Organic Light-Emitting Diode.

Tan, Shinichi; Jinnai, Kazuya; Kabe, Ryota; Adachi, Chihaya · Adv Mater · 2021

basic_science · Level V

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Abstract

Organic long-persistent luminescent systems (OLPLs) exhibiting long-lasting emission after photoexcitation consist of organic electron donors and acceptors, that are widely used in organic light-emitting diodes (OLEDs). Although OLPLs and OLEDs include very similar excitonic processes, long-lasting emission has never been observed in OLEDs. This study confirms the presence of long-persistent luminescence (LPL) under electrical excitation.