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A Diboron-Based Thermally Activated Delayed Fluorescent Material for Versatile Applications of Organic Light-Emitting Diodes AITranslate

ChiaMin Hsieh; YiKuan Chen; Jian Lei; PangYu Chou; SongTing Hsieh; ChangLun Ko; WenYi Hung; TienLin Wu; ChienHong Cheng;
National Tsing Hua University; National Tsing Hua University; National Tsing Hua University; National Tsing Hua University; National Tsing Hua University; National Taiwan Ocean University; National Taiwan Ocean University; National Tsing Hua University; National Sun Yat-sen University
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Publisher: ACS
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Abstract AITranslate

Thermally activated delayed fluorescence (TADF) organic light-emitting diodes (OLEDs) have attracted public attention due to their high external quantum efficiency (EQE) and implication in future display technology. Despite their improved efficiency, TADF-based OLEDs still suffer from serious efficiency roll-off and short operational lifetimes. Herein, a diboron-based molecule, PhCzDBA, is designed and its device exhibits a maximum EQE (EQEmax) of 33.8% and only slight roll-off (EQEmax of 31.5% at 1000 cd m–2 and 28.8% at 3000 cd m–2). Furthermore, it shows superior stability among reported TADF devices (LT80 of 113 h at the initial luminance of 3000 cd m–2). Remarkably, its nondoped OLED shows a high EQEmax of 17.7% with a λmax > 580 nm, surpassing most orange nondoped OLEDs. Moreover, a decent white OLED device with an EQEmax of 16.4% and a color rendering index (CRI) of 73 can be achieved by incorporating a simple sandwich emitting layer configuration, exhibiting the potential and diverse applications in many aspects.

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DOI：https://doi.org/10.1021/acsmaterialslett.3c00626

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Citation Information:

Thermally activated delayed fluorescence (TADF) organic light-emitting diodes (OLEDs) have attracted public attention due to their high external quantum efficiency (EQE) and implication in future display technology. Despite their improved efficiency, TADF-based OLEDs still suffer from serious efficiency roll-off and short operational lifetimes. Herein, a diboron-based molecule, PhCzDBA, is designed and its device exhibits a maximum EQE (EQEmax) of 33.8% and only slight roll-off (EQEmax of 31.5% at 1000 cd m–2 and 28.8% at 3000 cd m–2). Furthermore, it shows superior stability among reported TADF devices (LT80 of 113 h at the initial luminance of 3000 cd m–2). Remarkably, its nondoped OLED shows a high EQEmax of 17.7% with a λmax > 580 nm, surpassing most orange nondoped OLEDs. Moreover, a decent white OLED device with an EQEmax of 16.4% and a color rendering index (CRI) of 73 can be achieved by incorporating a simple sandwich emitting layer configuration, exhibiting the potential and diverse applications in many aspects.

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GB/T 7714-2015 [1] ChiaMin Hsieh, YiKuan Chen, Jian Lei, et al. ACS Materials Letters, 2023(5). DOI:10.1021/acsmaterialslett.3c00626.
MLA [1] ChiaMin Hsieh, et al., ACS Materials Letters, no. 5, 2023, https://doi.org/10.1021/acsmaterialslett.3c00626.
APA [1] ChiaMin Hsieh, YiKuan Chen, Jian Lei, PangYu Chou, SongTing Hsieh, ChangLun Ko, WenYi Hung, TienLin Wu, & ChienHong Cheng. (2023). ACS Materials Letters(5). https://doi.org/10.1021/acsmaterialslett.3c00626
IEEE [1] ChiaMin Hsieh, YiKuan Chen, Jian Lei, PangYu Chou, SongTing Hsieh, ChangLun Ko, WenYi Hung, TienLin Wu, and ChienHong Cheng, ACS Materials Letters, no. 5, 2023, doi: 10.1021/acsmaterialslett.3c00626.