daohang fenxiangbox searchbox qikanlogonew daohangnew searchboxnew navrightzone footerzone paper
English
Chinese 简体中文 English English
Home > Journals > ACS Applied Electronic Materials
‹ Previous Article Next Article ›

Power Efficiency Enhancement of Organic Light-Emitting Diodes Due to the Favorable Horizontal Orientation of a Naphthyridine-Based Thermally Activated Delayed Fluorescence Luminophore Power Efficiency Enhancement of Organic Light-Emitting Diodes Due to the Favorable Horizontal Orientation of a Naphthyridine-Based Thermally Activated Delayed Fluorescence Luminophore AITranslate

Rasa Keruckiene; Eimantas Vijaikis; ChiaHsun Chen; BoYen Lin; JingXiang Huang; ChunChieh Chu; YiChung Dzeng; Chi Chen; JiunHaw Lee; TienLung Chiu; Simas Macionis; Jonas Keruckas; Rita Butkute; Juozas Vidas Grazulevicius
Kaunas University of Technology; Kaunas University of Technology; National Taiwan University; National Dong Hwa University; National Taiwan University; National Taiwan University;Research Center for Applied Sciences, Academia Sinica;Research Center for Applied Sciences, Academia Sinica; National Taiwan University; Yuan Ze University; Kaunas University of Technology; Kaunas University of Technology; Kaunas University of Technology; Kaunas University of Technology
AITranslate
Publisher: ACS
Share Citation Information Add to Favorites

    Scan to share on WeChat or Moments

Use WeChat scan.
Share with WeChat friends or Moments

Abstract AITranslate

Four emitters based on the naphthyridine acceptor moiety and various donor units exhibiting thermally activated delayed fluorescence (TADF) were designed and synthesized. The emitters exhibited excellent TADF properties with a small ΔEST and a high photoluminescence quantum yield. A green TADF organic light-emitting diode based on 10-(4-(1,8-naphthyridin-2-yl)phenyl)-10H-phenothiazine exhibited a maximum external quantum efficiency of 16.4% with Commission Internationale de L’éclairage coordinates of (0.368, 0.569) as well as a high current and power efficiency of 58.6 cd/A and 57.1 lm/W, respectively. The supreme power efficiency is a record-high value among the reported values of devices with naphthyridine-based emitters. This results from its high photoluminescence quantum yield, efficient TADF, and horizontal molecular orientation. The molecular orientations of the films of the host and the host doped with the naphthyridine emitter were explored by angle-dependent photoluminescence and grazing-incidence small-angle X-ray scattering (GIWAXS). The orientation order parameters (ΘADPL) were found to be 0.37, 0.45, 0.62, and 0.74 for the naphthyridine dopants with dimethylacridan, carbazole, phenoxazine, and phenothiazine donor moieties, respectively. These results were also proven by GIWAXS measurement. The derivative of naphthyridine and phenothiazine was shown to be more flexible to align with the host and to show the favorable horizontal molecular orientation and crystalline domain size, benefiting the outcoupling efficiency and contributing to the device efficiency.

KeyWords AITranslate

naphthyridine angledependent photoluminescence grazingincidence smallangle Xray scattering thermally activated delayedShow More
No data

Basic Information:

DOI：https://doi.org/10.1021/acsaelm.2c01529

Chinese Library Classification Number:

Citation Information:

Four emitters based on the naphthyridine acceptor moiety and various donor units exhibiting thermally activated delayed fluorescence (TADF) were designed and synthesized. The emitters exhibited excellent TADF properties with a small ΔEST and a high photoluminescence quantum yield. A green TADF organic light-emitting diode based on 10-(4-(1,8-naphthyridin-2-yl)phenyl)-10H-phenothiazine exhibited a maximum external quantum efficiency of 16.4% with Commission Internationale de L’éclairage coordinates of (0.368, 0.569) as well as a high current and power efficiency of 58.6 cd/A and 57.1 lm/W, respectively. The supreme power efficiency is a record-high value among the reported values of devices with naphthyridine-based emitters. This results from its high photoluminescence quantum yield, efficient TADF, and horizontal molecular orientation. The molecular orientations of the films of the host and the host doped with the naphthyridine emitter were explored by angle-dependent photoluminescence and grazing-incidence small-angle X-ray scattering (GIWAXS). The orientation order parameters (ΘADPL) were found to be 0.37, 0.45, 0.62, and 0.74 for the naphthyridine dopants with dimethylacridan, carbazole, phenoxazine, and phenothiazine donor moieties, respectively. These results were also proven by GIWAXS measurement. The derivative of naphthyridine and phenothiazine was shown to be more flexible to align with the host and to show the favorable horizontal molecular orientation and crystalline domain size, benefiting the outcoupling efficiency and contributing to the device efficiency.

quote

GB/T 7714-2015 [1] Rasa Keruckiene, Eimantas Vijaikis, ChiaHsun Chen, et al. ACS Applied Electronic Materials, 2023(5). DOI:10.1021/acsaelm.2c01529.
MLA [1] Rasa Keruckiene, et al., ACS Applied Electronic Materials, no. 5, 2023, https://doi.org/10.1021/acsaelm.2c01529.
APA [1] Rasa Keruckiene, Eimantas Vijaikis, ChiaHsun Chen, BoYen Lin, JingXiang Huang, ChunChieh Chu, YiChung Dzeng, Chi Chen, JiunHaw Lee, TienLung Chiu, Simas Macionis, Jonas Keruckas, Rita Butkute, & Juozas Vidas Grazulevicius. (2023). ACS Applied Electronic Materials(5). https://doi.org/10.1021/acsaelm.2c01529
IEEE [1] Rasa Keruckiene, Eimantas Vijaikis, ChiaHsun Chen, BoYen Lin, JingXiang Huang, ChunChieh Chu, YiChung Dzeng, Chi Chen, JiunHaw Lee, TienLung Chiu, Simas Macionis, Jonas Keruckas, Rita Butkute, and Juozas Vidas Grazulevicius, ACS Applied Electronic Materials, no. 5, 2023, doi: 10.1021/acsaelm.2c01529. keywords: {naphthyridine angledependent photoluminescence grazingincidence smallangle Xray scattering thermally activated delayedShow More}