{"title":"Enhancing Triplet–Triplet Annihilation Upconversion Performance Through Anthracene–Carbazole Interactions for Organic Optoelectronic Applications","authors":"Kai-Hong Hsieh, Yuan-Zhen Zhuang, Jing-Xiang Huang, Zheng-Yu Wei, Yong-Yun Zhang, Jiun-Haw Lee, Tien-Lung Chiu, Man-kit Leung","doi":"10.1002/adpr.202300344","DOIUrl":null,"url":null,"abstract":"<p>Three carbazole-substituted anthracene <b>2CbzAn</b>, <b>26CbzAn</b>, and <b>246CbzAn</b> have been developed. The introduction of these carbazole substituents could generate more triplet states with energy levels close to 2× E(T1) that could successfully facilitate the triplet-triplet annihilation upconversion (TTA-UC) process to achieve high upconversion quantum yield (UCQY). This observation aligns with the Adachi theory about TTA-UC mechanisms. In organic light-emitting diode (OLED) device investigation, in a non-doped state show an external quantum efficiency (EQE<sub>max</sub>) of 5.82% with exceptional pure-blue emission (CIE<i>y</i> of 0.101), and the <b>DPaNIF</b> doped <b>DMPPP/26CbzAn</b> bilayer structure reaches an impressive EQE<sub>max</sub> of 11.12%.</p>","PeriodicalId":7263,"journal":{"name":"Advanced Photonics Research","volume":"5 10","pages":""},"PeriodicalIF":3.7000,"publicationDate":"2024-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/adpr.202300344","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Advanced Photonics Research","FirstCategoryId":"1085","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1002/adpr.202300344","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
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Abstract
Three carbazole-substituted anthracene 2CbzAn, 26CbzAn, and 246CbzAn have been developed. The introduction of these carbazole substituents could generate more triplet states with energy levels close to 2× E(T1) that could successfully facilitate the triplet-triplet annihilation upconversion (TTA-UC) process to achieve high upconversion quantum yield (UCQY). This observation aligns with the Adachi theory about TTA-UC mechanisms. In organic light-emitting diode (OLED) device investigation, in a non-doped state show an external quantum efficiency (EQEmax) of 5.82% with exceptional pure-blue emission (CIEy of 0.101), and the DPaNIF doped DMPPP/26CbzAn bilayer structure reaches an impressive EQEmax of 11.12%.
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