{"title":"磷中心手性多共振热激活延迟荧光发射器实现窄带高效圆极化电致发光","authors":"Xiang-Ji Liao, Shuai Xing, Jia-Jun Hu, Xiang-Zhi Wang, You-Xuan Zheng","doi":"10.31635/ccschem.024.202404691","DOIUrl":null,"url":null,"abstract":"<p>For studies concerning circularly polarized multiple resonances thermally activated delayed fluorescence (CP-MR-TADF) emitters with central chirality, only carbon element has been applied. Herein, for the first time, we report a CP-MR-TADF material with phosphorus central chirality containing <i>tert</i>-butyl(phenyl)phosphine oxide, (<i>R</i>/<i>S</i>)-4-POtBuCzB, as enantiomers exhibiting the narrowest full-width at half-maximum (FWHM = 20 nm) among the reported CP-TADF molecules, with symmetric CP photoluminescence and a dissymmetry factor (|<i>g</i><sub>PL</sub>|) of 0.54 × 10<sup>−3</sup>. Concurrently, 2-POtBuCzB further demonstrated that phosphine participated in photophysical performance regulation. Notably, CP organic light-emitting diodes (CP-OLEDs) using (<i>R</i>/<i>S</i>)-4-POtBuCzB showed remarkable CPEL activity with a |<i>g</i><sub>EL</sub>| of 0.61 × 10<sup>−3</sup>, and OLED with 2-POtBuCzB, achieving a maximum external quantum efficiency (EQE<sub>max</sub>) of 37.0%. These results demonstrate that introducing chiral phosphorus fragments into the MR-TADF skeleton is an efficacious approach for CP-MR-TADF materials and devices.</p>","PeriodicalId":9810,"journal":{"name":"CCS Chemistry","volume":"4 1","pages":""},"PeriodicalIF":9.4000,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Phosphorus Central Chiral Multiresonance Thermally Activated Delayed Fluorescence Emitter Towards Narrowband and Efficient Circularly Polarized Electroluminescence\",\"authors\":\"Xiang-Ji Liao, Shuai Xing, Jia-Jun Hu, Xiang-Zhi Wang, You-Xuan Zheng\",\"doi\":\"10.31635/ccschem.024.202404691\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>For studies concerning circularly polarized multiple resonances thermally activated delayed fluorescence (CP-MR-TADF) emitters with central chirality, only carbon element has been applied. Herein, for the first time, we report a CP-MR-TADF material with phosphorus central chirality containing <i>tert</i>-butyl(phenyl)phosphine oxide, (<i>R</i>/<i>S</i>)-4-POtBuCzB, as enantiomers exhibiting the narrowest full-width at half-maximum (FWHM = 20 nm) among the reported CP-TADF molecules, with symmetric CP photoluminescence and a dissymmetry factor (|<i>g</i><sub>PL</sub>|) of 0.54 × 10<sup>−3</sup>. Concurrently, 2-POtBuCzB further demonstrated that phosphine participated in photophysical performance regulation. Notably, CP organic light-emitting diodes (CP-OLEDs) using (<i>R</i>/<i>S</i>)-4-POtBuCzB showed remarkable CPEL activity with a |<i>g</i><sub>EL</sub>| of 0.61 × 10<sup>−3</sup>, and OLED with 2-POtBuCzB, achieving a maximum external quantum efficiency (EQE<sub>max</sub>) of 37.0%. These results demonstrate that introducing chiral phosphorus fragments into the MR-TADF skeleton is an efficacious approach for CP-MR-TADF materials and devices.</p>\",\"PeriodicalId\":9810,\"journal\":{\"name\":\"CCS Chemistry\",\"volume\":\"4 1\",\"pages\":\"\"},\"PeriodicalIF\":9.4000,\"publicationDate\":\"2024-10-28\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"CCS Chemistry\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.31635/ccschem.024.202404691\",\"RegionNum\":1,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"CHEMISTRY, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"CCS Chemistry","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.31635/ccschem.024.202404691","RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
Phosphorus Central Chiral Multiresonance Thermally Activated Delayed Fluorescence Emitter Towards Narrowband and Efficient Circularly Polarized Electroluminescence
For studies concerning circularly polarized multiple resonances thermally activated delayed fluorescence (CP-MR-TADF) emitters with central chirality, only carbon element has been applied. Herein, for the first time, we report a CP-MR-TADF material with phosphorus central chirality containing tert-butyl(phenyl)phosphine oxide, (R/S)-4-POtBuCzB, as enantiomers exhibiting the narrowest full-width at half-maximum (FWHM = 20 nm) among the reported CP-TADF molecules, with symmetric CP photoluminescence and a dissymmetry factor (|gPL|) of 0.54 × 10−3. Concurrently, 2-POtBuCzB further demonstrated that phosphine participated in photophysical performance regulation. Notably, CP organic light-emitting diodes (CP-OLEDs) using (R/S)-4-POtBuCzB showed remarkable CPEL activity with a |gEL| of 0.61 × 10−3, and OLED with 2-POtBuCzB, achieving a maximum external quantum efficiency (EQEmax) of 37.0%. These results demonstrate that introducing chiral phosphorus fragments into the MR-TADF skeleton is an efficacious approach for CP-MR-TADF materials and devices.
期刊介绍:
CCS Chemistry, the flagship publication of the Chinese Chemical Society, stands as a leading international chemistry journal based in China. With a commitment to global outreach in both contributions and readership, the journal operates on a fully Open Access model, eliminating subscription fees for contributing authors. Issued monthly, all articles are published online promptly upon reaching final publishable form. Additionally, authors have the option to expedite the posting process through Immediate Online Accepted Article posting, making a PDF of their accepted article available online upon journal acceptance.