Triphenylamine disubstituted naphthalene diimide: elucidation of excited states involved in TADF and application in near-infrared organic light emitting diodes

被引：49

作者：

Higginbotham, Heather F. ^{[1
]}

Pander, Piotr ^{[1
]}

Rybakiewicz, Renata ^{[2
]}

Etherington, Marc K. ^{[1
]}

Maniam, Subashani ^{[3
]}

Zagorska, Malgorzata ^{[4
]}

Pron, Adam ^{[4
]}

Monkman, Andrew P. ^{[1
]}

Data, Przemyslaw ^{[1
,5
,6
]}

机构：

[1] Univ Durham, Phys Dept, South Rd, Durham DH1 3LE, England

[2] Cardinal Stefan Wyszynski Univ Warsaw, Fac Math & Nat Sci, Sch Exact Sci, Woycickiego 1-3 Bldg 21, PL-01938 Warsaw, Poland

[3] Monash Univ, Sch Chem, Clayton, Vic, Australia

[4] Warsaw Univ Technol, Fac Chem, Noakowskiego 3, PL-00664 Warsaw, Poland

[5] Silesian Tech Univ, Fac Chem, Ks M Strzody 9, PL-44100 Gliwice, Poland

[6] Polish Acad Sci, Ctr Polymer & Carbon Mat, M Curie Sklodowskiej 34, PL-41819 Zabrze, Poland

来源：

JOURNAL OF MATERIALS CHEMISTRY C | 2018年 / 6卷 / 30期

基金：

欧盟地平线“2020”; 英国工程与自然科学研究理事会;

关键词：

ACTIVATED DELAYED FLUORESCENCE; PHOTOLUMINESCENCE QUANTUM YIELDS; REDOX PROPERTIES; EFFICIENCY; EMISSION; ELECTRON; ACCEPTOR; PHOTOPHYSICS; CHEMISTRY; BISIMIDES;

D O I：

10.1039/c8tc02936a

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

It is demonstrated that a naphthalene diimide core disubstituted with triphenylamine can be used as a thermally activated delayed fluorescence emitter in organic Eight emitting diodes. Detailed spectroscopic studies demonstrated unusual host effects on the photophysical properties of this material. In particular, we were able to deduce recombination pathways and the role of the host and temperature in increasing/decreasing the TADF contribution in overall emission. Furthermore, stemming from these host effects on the geometry of the emitter we discover different local triplet states involved in the TADF mechanism. We elucidate this confusing situation to show that simply measuring low-temperature phosphorescence does not always give the energy of the local triplet involved in TADF. The studies carried out in a nonpolar polymer and the OLED host were completed by NIR OLED fabrication showing promising characteristics.

引用

页码：8219 / 8225

页数：7

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