Narrowband deep-blue organic light-emitting diode featuring an organoboron-based emitter

被引：1130

作者：

Kondo, Yasuhiro ^{[1
]}

Yoshiura, Kazuki ^{[2
]}

Kitera, Sayuri ^{[2
]}

Nishi, Hiroki ^{[2
]}

Oda, Susumu ^{[2
]}

Gotoh, Hajime ^{[2
]}

Sasada, Yasuyuki ^{[1
]}

Yanai, Motoki ^{[1
]}

Hatakeyama, Takuji ^{[2
]}

机构：

[1] JNC Petrochem Corp, Ichihara, Chiba, Japan

[2] Kwansei Gakuin Univ, Sch Sci & Technol, Dept Chem, Sanda, Japan

来源：

NATURE PHOTONICS | 2019年 / 13卷 / 10期

基金：

日本科学技术振兴机构; 日本学术振兴会;

关键词：

ACTIVATED DELAYED FLUORESCENCE; MOLECULAR DESIGN; ELECTROLUMINESCENCE; NANOCRYSTALS; BORYLATION; EMISSION; SINGLET;

D O I：

10.1038/s41566-019-0476-5

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Luminescent materials that exhibit narrowband emission are vital for full-colour displays. Here, we report a thermally activated delayed-fluorescence material that exhibits ultra-pure blue emission with full-width at half-maximum of just 14 nm. The emitter consists of five benzene rings connected by two boron and four nitrogen atoms and two diphenylamino substituents. The multiple resonance effect of the boron and nitrogen atoms induces significant localization of the highest occupied and lowest unoccupied molecular orbitals on different atoms to minimize not only the vibronic coupling between the ground state (S-0) and the singlet excited state (S-1) but also the energy gap between the S-1 state and triplet excited state (T-1). Organic light-emitting diode devices employing the emitter emit light at 469 nm with full-width at half-maximum of 18 nm with an external quantum efficiency of 34.4% at the maximum and 26.0% at 1,000 cd m(-2).

引用

页码：678 / +

页数：6

共 30 条

[21] Effective method for the computation of optical spectra of large molecules at finite temperature including the Duschinsky and Herzberg-Teller effect:: The Qx band of porphyrin as a case study [J].