Benzobisoxazole cruciforms: a tunable, cross-conjugated platform for the generation of deep blue OLED materials

被引：44

作者：

Chavez, Ramiro, III ^{[1
]}

Cai, Min ^{[2
,3
]}

Tlach, Brian ^{[1
]}

Wheeler, David L. ^{[4
]}

Kaudal, Rajiv ^{[2
,3
]}

Tsyrenova, Ayuna ^{[2
,3
,5
]}

Tomlinson, Aimee L. ^{[4
]}

Shinar, Ruth ^{[6
,7
]}

Shinar, Joseph ^{[2
,3
]}

Jeffries-EL, Malika ^{[1
]}

机构：

[1] Iowa State Univ, Dept Chem, 1605 Gilman Hall, Ames, IA 50011 USA

[2] US DOE, Ames Lab, Ames, IA 50011 USA

[3] Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA

[4] Univ North Georgia, Dept Chem & Biochem, 82 Coll Circle, Dahlonega, GA 30041 USA

[5] Natl Univ Sci & Technol NUST MISiS, Moscow, Russia

[6] Iowa State Univ, Microelect Res Ctr, Ames, IA 50011 USA

[7] Iowa State Univ, Dept Elect & Comp Engn, Ames, IA 50011 USA

来源：

JOURNAL OF MATERIALS CHEMISTRY C | 2016年 / 4卷 / 17期

基金：

美国国家科学基金会;

关键词：

LIGHT-EMITTING-DIODES; STRUCTURE-PROPERTY RELATIONSHIPS; ELECTRONIC-PROPERTIES; PI-SYSTEMS; POLYMERS; FLUOROPHORES; DESIGN; MODEL; BIS(DEHYDROBENZOANNULENO)BENZENES; TETRAKIS(PHENYLETHYNYL)BENZENES;

D O I：

10.1039/c5tc03622d

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Four new cross-conjugated small molecules based on a central benzo[1,2-d: 4,5-d']bisoxazole moiety possessing semi-independently tunable HOMO and LUMO levels were synthesized and the properties of these materials were evaluated experimentally and theoretically. The molecules were thermally stable with 5% weight loss occurring well above 350 degrees C. The cruciforms all exhibited blue emission in solution ranging from 433-450 nm. Host-guest OLEDs fabricated from various concentrations of these materials using the small molecule host 4,4'-bis(9-carbazolyl)-biphenyl (CBP) exhibited deep blue-emission with Commission Internationale de L'Eclairage (CIE) coordinates of (0.15 <= x <= 0.17, 0.05 <= y <= 0.11), and maximum luminance efficiencies as high as similar to 2 cd A(-1). These results demonstrate the potential of benzobisoxazole cruciforms as emitters for developing high-performance deep blue OLEDs.

引用

页码：3765 / 3773

页数：9

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