Efficient Persistent Room Temperature Phosphorescence in Organic Amorphous Materials under Ambient Conditions

被引：727

作者：

Hirata, Shuzo ^{[1
]}

Totani, Kenro ^{[2
]}

Zhang, Junxiang ^{[3
,4
]}

Yamashita, Takashi ^{[5
]}

Kaji, Hironori ^{[6
]}

Marder, Seth R. ^{[3
,4
]}

Watanabe, Toshiyuki ^{[2
]}

Adachi, Chihaya ^{[7
]}

机构：

[1] Tokyo Inst Technol, Dept Polymer Sci & Organ Mat Engn, Tokyo 1528552, Japan

[2] Tokyo Univ Agr & Technol, Div Appl Chem, Grad Sch Engn, Koganei, Tokyo 1848588, Japan

[3] Georgia Inst Technol, COPE, Atlanta, GA 30332 USA

[4] Georgia Inst Technol, Sch Chem & Biochem, Atlanta, GA 30332 USA

[5] Tokyo Univ Sci, Noda, Chiba 2788510, Japan

[6] Kyoto Univ, Inst Chem Res, Kyoto 6110011, Japan

[7] Kyushu Univ, Ctr Organ Photon & Elect Res OPERA, Nishi Ku, Fukuoka 8190395, Japan

来源：

ADVANCED FUNCTIONAL MATERIALS | 2013年 / 23卷 / 27期

基金：

日本学术振兴会;

关键词：

phosphorescence; room temperature phosphorescence; long lifetime; persistent emission; steroid; deuteration; POLYMER SOLIDS; BENZOPHENONE PHOSPHORESCENCE; RADIATIONLESS TRANSITIONS; ENERGY-TRANSFER; PHOTOCHEMISTRY; LUMINESCENCE; STATE; MECHANISM; EMISSION; DECAY;

D O I：

10.1002/adfm.201203706

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Persistent emission with a long lifetime (>1 s) from organic materials can only be observed at a low temperature, because of the significant nonradiative deactivation pathway that occurs at room-temperature (RT). If organic materials with persistent RT emission in air could be developed, they could potentially be utilized for a variety of applications. Here, organic host-guest materials with efficient persistent RT phosphorescence (RTP) are developed by minimizing the nonradiative deactivation pathway of triplet excitons. The nonradiative deactivation pathway is dependent on both nonradiative deactivation of the guest and quenching by diffusional motion of the host. The rigidity and oxygen barrier properties of the steroidal compound used as the host suppressed the quenching, and the aromatic hydrocarbon used as the guest is highly deuterated to minimize nonradiative deactivation of the guest. Red-green-blue persistent RTP with a lifetime >1 s and a quantum yield >10% in air is realized for a pure organic material.

引用

页码：3386 / 3397

页数：12

共 41 条

[1] Nearly 100% internal phosphorescence efficiency in an organic light-emitting device [J].