Excitonic singlet-triplet ratio in a semiconducting organic thin film

被引：1069

作者：

Baldo, MA ^{[1
]}

O'Brien, DF

Thompson, ME

Forrest, SR

机构：

[1] Princeton Univ, Ctr Photon & Optoelect Mat, Dept Elect Engn, Princeton, NJ 08544 USA

[2] Princeton Univ, Princeton Mat Inst, Princeton, NJ 08544 USA

[3] Univ So Calif, Dept Chem, Los Angeles, CA 90089 USA

来源：

PHYSICAL REVIEW B | 1999年 / 60卷 / 20期

关键词：

D O I：

10.1103/PhysRevB.60.14422

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A technique is presented to determine the spin statistics of excitons formed by electrical injection in a semiconducting organic thin film. With the aid of selective addition of luminescent dyes, we generate either fluorescence or phosphorescence from the archetype organic host material aluminum tris (8-hydroxyquinoline) (Alq(3)). Spin statistics are calculated from the ratio of fluorescence to phosphorescence in the films under electrical excitation After accounting for varying photoluminescent efficiencies, we find a singlet fraction of excitons in Alq(3) of (22 +/- 3)%. [S0163-1829(99)08743-3].

引用

页码：14422 / 14428

页数：7

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