Temporal response of optically pumped organic semiconductor lasers and its implication for reaching threshold under electrical excitation

被引：89

作者：

Giebink, N. C. ^{[1
,2
,3
]}

Forrest, S. R. ^{[2
,3
]}

机构：

[1] Princeton Univ, Dept Elect Engn, Princeton, NJ 08544 USA

[2] Univ Michigan, Dept Elect Engn & Comp Sci, Ann Arbor, MI 48109 USA

[3] Univ Michigan, Dept Phys, Ann Arbor, MI 48109 USA

来源：

PHYSICAL REVIEW B | 2009年 / 79卷 / 07期

关键词：

excitons; optical pumping; organic semiconductors; radiation quenching; semiconductor lasers; STATE;

D O I：

10.1103/PhysRevB.79.073302

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We study the step response of optically pumped organic semiconductor lasers and find that lasing is sustained for < 150 ns following pump turn on due to annihilation quenching of guest singlet with host triplet excitons. We derive a general criterion for reaching threshold that critically depends on the pump rise time, the singlet-triplet quenching rate, and the spin statistics of exciton formation. These results imply that singlet-triplet annihilation alone fundamentally restricts lasing by electrical excitation to conditions that are not practically feasible in organic semiconductors.

引用

页数：4

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