Laser emission from solutions and films containing semiconducting polymer and titanium dioxide nanocrystals

被引：292

作者：

Hide, F ^{[1
]}

Schwartz, BJ ^{[1
]}

DiazGarcia, MA ^{[1
]}

Heeger, AJ ^{[1
]}

机构：

[1] UNIV CALIF LOS ANGELES, DEPT CHEM & BIOCHEM, LOS ANGELES, CA 90095 USA

来源：

CHEMICAL PHYSICS LETTERS | 1996年 / 256卷 / 4-5期

关键词：

D O I：

10.1016/0009-2614(96)00450-2

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We report laser emission from solutions and dilute blend films containing a semiconducting polymer, poly(2-methoxy,5(2'-ethyl-hexyloxy)-1,4-phenylene-vinylene) (MEH-PPV), and titanium dioxide (TiO2) nanocrystals under pulsed optical excitation at 532 and 435 nm. Thr TiO2 nanoparticles multiply scatter photons in the active polymer medium such that gain exceeds loss above a critical excitation threshold, Above threshold, the emission spectrum narrows significantly. Solid state lasing is observed from free standing films of MEH-PPV and TiO2 in polystyrene. This is the first demonstration of lasing with a semiconducting polymer in the solid slate as the active medium.

引用

页码：424 / 430

页数：7

共 30 条

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