Spectral redistribution of waveguided emission in BEH-PPV films

被引：2

作者：

Cury, LA ^{[1
]}

Miranda, PB

机构：

[1] Univ Fed Minas Gerais, Dept Fis, Inst Ciencias Exatas, BR-30123970 Belo Horizonte, MG, Brazil

[2] Univ Estadual Paulista, Fac Ciencias, Dept Fis, BR-17015970 Bauru, SP, Brazil

来源：

MOLECULAR CRYSTALS AND LIQUID CRYSTALS | 2002年 / 374卷

关键词：

BEH-PPV; photoluminescence; self-absorption; thin-film waveguides; spectral redistribution; conjugated polymers;

D O I：

10.1080/10587250210473

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We report on spectral redistribution of the photoluminescence (PL) emission from the edge of thin-film planar waveguides of the conjugated polymer BEH-PPV [Poly(2,5-bis(2'-ethyl-hexyl)-1,4-phenylenevinylene] induced by self-absorption in the polymer film. The PL spectra present drastic changes and displace to longer wavelengths with increasing self-absorption. We observe an enhancement of the absolute PL intensity at longer wavelengths, which was interpreted as due to re-emission of self-absorbed photons. The significant efficiency for the PL re-emission suggests the use of self-absorption as a mechanism for tuning the emission into the near infrared.

引用

页码：445 / 450

页数：6

共 4 条

[1] LIGHT-EMITTING-DIODES BASED ON CONJUGATED POLYMERS [J].

BURROUGHES, JH ;

BRADLEY, DDC ;

BROWN, AR ;

MARKS, RN ;

MACKAY, K ;

FRIEND, RH ;

BURN, PL ;

HOLMES, AB .

NATURE, 1990, 347 (6293) :539-541

[2] Semiconducting polymer distributed feedback lasers [J].

McGehee, MD ;

Diaz-Garcia, MA ;

Hide, F ;

Gupta, R ;

Miller, EK ;

Moses, D ;

Heeger, AJ .

APPLIED PHYSICS LETTERS, 1998, 72 (13) :1536-1538

[3] PHOTOINDUCED ELECTRON-TRANSFER FROM A CONDUCTING POLYMER TO BUCKMINSTERFULLERENE [J].

SARICIFTCI, NS ;

SMILOWITZ, L ;

HEEGER, AJ ;

WUDL, F .

SCIENCE, 1992, 258 (5087) :1474-1476

[4] Red-green-blue light emission from a thin film electroluminescence device based on parahexaphenyl [J].

Tasch, S ;

Brandstatter, C ;

Meghdadi, F ;

Leising, G ;

Froyer, G ;

Athouel, L .

ADVANCED MATERIALS, 1997, 9 (01) :33-&

← 1 →