Role of doping concentration on the competition between amplified spontaneous emission and nonradiative energy transfer in blends of conjugated polymers

被引：29

作者：

Camposeo, A ^{[1
]}

Mele, E ^{[1
]}

Persano, L ^{[1
]}

Pisignano, D ^{[1
]}

Cingolani, R ^{[1
]}

机构：

[1] Univ Lecce, Natl Nanotechnol Lab, CNR, INFM,Distretto Tecnol ISUFI, I-73100 Lecce, Italy

来源：

PHYSICAL REVIEW B | 2006年 / 73卷 / 16期

关键词：

D O I：

10.1103/PhysRevB.73.165201

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We investigated the amplified spontaneous emission (ASE) of a blend of light emitting conjugated polymers. The effects related to the acceptor/donor polymer relative concentration on both cw photoluminescence and ASE were investigated experimentally and interpreted by a quantitative model describing ASE in presence of fast non radiative energy transfer processes. The range of acceptor concentrations where ASE does not occur is experimental determined, whereas outside such interval ASE is observed from the donor or from the acceptor polymer. In particular, the blend with 10% acceptor molecules shows ASE-induced line narrowing for excitation fluences larger than 100 mu J cm(-2), with a maximum optical gain coefficient of 8 cm(-1) and a loss coefficient as low as 0.3 cm(-1). These optical and gain properties make the investigated conjugated polymer blend an appealing material as active layer for laser devices.

引用

页数：7

共 49 条

[1] Forster energy transfer in an optical microcavity [J].

Andrew, P ;

Barnes, WL .

SCIENCE, 2000, 290 (5492) :785-788

[2] Forster energy transfer from blue-emitting polymers to colloidal CdSe/ZnS core shell quantum dots [J].

Anni, M ;

Manna, L ;

Cingolani, R ;

Valerini, D ;

Cretí, A ;

Lomascolo, M .

APPLIED PHYSICS LETTERS, 2004, 85 (18) :4169-4171

[3] Amplified spontaneous emission from a soluble thiophene-based oligomer [J].

Anni, M ;

Gigli, G ;

Cingolani, R ;

Zavelani-Rossi, M ;

Gadermaier, C ;

Lanzani, G ;

Barbarella, G ;

Favaretto, L .

APPLIED PHYSICS LETTERS, 2001, 78 (18) :2679-2681

[4] Photovoltaic performance and morphology of polyfluorene blends: A combined microscopic and photovoltaic investigation [J].

Arias, AC ;

MacKenzie, JD ;

Stevenson, R ;

Halls, JJM ;

Inbasekaran, M ;

Woo, EP ;

Richards, D ;

Friend, RH .

MACROMOLECULES, 2001, 34 (17) :6005-6013

[5] Interchain vs. intrachain energy transfer in acceptor-capped conjugated polymers [J].

Beljonne, D ;

Pourtois, G ;

Silva, C ;

Hennebicq, E ;

Herz, LM ;

Friend, RH ;

Scholes, GD ;

Setayesh, S ;

Müllen, K ;

Brédas, JL .

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2002, 99 (17) :10982-10987

[6]

Berggren M, 1997, NATURE, V389, P466

[7]

Bernius MT, 2000, ADV MATER, V12, P1737, DOI 10.1002/1521-4095(200012)12:23<1737::AID-ADMA1737>3.0.CO

[8]

2-N

[9] Bright, saturated, red-to-yellow organic light-emitting devices based on polarization-induced spectral shifts [J].

Bulovic, V ;

Shoustikov, A ;

Baldo, MA ;

Bose, E ;

Kozlov, VG ;

Thompson, ME ;

Forrest, SR .

CHEMICAL PHYSICS LETTERS, 1998, 287 (3-4) :455-460

[10]

CABANILLASGONZA.J, 2004, CHEM MATER, V16, P4305

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