Unraveling the Inhomogeneously Broadened Absorption Spectrum of Conjugated Polymers by Single-Molecule Light-Harvesting Action Spectroscopy

被引：18

作者：

Walter, Manfred J. ^{[1
]}

Lupton, John M. ^{[1
]}

机构：

[1] Univ Utah, Dept Phys & Astron, Salt Lake City, UT 84112 USA

来源：

PHYSICAL REVIEW LETTERS | 2009年 / 103卷 / 16期

基金：

美国国家科学基金会;

关键词：

TEMPERATURE; MIGRATION;

D O I：

10.1103/PhysRevLett.103.167401

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The distribution of chromophores in single polymer chains is revealed by photoluminescence excitation spectroscopy under excitation of the backbone and detection of emission from an end cap. Spectral broadening in excitation exceeds that in emission. An increase in vibronic coupling for shorter (higher energy) chromophores is resolved, leading to intrinsic spectral broadening and making higher energy units more effective donors. The results suggest routes to increasing absorption breadth while minimizing disorder as required for efficient photovoltaics.

引用

页数：4

共 16 条

[1] Single-molecule spectroscopy of conjugated polymers [J].

Barbara, PF ;

Gesquiere, AJ ;

Park, SJ ;

Lee, YJ .

ACCOUNTS OF CHEMICAL RESEARCH, 2005, 38 (07) :602-610

[2] Site-selective fluorescence spectroscopy of conjugated polymers and oligomers [J].

Bässler, H ;

Schweitzer, B .

ACCOUNTS OF CHEMICAL RESEARCH, 1999, 32 (02) :173-182

[3] Coherent Intrachain Energy Migration in a Conjugated Polymer at Room Temperature [J].

Collini, Elisabetta ;

Scholes, Gregory D. .

SCIENCE, 2009, 323 (5912) :369-373

[4]

*EPAPS, EPRLTAO103035943, P12112

[5] Observation of very narrow linewidths in the fluorescence excitation spectra of single conjugated polymer chains at 1.2 K [J].

Feist, Florian A. ;

Tommaseo, Giovanni ;

Basche, Thomas .

PHYSICAL REVIEW LETTERS, 2007, 98 (20)

[6]

Hausser KW, 1935, Z PHYS CHEM B-CHEM E, V29, P391

[7] Exciton migration in rigid-rod conjugated polymers:: An improved Forster model [J].

Hennebicq, E ;

Pourtois, G ;

Scholes, GD ;

Herz, LM ;

Russell, DM ;

Silva, C ;

Setayesh, S ;

Grimsdale, AC ;

Müllen, K ;

Brédas, JL ;

Beljonne, D .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2005, 127 (13) :4744-4762

[8] Low temperature single molecule spectroscopy using vibronic excitation and dispersed fluorescence detection [J].

Kiraz, A ;

Ehrl, M ;

Bräuchle, C ;

Zumbusch, A .

JOURNAL OF CHEMICAL PHYSICS, 2003, 118 (24) :10821-10824

[9] Electronic excitation energy transfer between two single molecules embedded in a polymer host [J].

Metivier, Remi ;

Nolde, Fabian ;

Muellen, Klaus ;

Basche, Thomas .

PHYSICAL REVIEW LETTERS, 2007, 98 (04)

[10] Illuminating single molecules in condensed matter [J].

Moerner, WE ;

Orrit, M .

SCIENCE, 1999, 283 (5408) :1670-+

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