Carrier density and quantum efficiency measurements in conjugated polymers: Ultrafast photoinduced IRAV absorption

Daniel Moses; Arthur Dogariu; Alan J. Heeger

doi:10.1016/S0040-6090(99)00993-1

Carrier density and quantum efficiency measurements in conjugated polymers: Ultrafast photoinduced IRAV absorption

Daniel Moses
, Arthur Dogariu
, Alan J. Heeger

Research output: Contribution to journal › Conference article › peer-review

6 Scopus citations

Abstract

Ultrafast measurements of transient excited-state absorption in the spectral region spanning the infrared active vibrational active (IRAV) modes in the prototypical luminescent polymers, poly(phenylene vinylene), PPV, and poly[2-methoxy-5-(2-ethyl-hexyloxy)-(phenylene-vinylene)], MEH-PPV, reveal charge carrier generation within 100 fs after photoexcitation. The relatively large photocarrier quantum efficiency in MEH-PPV, φ₀≈0.1 in zero applied electric field, implies primary photogeneration of charge carriers. Comparison of the recombination dynamics in MEH-PPV and PPV indicates that the carrier recombination rate is sensitive to the strength of the inter-chain interaction.

Original language	English (US)
Pages (from-to)	68-71
Number of pages	4
Journal	Thin Solid Films
Volume	363
Issue number	1
DOIs	https://doi.org/10.1016/S0040-6090(99)00993-1
State	Published - Mar 1 2000
Externally published	Yes
Event	The Asia-Pacific Symposium on Organic Electroluminescent Materials and Devices - Hong Kong, Hong Kong Duration: Jun 8 1999 → Jun 11 1999

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Surfaces and Interfaces
Surfaces, Coatings and Films
Metals and Alloys
Materials Chemistry

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10.1016/S0040-6090(99)00993-1

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@article{6ce28484952d4f5f96b0561cb177dd5b,

title = "Carrier density and quantum efficiency measurements in conjugated polymers: Ultrafast photoinduced IRAV absorption",

abstract = "Ultrafast measurements of transient excited-state absorption in the spectral region spanning the infrared active vibrational active (IRAV) modes in the prototypical luminescent polymers, poly(phenylene vinylene), PPV, and poly[2-methoxy-5-(2-ethyl-hexyloxy)-(phenylene-vinylene)], MEH-PPV, reveal charge carrier generation within 100 fs after photoexcitation. The relatively large photocarrier quantum efficiency in MEH-PPV, φ0≈0.1 in zero applied electric field, implies primary photogeneration of charge carriers. Comparison of the recombination dynamics in MEH-PPV and PPV indicates that the carrier recombination rate is sensitive to the strength of the inter-chain interaction.",

author = "Daniel Moses and Arthur Dogariu and Heeger, \{Alan J.\}",

note = "Funding Information: We are grateful to Prof E.W. Van Stryland and Dr D. McBranch for providing us with AgGaSe 2 crystals, and to Jian Wang for assistance with sample preparation. Dr D. McBranch pointed out the importance of the different time scales observed for carrier decay and exciton decay. This research was supported by the Air Force Office of Scientific Research (Charles Lee, Program Officer) under F49620-99-1-0031. ; The Asia-Pacific Symposium on Organic Electroluminescent Materials and Devices ; Conference date: 08-06-1999 Through 11-06-1999",

year = "2000",

month = mar,

day = "1",

doi = "10.1016/S0040-6090(99)00993-1",

language = "English (US)",

volume = "363",

pages = "68--71",

journal = "Thin Solid Films",

issn = "0040-6090",

publisher = "Elsevier B.V.",

number = "1",

}

TY - JOUR

T1 - Carrier density and quantum efficiency measurements in conjugated polymers

T2 - The Asia-Pacific Symposium on Organic Electroluminescent Materials and Devices

AU - Moses, Daniel

AU - Dogariu, Arthur

AU - Heeger, Alan J.

N1 - Funding Information: We are grateful to Prof E.W. Van Stryland and Dr D. McBranch for providing us with AgGaSe 2 crystals, and to Jian Wang for assistance with sample preparation. Dr D. McBranch pointed out the importance of the different time scales observed for carrier decay and exciton decay. This research was supported by the Air Force Office of Scientific Research (Charles Lee, Program Officer) under F49620-99-1-0031.

PY - 2000/3/1

Y1 - 2000/3/1

N2 - Ultrafast measurements of transient excited-state absorption in the spectral region spanning the infrared active vibrational active (IRAV) modes in the prototypical luminescent polymers, poly(phenylene vinylene), PPV, and poly[2-methoxy-5-(2-ethyl-hexyloxy)-(phenylene-vinylene)], MEH-PPV, reveal charge carrier generation within 100 fs after photoexcitation. The relatively large photocarrier quantum efficiency in MEH-PPV, φ0≈0.1 in zero applied electric field, implies primary photogeneration of charge carriers. Comparison of the recombination dynamics in MEH-PPV and PPV indicates that the carrier recombination rate is sensitive to the strength of the inter-chain interaction.

AB - Ultrafast measurements of transient excited-state absorption in the spectral region spanning the infrared active vibrational active (IRAV) modes in the prototypical luminescent polymers, poly(phenylene vinylene), PPV, and poly[2-methoxy-5-(2-ethyl-hexyloxy)-(phenylene-vinylene)], MEH-PPV, reveal charge carrier generation within 100 fs after photoexcitation. The relatively large photocarrier quantum efficiency in MEH-PPV, φ0≈0.1 in zero applied electric field, implies primary photogeneration of charge carriers. Comparison of the recombination dynamics in MEH-PPV and PPV indicates that the carrier recombination rate is sensitive to the strength of the inter-chain interaction.

UR - https://www.scopus.com/pages/publications/0033895046

UR - https://www.scopus.com/pages/publications/0033895046#tab=citedBy

U2 - 10.1016/S0040-6090(99)00993-1

DO - 10.1016/S0040-6090(99)00993-1

M3 - Conference article

AN - SCOPUS:0033895046

SN - 0040-6090

VL - 363

SP - 68

EP - 71

JO - Thin Solid Films

JF - Thin Solid Films

IS - 1

Y2 - 8 June 1999 through 11 June 1999

ER -

Carrier density and quantum efficiency measurements in conjugated polymers: Ultrafast photoinduced IRAV absorption

Abstract

All Science Journal Classification (ASJC) codes

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