Charge carrier dynamics in small-molecule- And polymer-based donor-acceptor blends

Keshab Paudel; Brian Johnson; Mattson Thieme; John E. Anthony; Oksana Ostroverkhova

doi:10.1557/opl.2014.956

Charge carrier dynamics in small-molecule- And polymer-based donor-acceptor blends

Keshab Paudel, Brian Johnson, Mattson Thieme, John E. Anthony, Oksana Ostroverkhova

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Abstract

We present a comparative study of optical absorption, photoluminescence (PL), and photoconductivity in bulk heterojunctions comprising a high performance functionalized anthradithiophene (ADT) derivative or the benchmark polymer P3HT as donor and functionalized pentacene (Pn) derivative or PCBM as acceptor. Of all D/A blends studied, the ADT/PCBM blend exhibited the highest charge photogeneration efficiencies under 532 nm excitation, leading to the highest amplitudes of time-resolved and continuous wave (cw) photocurrents. At nanosecond time scales after photoexcitation, both ADT-TES-F-based blends and the P3HT/Pn-TIPS-F8 blend exhibited photocurrents which were higher by a factor of 2-10, depending on the blend, than that in the P3HT/PCBM blend. However, cw photocurrents showed a different trend, with the ADT-TES-F/PCBM blend exhibiting only a factor of-2.5 higher photoresponse than that in the P3HT/PCBM blends, and the ADT-TES-F- And P3HT- based blends with Pn-TIPS-F8 showing a factor of-1.5-2.5 lower photoresponse than that in the P3HT/PCBM blend, due to other contributions, such as that of charge trap-limited transport, to cw photoresponse.

Original language	English
Title of host publication	Fundamentals of Organic Semiconductors - Synthesis, Morphology, Devices and Theory
Editors	D. Seferos, L. Kozycz
Pages	13-18
Number of pages	6
ISBN (Electronic)	9781510806146
DOIs	https://doi.org/10.1557/opl.2014.956
State	Published - 2015
Event	2014 MRS Fall Meeting - Boston, United States Duration: Nov 30 2014 → Dec 5 2014

Publication series

Name	Materials Research Society Symposium Proceedings
Volume	1733
ISSN (Print)	0272-9172

Conference

Conference	2014 MRS Fall Meeting
Country/Territory	United States
City	Boston
Period	11/30/14 → 12/5/14

Bibliographical note

Publisher Copyright:
© 2015 Materials Research Society.

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

Access to Document

10.1557/opl.2014.956

Cite this

Paudel, K., Johnson, B., Thieme, M., Anthony, J. E., & Ostroverkhova, O. (2015). Charge carrier dynamics in small-molecule- And polymer-based donor-acceptor blends. In D. Seferos, & L. Kozycz (Eds.), Fundamentals of Organic Semiconductors - Synthesis, Morphology, Devices and Theory (pp. 13-18). (Materials Research Society Symposium Proceedings; Vol. 1733). https://doi.org/10.1557/opl.2014.956

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title = "Charge carrier dynamics in small-molecule- And polymer-based donor-acceptor blends",

abstract = "We present a comparative study of optical absorption, photoluminescence (PL), and photoconductivity in bulk heterojunctions comprising a high performance functionalized anthradithiophene (ADT) derivative or the benchmark polymer P3HT as donor and functionalized pentacene (Pn) derivative or PCBM as acceptor. Of all D/A blends studied, the ADT/PCBM blend exhibited the highest charge photogeneration efficiencies under 532 nm excitation, leading to the highest amplitudes of time-resolved and continuous wave (cw) photocurrents. At nanosecond time scales after photoexcitation, both ADT-TES-F-based blends and the P3HT/Pn-TIPS-F8 blend exhibited photocurrents which were higher by a factor of 2-10, depending on the blend, than that in the P3HT/PCBM blend. However, cw photocurrents showed a different trend, with the ADT-TES-F/PCBM blend exhibiting only a factor of-2.5 higher photoresponse than that in the P3HT/PCBM blends, and the ADT-TES-F- And P3HT- based blends with Pn-TIPS-F8 showing a factor of-1.5-2.5 lower photoresponse than that in the P3HT/PCBM blend, due to other contributions, such as that of charge trap-limited transport, to cw photoresponse.",

author = "Keshab Paudel and Brian Johnson and Mattson Thieme and Anthony, {John E.} and Oksana Ostroverkhova",

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year = "2015",

doi = "10.1557/opl.2014.956",

language = "English",

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Paudel, K, Johnson, B, Thieme, M, Anthony, JE & Ostroverkhova, O 2015, Charge carrier dynamics in small-molecule- And polymer-based donor-acceptor blends. in D Seferos & L Kozycz (eds), Fundamentals of Organic Semiconductors - Synthesis, Morphology, Devices and Theory. Materials Research Society Symposium Proceedings, vol. 1733, pp. 13-18, 2014 MRS Fall Meeting, Boston, United States, 11/30/14. https://doi.org/10.1557/opl.2014.956

Charge carrier dynamics in small-molecule- And polymer-based donor-acceptor blends. / Paudel, Keshab; Johnson, Brian; Thieme, Mattson et al.
Fundamentals of Organic Semiconductors - Synthesis, Morphology, Devices and Theory. ed. / D. Seferos; L. Kozycz. 2015. p. 13-18 (Materials Research Society Symposium Proceedings; Vol. 1733).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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AB - We present a comparative study of optical absorption, photoluminescence (PL), and photoconductivity in bulk heterojunctions comprising a high performance functionalized anthradithiophene (ADT) derivative or the benchmark polymer P3HT as donor and functionalized pentacene (Pn) derivative or PCBM as acceptor. Of all D/A blends studied, the ADT/PCBM blend exhibited the highest charge photogeneration efficiencies under 532 nm excitation, leading to the highest amplitudes of time-resolved and continuous wave (cw) photocurrents. At nanosecond time scales after photoexcitation, both ADT-TES-F-based blends and the P3HT/Pn-TIPS-F8 blend exhibited photocurrents which were higher by a factor of 2-10, depending on the blend, than that in the P3HT/PCBM blend. However, cw photocurrents showed a different trend, with the ADT-TES-F/PCBM blend exhibiting only a factor of-2.5 higher photoresponse than that in the P3HT/PCBM blends, and the ADT-TES-F- And P3HT- based blends with Pn-TIPS-F8 showing a factor of-1.5-2.5 lower photoresponse than that in the P3HT/PCBM blend, due to other contributions, such as that of charge trap-limited transport, to cw photoresponse.

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Charge carrier dynamics in small-molecule- And polymer-based donor-acceptor blends

Abstract

Publication series

Conference

Bibliographical note

ASJC Scopus subject areas

Access to Document

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