Ultrafast terahertz photoconductivity of bulk heterojunction materials reveals high carrier mobility up to nanosecond time scale.

Carlito Ponseca Jr; Arkady Yartsev; Ergang Wang; Mats R. Andersson; Dimali Vithanage; Villy Sundstrom

doi:10.1021/ja301757y

Ultrafast terahertz photoconductivity of bulk heterojunction materials reveals high carrier mobility up to nanosecond time scale.

Carlito Ponseca Jr, Arkady Yartsev, Ergang Wang, Mats R. Andersson, Dimali Vithanage, Villy Sundstrom

Research output: Contribution to journal › Article › peer-review

61 Citations (Scopus)

Abstract

The few-picosecond (ps) decay of terahertz (THz) photoconductivity typically observed for conjugated polymer:fullerene blends (at excitation fluencies ∼10 ¹⁵ photons/cm ² per pulse) is shown to be a result of charge pair annihilation for two polymer:PCBM blends. At a factor of 100 lower excitation density, the THz decay is in the hundreds of ps time scale, implying that very high carrier mobility (∼0.1 cm ² V ^-1 s ^-1) prevails for long time after charge formation, of importance for free charge formation in organic solar cells.

Original language	English
Pages (from-to)	11836-11839
Number of pages	4
Journal	Journal of the American Chemical Society
Volume	134
Issue number	29
DOIs	https://doi.org/10.1021/ja301757y
Publication status	Published - 25 Jul 2012

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1021/ja301757y

Cite this

@article{64fdbb6db4c9489c9a0193f6bf1f3587,

title = "Ultrafast terahertz photoconductivity of bulk heterojunction materials reveals high carrier mobility up to nanosecond time scale.",

abstract = "The few-picosecond (ps) decay of terahertz (THz) photoconductivity typically observed for conjugated polymer:fullerene blends (at excitation fluencies ∼10 15 photons/cm 2 per pulse) is shown to be a result of charge pair annihilation for two polymer:PCBM blends. At a factor of 100 lower excitation density, the THz decay is in the hundreds of ps time scale, implying that very high carrier mobility (∼0.1 cm 2 V -1 s -1) prevails for long time after charge formation, of importance for free charge formation in organic solar cells.",

author = "{Ponseca Jr}, Carlito and Arkady Yartsev and Ergang Wang and Andersson, {Mats R.} and Dimali Vithanage and Villy Sundstrom",

year = "2012",

month = jul,

day = "25",

doi = "10.1021/ja301757y",

language = "English",

volume = "134",

pages = "11836--11839",

journal = "Journal of the American Chemical Society",

issn = "0002-7863",

publisher = "ACS Publications",

number = "29",

}

TY - JOUR

T1 - Ultrafast terahertz photoconductivity of bulk heterojunction materials reveals high carrier mobility up to nanosecond time scale.

AU - Ponseca Jr, Carlito

AU - Yartsev, Arkady

AU - Wang, Ergang

AU - Andersson, Mats R.

AU - Vithanage, Dimali

AU - Sundstrom, Villy

PY - 2012/7/25

Y1 - 2012/7/25

N2 - The few-picosecond (ps) decay of terahertz (THz) photoconductivity typically observed for conjugated polymer:fullerene blends (at excitation fluencies ∼10 15 photons/cm 2 per pulse) is shown to be a result of charge pair annihilation for two polymer:PCBM blends. At a factor of 100 lower excitation density, the THz decay is in the hundreds of ps time scale, implying that very high carrier mobility (∼0.1 cm 2 V -1 s -1) prevails for long time after charge formation, of importance for free charge formation in organic solar cells.

AB - The few-picosecond (ps) decay of terahertz (THz) photoconductivity typically observed for conjugated polymer:fullerene blends (at excitation fluencies ∼10 15 photons/cm 2 per pulse) is shown to be a result of charge pair annihilation for two polymer:PCBM blends. At a factor of 100 lower excitation density, the THz decay is in the hundreds of ps time scale, implying that very high carrier mobility (∼0.1 cm 2 V -1 s -1) prevails for long time after charge formation, of importance for free charge formation in organic solar cells.

UR - http://www.scopus.com/inward/record.url?scp=84864213087&partnerID=8YFLogxK

U2 - 10.1021/ja301757y

DO - 10.1021/ja301757y

M3 - Article

SN - 0002-7863

VL - 134

SP - 11836

EP - 11839

JO - Journal of the American Chemical Society

JF - Journal of the American Chemical Society

IS - 29

ER -

Ultrafast terahertz photoconductivity of bulk heterojunction materials reveals high carrier mobility up to nanosecond time scale.

Abstract

UN SDGs

Access to Document

Other files and links

Fingerprint

Cite this