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

62 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)

SDG 7 Affordable and Clean Energy

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 = "American Chemical Society",

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 - https://www.scopus.com/pages/publications/84864213087

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