Improving the photocurrent in low bandgap polymer: Fullerene solar cells with molecular doping

Antonietta De Sio; Ali Veysel Tunc; Jürgen Parisi; Enrico Da Como; Elizabeth Von Hauff

doi:10.1117/12.922558

Improving the photocurrent in low bandgap polymer: Fullerene solar cells with molecular doping

Antonietta De Sio, Ali Veysel Tunc, Jürgen Parisi, Enrico Da Como, Elizabeth Von Hauff

Research output: Chapter or section in a book/report/conference proceeding › Chapter in a published conference proceeding

Abstract

We demonstrate a simple and novel technique to improve the power conversion efficiency of polymer:fullerene solar cells based on the low bandgap polymer poly[2,6-(4,4-bis-(2-ethylhexyl)-4H-cyclopenta[2,1-b;3,4-b′]dithiophene) -alt-4,7-(2,1,3-benzothiadiazole)] (PCPDTBT) and the soluble fullerene derivative PCBM. We dope the blend via cosolution with the electron accepting molecule tetrafluoro-tetracyanoquinodimethane (F4-TCNQ). Doping concentrations of F4-CNQ from 0 - 0.3 %, with respect to the weight of the polymer, were investigated. The dark current-voltage (IV) characteristics, the illuminated IV characteristics, the external quantum efficiency, and the hole mobility in dependence of the doping concentration were studied. We observe an increase in the photocurrent resulting in improved solar cell efficiencies, which corresponds to an increase in the hole mobility in the polymer. We explain this enhancement in the solar cell performance in terms of decreased carrier recombination.

Original language	English
Title of host publication	Organic Photonics V
Place of Publication	U. S. A.
Publisher	SPIE
ISBN (Print)	9780819491275
DOIs	https://doi.org/10.1117/12.922558
Publication status	Published - 3 May 2012
Event	Organic Photonics V - Brussels, Belgium Duration: 16 Apr 2012 → 18 Apr 2012

Publication series

Name	Proceedings of SPIE - The International Society for Optical Engineering
Volume	8435
ISSN (Print)	0277-786X

Conference

Conference	Organic Photonics V
Country/Territory	Belgium
City	Brussels
Period	16/04/12 → 18/04/12

Keywords

charge carrier mobility
low bandgap polymer
molecular doping
photovoltaics
polymer solar cells
recombination

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Computer Science Applications
Applied Mathematics
Electrical and Electronic Engineering

Access to Document

10.1117/12.922558

Cite this

Improving the photocurrent in low bandgap polymer: Fullerene solar cells with molecular doping. / De Sio, Antonietta; Tunc, Ali Veysel; Parisi, Jürgen et al.
Organic Photonics V. U. S. A.: SPIE, 2012. 84350E (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 8435).

Research output: Chapter or section in a book/report/conference proceeding › Chapter in a published conference proceeding

De Sio, A, Tunc, AV, Parisi, J, Da Como, E & Von Hauff, E 2012, Improving the photocurrent in low bandgap polymer: Fullerene solar cells with molecular doping. in Organic Photonics V., 84350E, Proceedings of SPIE - The International Society for Optical Engineering, vol. 8435, SPIE, U. S. A., Organic Photonics V, Brussels, Belgium, 16/04/12. https://doi.org/10.1117/12.922558

@inproceedings{4e08ae01aaf74cb6b9f3aa91c4325a23,

title = "Improving the photocurrent in low bandgap polymer: Fullerene solar cells with molecular doping",

abstract = "We demonstrate a simple and novel technique to improve the power conversion efficiency of polymer:fullerene solar cells based on the low bandgap polymer poly[2,6-(4,4-bis-(2-ethylhexyl)-4H-cyclopenta[2,1-b;3,4-b′]dithiophene) -alt-4,7-(2,1,3-benzothiadiazole)] (PCPDTBT) and the soluble fullerene derivative PCBM. We dope the blend via cosolution with the electron accepting molecule tetrafluoro-tetracyanoquinodimethane (F4-TCNQ). Doping concentrations of F4-CNQ from 0 - 0.3 %, with respect to the weight of the polymer, were investigated. The dark current-voltage (IV) characteristics, the illuminated IV characteristics, the external quantum efficiency, and the hole mobility in dependence of the doping concentration were studied. We observe an increase in the photocurrent resulting in improved solar cell efficiencies, which corresponds to an increase in the hole mobility in the polymer. We explain this enhancement in the solar cell performance in terms of decreased carrier recombination.",

keywords = "charge carrier mobility, low bandgap polymer, molecular doping, photovoltaics, polymer solar cells, recombination",

author = "{De Sio}, Antonietta and Tunc, {Ali Veysel} and J{\"u}rgen Parisi and {Da Como}, Enrico and {Von Hauff}, Elizabeth",

year = "2012",

month = may,

day = "3",

doi = "10.1117/12.922558",

language = "English",

isbn = "9780819491275",

series = "Proceedings of SPIE - The International Society for Optical Engineering",

publisher = "SPIE",

booktitle = "Organic Photonics V",

address = "USA United States",

note = "Organic Photonics V ; Conference date: 16-04-2012 Through 18-04-2012",

}

TY - GEN

T1 - Improving the photocurrent in low bandgap polymer

T2 - Organic Photonics V

AU - De Sio, Antonietta

AU - Tunc, Ali Veysel

AU - Parisi, Jürgen

AU - Da Como, Enrico

AU - Von Hauff, Elizabeth

PY - 2012/5/3

Y1 - 2012/5/3

N2 - We demonstrate a simple and novel technique to improve the power conversion efficiency of polymer:fullerene solar cells based on the low bandgap polymer poly[2,6-(4,4-bis-(2-ethylhexyl)-4H-cyclopenta[2,1-b;3,4-b′]dithiophene) -alt-4,7-(2,1,3-benzothiadiazole)] (PCPDTBT) and the soluble fullerene derivative PCBM. We dope the blend via cosolution with the electron accepting molecule tetrafluoro-tetracyanoquinodimethane (F4-TCNQ). Doping concentrations of F4-CNQ from 0 - 0.3 %, with respect to the weight of the polymer, were investigated. The dark current-voltage (IV) characteristics, the illuminated IV characteristics, the external quantum efficiency, and the hole mobility in dependence of the doping concentration were studied. We observe an increase in the photocurrent resulting in improved solar cell efficiencies, which corresponds to an increase in the hole mobility in the polymer. We explain this enhancement in the solar cell performance in terms of decreased carrier recombination.

AB - We demonstrate a simple and novel technique to improve the power conversion efficiency of polymer:fullerene solar cells based on the low bandgap polymer poly[2,6-(4,4-bis-(2-ethylhexyl)-4H-cyclopenta[2,1-b;3,4-b′]dithiophene) -alt-4,7-(2,1,3-benzothiadiazole)] (PCPDTBT) and the soluble fullerene derivative PCBM. We dope the blend via cosolution with the electron accepting molecule tetrafluoro-tetracyanoquinodimethane (F4-TCNQ). Doping concentrations of F4-CNQ from 0 - 0.3 %, with respect to the weight of the polymer, were investigated. The dark current-voltage (IV) characteristics, the illuminated IV characteristics, the external quantum efficiency, and the hole mobility in dependence of the doping concentration were studied. We observe an increase in the photocurrent resulting in improved solar cell efficiencies, which corresponds to an increase in the hole mobility in the polymer. We explain this enhancement in the solar cell performance in terms of decreased carrier recombination.

KW - charge carrier mobility

KW - low bandgap polymer

KW - molecular doping

KW - photovoltaics

KW - polymer solar cells

KW - recombination

UR - http://www.scopus.com/inward/record.url?scp=84862291642&partnerID=8YFLogxK

U2 - 10.1117/12.922558

DO - 10.1117/12.922558

M3 - Chapter in a published conference proceeding

AN - SCOPUS:84862291642

SN - 9780819491275

T3 - Proceedings of SPIE - The International Society for Optical Engineering

BT - Organic Photonics V

PB - SPIE

CY - U. S. A.

Y2 - 16 April 2012 through 18 April 2012

ER -

Improving the photocurrent in low bandgap polymer: Fullerene solar cells with molecular doping

Abstract

Publication series

Conference

Keywords

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this