A benzothiadiazole-based oligothiophene for vacuum-deposited organic photovoltaic cells

Jin Ah Kong, Eunhee Lim, Kyeong K. Lee, Sungkoo Lee, Sung Hyun Kim

Research output: Contribution to journalArticle

35 Citations (Scopus)

Abstract

We introduced a benzothiadiazole unit into a small molecule conjugated system and determined the electronic features and organic photovoltaic cell (OPV) characteristics of the resulting material, 4,7-bis(5′-hexyl-2, 2′-bithiophene-5-yl)benzothiadiazole (DH5TB). DH5TB showed remarkably red-shifted UVvis absorption and photoluminescence (PL) emission spectra compared with α,α′-dihexyl-quinquethiophene (DH5T). The low energy band gap of 1.95 eV and good film morphology of DH5TB resulted in good OPV performance. We investigated the DH5TB:C60 blend ratio dependence on OPV performance and further improved the efficiency by introducing a C 60 interlayer on top of the DH5TB:C60 layer. In the present work, the best photovoltaic cells had a JSC of 4.75 mA/cm2, a VOC of 0.53 V, and a fill factor (FF) of 0.38, giving a power conversion efficiency of 0.97% under AM 1.5 (100 m/cm 2) without thermal annealing.

Original languageEnglish
Pages (from-to)2057-2063
Number of pages7
JournalSolar Energy Materials and Solar Cells
Volume94
Issue number12
DOIs
Publication statusPublished - 2010 Dec 1

Fingerprint

Photovoltaic cells
Vacuum
Volatile organic compounds
Band structure
Conversion efficiency
Photoluminescence
Energy gap
Annealing
Molecules
benzo-1,2,3-thiadiazole

Keywords

  • Benzothiadiazole
  • Low band gap
  • Oligothiophene
  • Organic photovoltaic cells
  • Solar cells

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Electronic, Optical and Magnetic Materials
  • Surfaces, Coatings and Films

Cite this

A benzothiadiazole-based oligothiophene for vacuum-deposited organic photovoltaic cells. / Ah Kong, Jin; Lim, Eunhee; Lee, Kyeong K.; Lee, Sungkoo; Kim, Sung Hyun.

In: Solar Energy Materials and Solar Cells, Vol. 94, No. 12, 01.12.2010, p. 2057-2063.

Research output: Contribution to journalArticle

Ah Kong, Jin ; Lim, Eunhee ; Lee, Kyeong K. ; Lee, Sungkoo ; Kim, Sung Hyun. / A benzothiadiazole-based oligothiophene for vacuum-deposited organic photovoltaic cells. In: Solar Energy Materials and Solar Cells. 2010 ; Vol. 94, No. 12. pp. 2057-2063.
@article{d412cf92746849babd240af4f536944f,
title = "A benzothiadiazole-based oligothiophene for vacuum-deposited organic photovoltaic cells",
abstract = "We introduced a benzothiadiazole unit into a small molecule conjugated system and determined the electronic features and organic photovoltaic cell (OPV) characteristics of the resulting material, 4,7-bis(5′-hexyl-2, 2′-bithiophene-5-yl)benzothiadiazole (DH5TB). DH5TB showed remarkably red-shifted UVvis absorption and photoluminescence (PL) emission spectra compared with α,α′-dihexyl-quinquethiophene (DH5T). The low energy band gap of 1.95 eV and good film morphology of DH5TB resulted in good OPV performance. We investigated the DH5TB:C60 blend ratio dependence on OPV performance and further improved the efficiency by introducing a C 60 interlayer on top of the DH5TB:C60 layer. In the present work, the best photovoltaic cells had a JSC of 4.75 mA/cm2, a VOC of 0.53 V, and a fill factor (FF) of 0.38, giving a power conversion efficiency of 0.97{\%} under AM 1.5 (100 m/cm 2) without thermal annealing.",
keywords = "Benzothiadiazole, Low band gap, Oligothiophene, Organic photovoltaic cells, Solar cells",
author = "{Ah Kong}, Jin and Eunhee Lim and Lee, {Kyeong K.} and Sungkoo Lee and Kim, {Sung Hyun}",
year = "2010",
month = "12",
day = "1",
doi = "10.1016/j.solmat.2010.06.016",
language = "English",
volume = "94",
pages = "2057--2063",
journal = "Solar Energy Materials and Solar Cells",
issn = "0927-0248",
publisher = "Elsevier",
number = "12",

}

TY - JOUR

T1 - A benzothiadiazole-based oligothiophene for vacuum-deposited organic photovoltaic cells

AU - Ah Kong, Jin

AU - Lim, Eunhee

AU - Lee, Kyeong K.

AU - Lee, Sungkoo

AU - Kim, Sung Hyun

PY - 2010/12/1

Y1 - 2010/12/1

N2 - We introduced a benzothiadiazole unit into a small molecule conjugated system and determined the electronic features and organic photovoltaic cell (OPV) characteristics of the resulting material, 4,7-bis(5′-hexyl-2, 2′-bithiophene-5-yl)benzothiadiazole (DH5TB). DH5TB showed remarkably red-shifted UVvis absorption and photoluminescence (PL) emission spectra compared with α,α′-dihexyl-quinquethiophene (DH5T). The low energy band gap of 1.95 eV and good film morphology of DH5TB resulted in good OPV performance. We investigated the DH5TB:C60 blend ratio dependence on OPV performance and further improved the efficiency by introducing a C 60 interlayer on top of the DH5TB:C60 layer. In the present work, the best photovoltaic cells had a JSC of 4.75 mA/cm2, a VOC of 0.53 V, and a fill factor (FF) of 0.38, giving a power conversion efficiency of 0.97% under AM 1.5 (100 m/cm 2) without thermal annealing.

AB - We introduced a benzothiadiazole unit into a small molecule conjugated system and determined the electronic features and organic photovoltaic cell (OPV) characteristics of the resulting material, 4,7-bis(5′-hexyl-2, 2′-bithiophene-5-yl)benzothiadiazole (DH5TB). DH5TB showed remarkably red-shifted UVvis absorption and photoluminescence (PL) emission spectra compared with α,α′-dihexyl-quinquethiophene (DH5T). The low energy band gap of 1.95 eV and good film morphology of DH5TB resulted in good OPV performance. We investigated the DH5TB:C60 blend ratio dependence on OPV performance and further improved the efficiency by introducing a C 60 interlayer on top of the DH5TB:C60 layer. In the present work, the best photovoltaic cells had a JSC of 4.75 mA/cm2, a VOC of 0.53 V, and a fill factor (FF) of 0.38, giving a power conversion efficiency of 0.97% under AM 1.5 (100 m/cm 2) without thermal annealing.

KW - Benzothiadiazole

KW - Low band gap

KW - Oligothiophene

KW - Organic photovoltaic cells

KW - Solar cells

UR - http://www.scopus.com/inward/record.url?scp=77957663930&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=77957663930&partnerID=8YFLogxK

U2 - 10.1016/j.solmat.2010.06.016

DO - 10.1016/j.solmat.2010.06.016

M3 - Article

AN - SCOPUS:77957663930

VL - 94

SP - 2057

EP - 2063

JO - Solar Energy Materials and Solar Cells

JF - Solar Energy Materials and Solar Cells

SN - 0927-0248

IS - 12

ER -