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 language | English |
|---|---|
| Pages (from-to) | 2057-2063 |
| Number of pages | 7 |
| Journal | Solar Energy Materials and Solar Cells |
| Volume | 94 |
| Issue number | 12 |
| DOIs | |
| Publication status | Published - 2010 Dec 1 |
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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 journal › Article
}
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 -