Abstract
Three extended 2,5-dithienylthiazolo[5,4-d]thiazole-based small molecule chromophores are prepared via a sustainable direct arylation approach and their physicochemical and opto-electrical material characteristics are analyzed toward integration in solution-processed bulk heterojunction organic photovoltaics. Efficient charge separation and high values of the charge transfer state energy are derived from sensitive ground and excited state absorption and photoluminescence measurements on blends of the thiazolo[5,4-d]thiazole-based electron donor components with the PC71BM fullerene acceptor. Upon implementation in organic solar cells, a maximum power conversion efficiency of 2.7% and particularly high open-circuit voltages (0.93−0.98 V) are observed, which are correlated to the charge transfer state energies as derived from photoluminescence, Fourier transform photocurrent spectroscopy and combined electrochemical and photophysical data. Furthermore, several loss processes at the origin of the modest short-circuit current densities and fill factors are elucidated.
| Original language | English |
|---|---|
| Pages (from-to) | 1253-1261 |
| Number of pages | 9 |
| Journal | ChemistrySelect |
| Volume | 2 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - 1 Jan 2017 |
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Keywords
- charge transfer
- direct arylation
- donor-acceptor systems
- organic photovoltaics
- organic semiconductors
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Designing small molecule organic solar cells with high open-circuit voltage. / Kudrjasova, Julija; Van Landeghem, Melissa; Vangerven, Tim; Kesters, Jurgen; Heintges, Gaël H.L.; Cardinaletti, Ilaria; Lenaerts, Ruben; Penxten, Huguette; Adriaensens, Peter; Lutsen, Laurence; Vanderzande, Dirk; Manca, Jean; Goovaerts, Etienne; Maes, Wouter.
In: ChemistrySelect, Vol. 2, No. 3, 01.01.2017, p. 1253-1261.Research output: Contribution to journal › Article › Academic › peer-review
TY - JOUR
T1 - Designing small molecule organic solar cells with high open-circuit voltage
AU - Kudrjasova, Julija
AU - Van Landeghem, Melissa
AU - Vangerven, Tim
AU - Kesters, Jurgen
AU - Heintges, Gaël H.L.
AU - Cardinaletti, Ilaria
AU - Lenaerts, Ruben
AU - Penxten, Huguette
AU - Adriaensens, Peter
AU - Lutsen, Laurence
AU - Vanderzande, Dirk
AU - Manca, Jean
AU - Goovaerts, Etienne
AU - Maes, Wouter
PY - 2017/1/1
Y1 - 2017/1/1
N2 - Three extended 2,5-dithienylthiazolo[5,4-d]thiazole-based small molecule chromophores are prepared via a sustainable direct arylation approach and their physicochemical and opto-electrical material characteristics are analyzed toward integration in solution-processed bulk heterojunction organic photovoltaics. Efficient charge separation and high values of the charge transfer state energy are derived from sensitive ground and excited state absorption and photoluminescence measurements on blends of the thiazolo[5,4-d]thiazole-based electron donor components with the PC71BM fullerene acceptor. Upon implementation in organic solar cells, a maximum power conversion efficiency of 2.7% and particularly high open-circuit voltages (0.93−0.98 V) are observed, which are correlated to the charge transfer state energies as derived from photoluminescence, Fourier transform photocurrent spectroscopy and combined electrochemical and photophysical data. Furthermore, several loss processes at the origin of the modest short-circuit current densities and fill factors are elucidated.
AB - Three extended 2,5-dithienylthiazolo[5,4-d]thiazole-based small molecule chromophores are prepared via a sustainable direct arylation approach and their physicochemical and opto-electrical material characteristics are analyzed toward integration in solution-processed bulk heterojunction organic photovoltaics. Efficient charge separation and high values of the charge transfer state energy are derived from sensitive ground and excited state absorption and photoluminescence measurements on blends of the thiazolo[5,4-d]thiazole-based electron donor components with the PC71BM fullerene acceptor. Upon implementation in organic solar cells, a maximum power conversion efficiency of 2.7% and particularly high open-circuit voltages (0.93−0.98 V) are observed, which are correlated to the charge transfer state energies as derived from photoluminescence, Fourier transform photocurrent spectroscopy and combined electrochemical and photophysical data. Furthermore, several loss processes at the origin of the modest short-circuit current densities and fill factors are elucidated.
KW - charge transfer
KW - direct arylation
KW - donor-acceptor systems
KW - organic photovoltaics
KW - organic semiconductors
UR - http://www.scopus.com/inward/record.url?scp=85040723337&partnerID=8YFLogxK
U2 - 10.1002/slct.201601915
DO - 10.1002/slct.201601915
M3 - Article
AN - SCOPUS:85040723337
VL - 2
SP - 1253
EP - 1261
JO - ChemistrySelect
JF - ChemistrySelect
SN - 2365-6549
IS - 3
ER -