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@article{1365432,
author = {Knall, A.C. and Ashraf, R.S. and Nikolka, M. and Nielsen, C.B. and Purushothaman, B. and Sadhanala, A. and Hurhangee, M. and Broch, K. and Harkin, D.J. and Novák, Jiří and Neophytou, M. and Hayoz, P. and Sirringhaus, H. and McCulloch, I.},
article_location = {GERMANY},
article_number = {38},
doi = {http://dx.doi.org/10.1002/adfm.201602285},
keywords = {Semiconductors; polymers; solar cells; organic field effect transistors; UV-vis absorption; charge mobility; power conversion efficiency},
language = {eng},
issn = {1616-301X},
journal = {ADVANCED FUNCTIONAL MATERIALS},
title = {Naphthacenodithiophene Based Polymers-New Members of the Acenodithiophene Family Exhibiting High Mobility and Power Conversion Efficiency},
url = {http://onlinelibrary.wiley.com/doi/10.1002/adfm.201602285/abstract},
volume = {26},
year = {2016}
}
TY - JOUR
ID - 1365432
AU - Knall, A.C. - Ashraf, R.S. - Nikolka, M. - Nielsen, C.B. - Purushothaman, B. - Sadhanala, A. - Hurhangee, M. - Broch, K. - Harkin, D.J. - Novák, Jiří - Neophytou, M. - Hayoz, P. - Sirringhaus, H. - McCulloch, I.
PY - 2016
TI - Naphthacenodithiophene Based Polymers-New Members of the Acenodithiophene Family Exhibiting High Mobility and Power Conversion Efficiency
JF - ADVANCED FUNCTIONAL MATERIALS
VL - 26
IS - 38
SP - 6961-6969
EP - 6961-6969
PB - WILEY-V C H VERLAG GMBH
SN - 1616301X
KW - Semiconductors
KW - polymers
KW - solar cells
KW - organic field effect transistors
KW - UV-vis absorption
KW - charge mobility
KW - power conversion efficiency
UR - http://onlinelibrary.wiley.com/doi/10.1002/adfm.201602285/abstract
L2 - http://onlinelibrary.wiley.com/doi/10.1002/adfm.201602285/abstract
N2 - Wide-bandgap conjugated polymers with a linear naphthacenodithiophene (NDT) donor unit are herein reported along with their performance in both transistor and solar cell devices. The monomer is synthesized starting from 2,6-dihydroxynaphthalene with a double Fries rearrangement as the key step. By copolymerization with 2,1,3-benzothiadiazole (BT) via a palladium-catalyzed Suzuki coupling reaction, NDT-BT co-polymers with high molecular weights and narrow polydispersities are afforded. These novel wide-bandgap polymers are evaluated as the semiconducting polymer in both organic field effect transistor and organic photovoltaic applications. The synthesized polymers reveal an optical bandgap in the range of 1.8 eV with an electron affinity of 3.6 eV which provides sufficient energy offset for electron transfer to PC70BM acceptors. In organic field effect transistors, the synthesized polymers demonstrate high hole mobilities of around 0.4 cm(2) V-1 s(-1). By using a blend of NDT-BT with PC70BM as absorber layer in organic bulk heterojunction solar cells, power conversion efficiencies of 7.5% are obtained. This value is among the highest obtained for polymers with a wider bandgap (larger than 1.7 eV), making this polymer also interesting for application in tandem or multijunction solar cells.
ER -
KNALL, A.C., R.S. ASHRAF, M. NIKOLKA, C.B. NIELSEN, B. PURUSHOTHAMAN, A. SADHANALA, M. HURHANGEE, K. BROCH, D.J. HARKIN, Jiří NOVÁK, M. NEOPHYTOU, P. HAYOZ, H. SIRRINGHAUS a I. MCCULLOCH. Naphthacenodithiophene Based Polymers-New Members of the Acenodithiophene Family Exhibiting High Mobility and Power Conversion Efficiency. \textit{ADVANCED FUNCTIONAL MATERIALS}. GERMANY: WILEY-V C H VERLAG GMBH, roč.~26, č.~38, s.~6961-6969. ISSN~1616-301X. doi:10.1002/adfm.201602285. 2016.
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