High open circuit voltage polymer solar cells enabled by employing thiazoles in semiconducting polymers

C. Duan, J.J. van Franeker, M.M. Wienk, R.A.J. Janssen

Onderzoeksoutput: Bijdrage aan tijdschriftTijdschriftartikelAcademicpeer review

15 Citaties (Scopus)

Uittreksel

We investigate the effect of introducing thiazole π-spacers in wide bandgap semiconducting copolymers based on benzothiadiazole with either benzodithiophene or indacenodithiophene. Thiazole-containing polymers show similar optical bandgaps but drastically downshifted frontier orbital levels compared to the corresponding thiophene derivatives as a result of the more electronegative imine nitrogen. Consequently, they provide an enhanced open-circuit voltage (Voc) of about 0.2 V in bulk heterojunction polymer solar cells. Notably, the Voc approaches 0.95 V for polymers with an optical bandgap below 1.75 eV. Despite the favourable energetics, the performance of the thiazole-containing polymers in solar cells is currently restricted by the relatively low molecular weight, which results in a sub-optimal bulk heterojunction morphology.

TaalEngels
Pagina's5730-5738
Aantal pagina's9
TijdschriftPolymer Chemistry
Volume7
Nummer van het tijdschrift36
DOI's
StatusGepubliceerd - 28 sep 2016

Vingerafdruk

Semiconducting polymers
Thiazoles
Open circuit voltage
Polymers
Optical band gaps
Heterojunctions
Thiophenes
Imines
Thiophene
Solar cells
Energy gap
Nitrogen
Copolymers
Molecular weight
Derivatives
Molecular Weight
Polymer solar cells

Citeer dit

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title = "High open circuit voltage polymer solar cells enabled by employing thiazoles in semiconducting polymers",
abstract = "We investigate the effect of introducing thiazole π-spacers in wide bandgap semiconducting copolymers based on benzothiadiazole with either benzodithiophene or indacenodithiophene. Thiazole-containing polymers show similar optical bandgaps but drastically downshifted frontier orbital levels compared to the corresponding thiophene derivatives as a result of the more electronegative imine nitrogen. Consequently, they provide an enhanced open-circuit voltage (Voc) of about 0.2 V in bulk heterojunction polymer solar cells. Notably, the Voc approaches 0.95 V for polymers with an optical bandgap below 1.75 eV. Despite the favourable energetics, the performance of the thiazole-containing polymers in solar cells is currently restricted by the relatively low molecular weight, which results in a sub-optimal bulk heterojunction morphology.",
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High open circuit voltage polymer solar cells enabled by employing thiazoles in semiconducting polymers. / Duan, C.; van Franeker, J.J.; Wienk, M.M.; Janssen, R.A.J.

In: Polymer Chemistry, Vol. 7, Nr. 36, 28.09.2016, blz. 5730-5738.

Onderzoeksoutput: Bijdrage aan tijdschriftTijdschriftartikelAcademicpeer review

TY - JOUR

T1 - High open circuit voltage polymer solar cells enabled by employing thiazoles in semiconducting polymers

AU - Duan,C.

AU - van Franeker,J.J.

AU - Wienk,M.M.

AU - Janssen,R.A.J.

PY - 2016/9/28

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AB - We investigate the effect of introducing thiazole π-spacers in wide bandgap semiconducting copolymers based on benzothiadiazole with either benzodithiophene or indacenodithiophene. Thiazole-containing polymers show similar optical bandgaps but drastically downshifted frontier orbital levels compared to the corresponding thiophene derivatives as a result of the more electronegative imine nitrogen. Consequently, they provide an enhanced open-circuit voltage (Voc) of about 0.2 V in bulk heterojunction polymer solar cells. Notably, the Voc approaches 0.95 V for polymers with an optical bandgap below 1.75 eV. Despite the favourable energetics, the performance of the thiazole-containing polymers in solar cells is currently restricted by the relatively low molecular weight, which results in a sub-optimal bulk heterojunction morphology.

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