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Comparison of the electron work function, hole concentration and exciton diffusion length for P3HT and PT prepared by thermal or acid cleavage
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SYSNO ASEP 0452185 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Comparison of the electron work function, hole concentration and exciton diffusion length for P3HT and PT prepared by thermal or acid cleavage Tvůrce(i) Toušek, J. (CZ)
Toušková, J. (CZ)
Ludvík, Jiří (UFCH-W) RID, ORCID
Liška, Alan (UFCH-W) RID, ORCID
Remeš, Zdeněk (FZU-D) RID, ORCID
Kylián, O. (CZ)
Kousal, J. (CZ)
Chomutová, R. (CZ)
Heckler, I. M. (DK)
Bundgaard, C. (DK)
Krebs, F.C. (DK)Zdroj.dok. Solid-State Electronics. - : Elsevier - ISSN 0038-1101
Roč. 116, FEB 2016 (2016), s. 111-118Poč.str. 8 s. Jazyk dok. eng - angličtina Země vyd. GB - Velká Británie Klíč. slova polythiophene ; hole concentration ; energy level diagram Vědní obor RIV CG - Elektrochemie Vědní obor RIV – spolupráce Fyzikální ústav - Fyzika pevných látek a magnetismus CEP GA14-05053S GA ČR - Grantová agentura ČR Institucionální podpora UFCH-W - RVO:61388955 ; FZU-D - RVO:68378271 UT WOS 000367542100020 EID SCOPUS 84947606063 DOI 10.1016/j.sse.2015.11.002 Anotace The electron work function, hole concentration and diffusion length were compared for poly(3-hexylthiophene) polymer (P3HT) that is commonly used for construction of solar cells, and two types of native polythiophene (PT) samples which are prospective candidates for this purpose. The polythiophene samples were prepared from 2 different precursors by thermal or chemical treatment at room temperature. Cyclic voltammetry and work function measurements were used for estimating the concentration of holes. The measured data were evaluated assuming the validity of band theory based on the tight-binding model. Published data on the valence bandwidth were used for calculating the value of the overlap integral which is related to the hole effective mass. Energy band diagrams were constructed for all 3 materials. Finally, the exciton diffusion length, which is a critical parameter for the application of conjugated polymer materials in solar cells, was measured by a modified surface photovoltage method. The approach allowed us to identify the differences in the material properties related to the processing method. Morphology of the samples determined by AFM was another tool showing these differences. It is stated that a native polythiophene prepared by treatment with acids is a prospective material for solar cells and shows a similar quality as that produced by a thermal process. Pracoviště Ústav fyzikální chemie J.Heyrovského Kontakt Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Rok sběru 2017
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