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Abstract
In this communication, we investigate the direct and still conjugated intramolecular +N[double bond, length as m-dash]B− interactions in novel high band gap borylated carbazole containing polymers, namely, poly(3,6-(N-di(2,4,6-trimethyl)phenylboryl-carbazole)-alt-4,8-di(5-(2-ethylhexyl)thiophene-2-yl)benzo[1,2-b:4,5-b′]dithiophene) (P(3,6-BCBDT)) and poly(3,6-(N-di(2,4,6-trimethyl)phenylboryl-carbazole)-alt-3,3′′′-didodecyl-2,2′:5′,2′′:5′′,2′′′-quaterthiophene) (P(3,6-BCQT)), which result in ambipolarity, high electron affinity, and deep HOMO levels. The quasi-donor–acceptor nature of the two polymers was confirmed by UV-Vis absorption, electro-chemical property studies, and computer modelling. Band gaps of 2.07 eV for P(3,6-BCBDT) and 2.23 eV for P(3,6-BCQT) were obtained. P(3,6-BCQT) afforded a power conversion efficiency of 1.44%, with a Jsc of 4.82 mA cm−2, a Voc of 0.79 V and a FF of 37%, and P(3,6-BCBDT) performed better with an efficiency of 3.82%, with a Jsc of 8.31 mA cm−2, a Voc of 1.0 V based on its low lying HOMO level, and a FF of 45%.
Originalsprog | Engelsk |
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Tidsskrift | Journal of Materials Chemistry C |
Vol/bind | 4 |
Udgave nummer | 20 |
Sider (fra-til) | 4393-4401 |
Antal sider | 9 |
ISSN | 2050-7526 |
DOI | |
Status | Udgivet - 27 apr. 2016 |
Fingeraftryk
Dyk ned i forskningsemnerne om 'Novel high band gap pendant-borylated carbazole polymers with deep HOMO levels through direct +N=B− interaction for organic photovoltaics'. Sammen danner de et unikt fingeraftryk.Projekter
- 1 Afsluttet
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Organic based photovoltaic cells with morphology control - Extension
Yue, W., Yu, D. & Krebs, F. C.
01/10/2013 → 30/09/2016
Projekter: Projekt › Forskning