Opto-electronics of PbS quantum dot and narrow bandgap polymer blends

Journal article
(Original article)

Publication Details

Author(s): Kahmann S, Mura A, Protesescu L, Kovalenko MV, Brabec C, Loi MA
Journal: Journal of Materials Chemistry C
Publisher: Royal Society of Chemistry
Publication year: 2015
Volume: 3
Journal issue: 21
Pages range: 5499-5505
ISSN: 2050-7526


Here we report on the interaction between the narrow bandgap polymer [2,6-(4,4-bis(2-ethylhexyl)-4H-cyclopenta-[2,1-b;3,4-b]dithiophene)-alt-4,7-(2,1,3-benzothiadiazole)] (PCPDTBT) and lead sulphide (PbS) colloidal quantum dots (CQDs) upon photoexcitation. We show that the presence of both materials in a blend leads to a significant reduction of photoluminescence (PL) lifetime of the polymer. This observation is attributed, supported by transient absorption (TA) data, to an efficient electron transfer towards the QDs for excitons generated on the polymer. Furthermore, the ligand capping the QD surface exhibits a great impact on the dynamics of the PL, with the long-chain oleic acid (OA) largely suppressing any kind of interaction. By means of external quantum efficiency (EQE) measurements we find evidence that both components give rise to a contribution to the photocurrent, making this an interesting blend for future applications in hybrid organic-inorganic solar cells.

FAU Authors / FAU Editors

Brabec, Christoph Prof. Dr.
Institute Materials for Electronics and Energy Technology (i-MEET)

Additional Organisation
Graduiertenkolleg 1896/2 In situ Mikroskopie mit Elektronen, Röntgenstrahlen und Rastersonden
Interdisziplinäres Zentrum, Center for Nanoanalysis and Electron Microscopy (CENEM)

External institutions with authors

Eidgenössische Technische Hochschule Zürich (ETHZ) / Swiss Federal Institute of Technology in Zurich
University of Groningen / Rijksuniversiteit Groningen

How to cite

Kahmann, S., Mura, A., Protesescu, L., Kovalenko, M.V., Brabec, C., & Loi, M.A. (2015). Opto-electronics of PbS quantum dot and narrow bandgap polymer blends. Journal of Materials Chemistry C, 3(21), 5499-5505. https://dx.doi.org/10.1039/c5tc00754b

Kahmann, Simon, et al. "Opto-electronics of PbS quantum dot and narrow bandgap polymer blends." Journal of Materials Chemistry C 3.21 (2015): 5499-5505.


Last updated on 2019-03-06 at 16:45