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Musumeci, Chiara
Publications (7 of 7) Show all publications
Xia, Y., Musumeci, C., Bergqvist, J., Ma, W., Gao, F., Tang, Z., . . . Wang, E. (2016). Inverted all-polymer solar cells based on a quinoxaline-thiophene/naphthalene-diimide polymer blend improved by annealing. Journal of Materials Chemistry A, 4(10), 3835-3843
Open this publication in new window or tab >>Inverted all-polymer solar cells based on a quinoxaline-thiophene/naphthalene-diimide polymer blend improved by annealing
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2016 (English)In: Journal of Materials Chemistry A, ISSN 2050-7488, Vol. 4, no 10, p. 3835-3843Article in journal (Refereed) Published
Abstract [en]

We have investigated the effect of thermal annealing on the photovoltaic parameters of all-polymer solar cells based on a quinoxaline-thiophene donor polymer (TQ1) and a naphthalene diimide acceptor polymer (N2200). The annealed devices show a doubled power conversion efficiency compared to nonannealed devices, due to the higher short-circuit current (J(sc)) and fill factor (FF), but with a lower open circuit voltage (V-oc). On the basis of the morphology-mobility examination by several scanning force microscopy techniques, and by grazing-incidence wide-angle X-ray scattering, we conclude that better charge transport is achieved by higher order and better interconnected networks of the bulk heterojunction in the annealed active layers. The annealing improves charge transport and extends the conjugation length of the polymers, which do help in charge generation and meanwhile reduce recombination. Photoluminescence, electroluminescence, and light intensity dependence measurements reveal how this morphological change affects charge generation and recombination. As a result, the J(sc) and FF are significantly improved. However, the smaller band gap and the higher HOMO level of TQ1 upon annealing causes a lower V-oc. The blend of an amorphous polymer TQ1, and a semi-crystalline polymer N2200, can thus be modified by thermal annealing to double the power conversion efficiency.

Place, publisher, year, edition, pages
ROYAL SOC CHEMISTRY, 2016
National Category
Biological Sciences
Identifiers
urn:nbn:se:liu:diva-127066 (URN)10.1039/c6ta00531d (DOI)000371967000030 ()
Note

Funding Agencies|Swedish Energy Agency; Swedish Research council, NSFC [21504006, 21534003]; Knut and Alice Wallenberg Foundation through a Wallenberg scholar grant; China Scholarship Council (CSC); graduate student short-term abroad research project of Jinan University; program for the Excellent Doctoral Dissertations of Guangdong Province [ybzzxm201114]; U.S. Department of Energy [DE-AC02-05CH11231]

Available from: 2016-04-13 Created: 2016-04-13 Last updated: 2019-01-04
Kroon, R., Melianas, A., Zhuang, W., Bergqvist, J., Diaz de Zerio Mendaza, A., Steckler, T. T., . . . Andersson, M. R. (2015). Comparison of selenophene and thienothiophene incorporation into pentacyclic lactam-based conjugated polymers for organic solar cells. Polymer Chemistry, 6(42), 7402-7409
Open this publication in new window or tab >>Comparison of selenophene and thienothiophene incorporation into pentacyclic lactam-based conjugated polymers for organic solar cells
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2015 (English)In: Polymer Chemistry, ISSN 1759-9954, E-ISSN 1759-9962, Vol. 6, no 42, p. 7402-7409Article in journal (Refereed) Published
Abstract [en]

In this work, we compare the effect of incorporating selenophene versus thienothiophene spacers into pentacyclic lactam-based conjugated polymers for organic solar cells. The two cyclic lactam-based copolymers were obtained via a new synthetic method for the lactam moiety. Selenophene incorporation results in a broader and red-shifted optical absorption while retaining a deep highest occupied molecular orbital level, whereas thienothienophene incorporation results in a blue-shifted optical absorption. Additionally, grazing-incidence wide angle X-ray scattering data indicates edge- and face-on solid state order for the selenophene-based polymer as compared to the thienothiophene-based polymer, which orders predominantly edge-on with respect to the substrate. In polymer : PC71BM bulk heterojunction solar cells both materials show a similar open-circuit voltage of similar to 0.80-0.84 V, however the selenophene-based polymer displays a higher fill factor of similar to 0.70 vs. similar to 0.65. This is due to the partial face-on backbone orientation of the selenophene-based polymer, leading to a higher hole mobility, as confirmed by single-carrier diode measurements, and a concomitantly higher fill factor. Combined with improved spectral coverage of the selenophene-based polymer, as confirmed by quantum efficiency experiments, it offers a larger short-circuit current density of similar to 12 mA cm(-2). Despite the relatively low molecular weight of both materials, a very robust power conversion efficiency similar to 7% is achieved for the selenophene-based polymer, while the thienothiophene-based polymer demonstrates only a moderate maximum PCE of similar to 5.5%. Hence, the favorable effects of selenophene incorporation on the photovoltaic performance of pentacyclic lactam-based conjugated polymers are clearly demonstrated.

Place, publisher, year, edition, pages
ROYAL SOC CHEMISTRY, 2015
National Category
Biological Sciences
Identifiers
urn:nbn:se:liu:diva-122675 (URN)10.1039/c5py01245g (DOI)000363214600007 ()
Note

Funding Agencies|Chalmers Areas of Advance Materials Science, Energy and Nanoscience and Nanotechnology; Swedish Research Council; Knut and Alice Wallenberg foundation; Swedish Energy Agency; South Australian government; NSF; NIH/NIGMS via NSF [DMR-1332208]

Available from: 2015-11-16 Created: 2015-11-13 Last updated: 2017-12-01
Zeglio, E., Vagin, M., Musumeci, C., Ajjan, F., Gabrielsson, R., Trinh, X. t., . . . Inganäs, O. (2015). Conjugated Polyelectrolyte Blends for Electrochromic and Electrochemical Transistor Devices. Chemistry of Materials, 27(18), 6385-6393
Open this publication in new window or tab >>Conjugated Polyelectrolyte Blends for Electrochromic and Electrochemical Transistor Devices
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2015 (English)In: Chemistry of Materials, ISSN 0897-4756, E-ISSN 1520-5002, Vol. 27, no 18, p. 6385-6393Article in journal (Refereed) Published
Abstract [en]

Two self-doped conjugated polyelectrolytes, having semiconducting and metallic behaviors, respectively, have been blended from aqueous solutions in order to produce materials with enhanced optical and electrical properties. The intimate blend of two anionic conjugated polyelectrolytes combine the electrical and optical properties of these, and can be tuned by blend stoichiometry. In situ conductance measurements have been done during doping of the blends, while UV vis and EPR spectroelectrochemistry allowed the study of the nature of the involved redox species. We have constructed an accumulation/depletion mode organic electrochemical transistor whose characteristics can be tuned by balancing the stoichiometry of the active material.

Place, publisher, year, edition, pages
AMER CHEMICAL SOC, 2015
National Category
Materials Chemistry Condensed Matter Physics
Identifiers
urn:nbn:se:liu:diva-122212 (URN)10.1021/acs.chemmater.5b02501 (DOI)000361935000028 ()
Note

Funding Agencies|Marie Curie network "Renaissance"; Knut and Alice Wallenberg foundation through Wallenberg Scholar grant; Swedish Research Council [VR-2014-3079, D0556101]; Carl Trygger Foundation [CTS 12:206]

Available from: 2015-10-26 Created: 2015-10-23 Last updated: 2017-12-01
Johansson, P., Jullesson, D., Elfwing, A., Liin, S., Musumeci, C., Zeglio, E., . . . Inganäs, O. (2015). Electronic polymers in lipid membranes. Scientific Reports, 5(11242)
Open this publication in new window or tab >>Electronic polymers in lipid membranes
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2015 (English)In: Scientific Reports, ISSN 2045-2322, E-ISSN 2045-2322, Vol. 5, no 11242Article in journal (Refereed) Published
Abstract [en]

Electrical interfaces between biological cells and man-made electrical devices exist in many forms, but it remains a challenge to bridge the different mechanical and chemical environments of electronic conductors (metals, semiconductors) and biosystems. Here we demonstrate soft electrical interfaces, by integrating the metallic polymer PEDOT-S into lipid membranes. By preparing complexes between alkyl-ammonium salts and PEDOT-S we were able to integrate PEDOT-S into both liposomes and in lipid bilayers on solid surfaces. This is a step towards efficient electronic conduction within lipid membranes. We also demonstrate that the PEDOT-S@alkyl-ammonium: lipid hybrid structures created in this work affect ion channels in the membrane of Xenopus oocytes, which shows the possibility to access and control cell membrane structures with conductive polyelectrolytes.

Place, publisher, year, edition, pages
Nature Publishing Group, 2015
National Category
Biophysics
Identifiers
urn:nbn:se:liu:diva-120045 (URN)10.1038/srep11242 (DOI)000356090400002 ()26059023 (PubMedID)
Note

Funding Agencies|Knut and Alice Wallenberg Foundation; Swedish Research Council

Available from: 2015-07-06 Created: 2015-07-06 Last updated: 2018-01-25
Ouyang, L., Musumeci, C., Jafari, M. J., Ederth, T. & Inganäs, O. (2015). Imaging the Phase Separation Between PEDOT and Polyelectrolytes During Processing of Highly Conductive PEDOT:PSS Films. ACS Applied Materials and Interfaces, 7(35), 19764-19773
Open this publication in new window or tab >>Imaging the Phase Separation Between PEDOT and Polyelectrolytes During Processing of Highly Conductive PEDOT:PSS Films
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2015 (English)In: ACS Applied Materials and Interfaces, ISSN 1944-8244, E-ISSN 1944-8252, Vol. 7, no 35, p. 19764-19773Article in journal (Refereed) Published
Abstract [en]

Treating PEDOT:PSS (Clevios) with certain additives, such as ethylene glycol (EG), dimethyl sulfoxide (DMSO) and sorbitol, has been shown to increase the conductivity of this material from roughly 1 to nearly 1000 S/cm. Using a slow drying method, we show that the additive induced a separation between free PSS and reorganized PEDOT:PSS complexes in the highly conductive PEDOT:PSS films. Additives (DMSO, DEG, and PEG 400) were included in PEDOT:PSS aqueous dispersions at large volume fractions. The mixtures were slowly dried under room conditions. During drying, the evaporation of water resulted in an additive-rich solvent mixture from which the reorganized PEDOT:PSS complexes aggregated " into a dense film while free PSS remained in the solution. Upon complete drying, PSS formed a transparent rim film around the conducting PEDOT film. The chemical compositions of the two phases were studied using an infrared microscope. This removal of PSS resulted in more compact packing of PEDOT molecules, as confirmed by X-ray diffraction measurements. X-ray photoelectron spectroscopy and atomic force microscope measurements suggested the enrichment of PEDOT on the film surface after PSS separation. Through a simple drying process in an additive-containing dispersion, the conductivity of PEDOT films increased from 0.1 to 200-400 S/cm. Through this method, we confirmed the existence of two phases in additive-treated and highly conductive PEDOT:PSS films. The proper separation between PSS and PEDOT will be of relevance in designing strategies to process high-performance plastic electrodes.

Place, publisher, year, edition, pages
AMER CHEMICAL SOC, 2015
Keywords
PEDOT:PSS; solvent treatment; additives; conductivity enhancement; organic electronics
National Category
Materials Chemistry Inorganic Chemistry
Identifiers
urn:nbn:se:liu:diva-121897 (URN)10.1021/acsami.5b05439 (DOI)000361252400030 ()26290062 (PubMedID)
Note

Funding Agencies|Swedish Strategic Research Foundation (SSF) through the project SiOS; Knut and Alice Wallenberg Foundation

Available from: 2015-10-13 Created: 2015-10-12 Last updated: 2017-12-01
Elfwing, A., Bäcklund, F., Musumeci, C., Inganäs, O. & Solin, N. (2015). Protein nanowires with conductive properties. Journal of Materials Chemistry C, 3(25), 6499-6504
Open this publication in new window or tab >>Protein nanowires with conductive properties
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2015 (English)In: Journal of Materials Chemistry C, ISSN 2050-7526, E-ISSN 2050-7534, Vol. 3, no 25, p. 6499-6504Article in journal (Refereed) Published
Abstract [en]

Herein we report on the investigation of self-assembled protein nanofibrils functionalized with metallic organic compounds. We have characterized the electronic behaviour of individual nanowires using conductive atomic force microscopy. In order to follow the self assembly process we have incorporated fluorescent molecules into the protein and used the energy transfer between the internalized dye and the metallic coating to probe the binding of the polyelectrolyte to the fibril.

Place, publisher, year, edition, pages
Royal Society of Chemistry, 2015
National Category
Biological Sciences
Identifiers
urn:nbn:se:liu:diva-120179 (URN)10.1039/c5tc00896d (DOI)000356529100010 ()
Note

Funding Agencies|Knut and Alice Wallenberg Foundation through a Wallenberg Scholar grant

Available from: 2015-07-13 Created: 2015-07-13 Last updated: 2017-12-04
Bergqvist, J., Melianas, A., Andersson, O., Lindqvist, C., Musumeci, C. & Inganäs, O. (2015). Time-resolved morphology formation of solution cast polymer: fullerene blends revealed by in-situ photoluminescence spectroscopy.
Open this publication in new window or tab >>Time-resolved morphology formation of solution cast polymer: fullerene blends revealed by in-situ photoluminescence spectroscopy
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2015 (English)Manuscript (preprint) (Other academic)
Abstract [en]

The nanoscale morphology of the photo-active layer in organic solar cells is critical for device efficiency. The photoactive layer is cast from solution and during drying both the polymer and the fullerene self-assemble to form a blend. Here, we introduce in-situ spectroscopic photoluminescence (PL) combined with laser reflectometry to monitor the drying process of an amorphous polymer:fullerene blend. When casting only the pristine components (polymer or PCBM only), the strength of PL emission is proportional to the solid content of the drying solution, and both kinetics reveal a rapid aggregation onset at the final stage of film drying. On the contrary, when casting polymer:fullerene blends, the strength of PL emission is proportional to the wet film thickness and reveals polymer/fullerene charge transfer (CT) already at the earliest stages of film drying, i.e. in dilute solutions. The proposed method allows to detect polymer/fullerene phase separation during film casting – from a reduction in the PL quenching rate as the film dries. Poor solvents lead to phase separation already at early stages of film drying (low solid content), resulting in a coarse final morphology as confirmed by atomic force microscopy (AFM). We therefore anticipate that the proposed method will be an important tool in the future development of processing inks, not only for solution-cast polymer:fullerene solar cells but also for organic heterojunctions in general.

National Category
Physical Sciences Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:liu:diva-123032 (URN)
Available from: 2015-12-02 Created: 2015-12-02 Last updated: 2015-12-03
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