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| 2. |
- Davis, Robert J, et al.
(författare)
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Determination of energy level alignment at interfaces of hybrid and organic solar cells under ambient environment
- 2011
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Ingår i: JOURNAL OF MATERIALS CHEMISTRY. - : Royal Society of Chemistry. - 0959-9428. ; 21:6, s. 1721-1729
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Tidskriftsartikel (refereegranskat)abstract
- Device function in organic electronics is critically governed by the transport of charge across interfaces of dissimilar materials. Accurate measurements of energy level positions in organic electronic devices are therefore necessary for assessing the viability of new materials and optimizing device performance. In contrast to established methods that are used in solution or vacuum environments, here we combine Kelvin probe measurements performed in ambient environments to obtain work function values with photoelectron spectroscopy in air to obtain ionization potential, so that a complete energy level diagram for organic semiconductors can be determined. We apply this new approach to study commonly used electron donor and acceptor materials in organic photovoltaics (OPV), including poly(3-hexylthiophene) (P3HT), [6,6]-phenyl C61 butyric acid methyl ester (PCBM), and ZnO, as well as examine new materials. Band alignments across the entire OPV devices are constructed and compared with actual device performance. The ability to determine interfacial electronic properties in the devices enables us to answer the outstanding question: why previous attempts to make OPV devices using 6,13-bis(triisopropylsilylethynyl) (TIPS)-pentacene as the electron donor were not successful.
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| 3. |
- Fast, Karin, 1979-, et al.
(författare)
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Introducing geomedia studies
- 2017
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Ingår i: Geomedia Studies. - : Routledge. - 9781138221529 - 9781315410210 ; , s. 1-18
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Bokkapitel (refereegranskat)
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| 4. |
- Fast, Karin, 1979-, et al.
(författare)
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Introducing Geomedia Studies
- 2018
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Ingår i: Geomedia Studies. - London : Routledge. - 9781138221529
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Bokkapitel (övrigt vetenskapligt/konstnärligt)
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| 5. |
- Gadisa, Abay, et al.
(författare)
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Transparent polymer cathode for organic photovoltaic devices
- 2006
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Ingår i: Synthetic metals. - : Elsevier BV. - 0379-6779 .- 1879-3290. ; 156:16-17, s. 1102-1107
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Tidskriftsartikel (refereegranskat)abstract
- We demonstrate a prototype solar cell with a transparent polymer cathode, and indium-tin-oxide (ITO)/poly (3, 4-ethylene dioxythiophene)-poly (styrene sulphonate) (PEDOT:PSS) anode. As an active layer, thin film of a bulk heterojunction of polyfluorene copolymer poly[2,7-(9,9-dioctyl-fluorene)-alt-5,5-(4′,7′-di-2thienyl-2′,1′3′-benzothiadiazole)] (APFO-3) and an electron acceptor molecule [6] and [6]-phenyl-C61-butyric acid methyl ester (PCBM) (1:4 wt.) was sandwiched between the two transparent polymer electrodes. The cathode is another form of PEDOT formed by vapor phase polymerised PEDOT (VPP PEDOT) of conductivity 102–103 S/cm. The cathode is supported on an elastomeric substrate, and forms a conformal contact to the APFO-3/PCBM blend. Transparent solar cells are useful for building multilayer and tandem solar cells.
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| 6. |
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Geomedia Studies : Spaces and Mobilities in Mediatized Worlds
- 2018
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Samlingsverk (redaktörskap) (övrigt vetenskapligt/konstnärligt)abstract
- This book introduces and develops the concept of geomedia studies as the name of a particular subfield of communication geography. Despite the accelerating societal relevance of 'geomedia' technologies for the production of various spaces, mobilities, and power-relations, and the unquestionable emergence of a vibrant research field that deals with questions pertaining to such topics, the term geomedia studies remains surprisingly unestablished. By addressing imperative questions about the implications of geomedia technologies for organizations, social groups and individuals (e.g. businesses profiting from geo-surveillance, refugees or migrants moving across national borders, or artists claiming their rights to public space) the book also aims to contribute to ongoing academic and societal debates in our increasingly mediatized world.
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| 7. |
- Holmquist Mengelbier, Linda, et al.
(författare)
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The Iroquois homeobox proteins IRX3 and IRX5 have distinct roles in Wilms tumour development and human nephrogenesis
- 2019
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Ingår i: Journal of Pathology. - : Wiley. - 0022-3417. ; 247:1
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Tidskriftsartikel (refereegranskat)abstract
- Wilms tumour is a paediatric malignancy with features of halted kidney development. Here, we demonstrate that the Iroquois homeobox genes IRX3 and IRX5 are essential for mammalian nephrogenesis and govern the differentiation of Wilms tumour. Knock-out Irx3−/Irx5− mice showed a strongly reduced embryonic nephron formation. In human foetal kidney and Wilms tumour, IRX5 expression was already activated in early proliferative blastema, whereas IRX3 protein levels peaked at tubular differentiation. Accordingly, an orthotopic xenograft mouse model of Wilms tumour showed that IRX3−/− cells formed bulky renal tumours dominated by immature mesenchyme and active canonical WNT/β-catenin-signalling. In contrast, IRX5−/− cells displayed activation of Hippo and non-canonical WNT-signalling and generated small tumours with abundant tubulogenesis. Our findings suggest that promotion of IRX3 signalling or inhibition of IRX5 signalling could be a route towards differentiation therapy for Wilms tumour, in which WNT5A is a candidate molecule for enforced tubular maturation.
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| 8. |
- Höglund, Linda, 1972-, et al.
(författare)
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Discourse and discourse analysis
- 2020
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Ingår i: Theories and Perspectives in Business Administration. - Lund : Studentlitteratur AB. - 9789144127088
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Bokkapitel (övrigt vetenskapligt/konstnärligt)
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| 9. |
- Jakobsson, Fredrik L. E., 1974-, et al.
(författare)
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Towards all-plastic flexible light emitting diodes
- 2006
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Ingår i: Chemical Physics Letters. - : Elsevier BV. - 0009-2614 .- 1873-4448. ; 433:1-3, s. 110-114
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Tidskriftsartikel (refereegranskat)abstract
- All-plastic light emitting diodes require the design and fabrication of low work function plastic electrodes. Here, we show that the work function of poly(3,4-ethylenedioxythiophene)-polystyrenesulfonic acid (PEDOT-PSS) can be decreased from 4.8 eV to 3.9 eV by surface reaction with the strong electron-donor tetrakis(dimethylamino)ethylene (TDAE). The surface modification was characterized by photoelectron spectroscopy and optical spectroscopy. The low work function plastic electrode was used in a first prototype for all-plastic light emitting diodes.
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| 10. |
- Jonsson, Eva Lindell, 1982-
(författare)
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Biomolecular markers in head and neck cancer
- 2017
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- Head and neck cancer is a heterogeneous group of tumours, of which certain subgroups such as cancer of the mobile tongue frequently are associated with a relatively poor prognosis due to the high risk of regional failure and mortality rates that haven’t improved in a significant way over the last 3 decades, despite advancements in both diagnostics and treatment.Today we lack means to assess the biological aggressiveness of each individual tumour, which varies largely. Treatment comprises of surgery with additional radiotherapy and medical therapies in more advanced tumours.The focus in this thesis is on molecular biomarker expression in head and neck cancer and especially in association with radiotherapy. Increased knowledge paves the way to a more individualized cancer treatment aiming for better outcome and less overtreatment and sequelae.The aims of this thesis was:To map the effects of radiotherapy in both tumour and adjacent tissue for the possible markers hyaluronan, EGFR and mast cells.To investigate whether the expression of hyaluronan in the epithelium and connective tissue stroma and EGFR in the tumour correlates with the risk for developing cervical metastasis in N0 patients, and to find out whether the 3-year tumour-specific survival rates correlates with the expression of HA in the epithelium and EGFR in the tumour.To establish an animal model for radiation-induced mucositis and to use that model to examine the pattern of invading inflammatory cells.To investigate whether the expression of podoplanin in tongue cancer correlates with the risk for cervical metastasis and to determine whether the total amount of lymph vessels in the diagnostic biopsy has any impact on the clinical outcome.To investigate the differences in the metabolome of tongue cancer cell lines with different radiosensitivity.The most important findings of this thesis were:The expression of EGFR and hyaluronan hade the same pattern of expression in both tumour and adjacent tissues before radiotherapy. The expression of EGFR was increased in the epithelium of the adjacent tissue close to the tumour after radiotherapy.The intensity of the staining of hyaluronan was correlated to the 3-year survival rates in patients with tongue cancer.An experimental model for radiation-induced oral mucositis in rat was established and in this model a temporal pattern of macrophage invasion with two different subtypes of macrophages was found.There were no correlation between the expression of podoplanin in the tumour tissue and the cervical metastasis rate in patients with tongue cancer, but the younger patients were more likely to have a higher expression of podoplanin in their tumour than elder patients.Tongue cancer cell lines with different radiosensitivity respond to irradiation with different patterns of metabolic expressions.
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