ORCID Profile
0000-0002-6243-1450
Current Organisations
Chalmers tekniska hogskola
,
Göteborgs Universitet
,
Linköpings universitet
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Publisher: Wiley
Date: 16-08-2005
Publisher: Elsevier BV
Date: 05-1999
Publisher: Elsevier BV
Date: 04-2003
Publisher: AIP Publishing
Date: 22-11-2004
DOI: 10.1063/1.1825070
Abstract: Plastic solar cells were fabricated using a low-band-gap alternating copolymer of fluorene and a donor–acceptor–donor moiety (APFO-Green1), blended with [6,6]-phenyl-C61-butyric acid methylester or 3′-(3,5-Bis-trifluoromethylphenyl)-1′-(4-nitrophenyl)pyrazolino[60]fullerene as electron acceptors. The polymer shows optical absorption in two wavelength ranges from 300& λ& nm and 650& λ& nm. Devices based on APFO-Green1 blended with the later fullerene exhibit an outstanding photovoltaic behavior at the infrared range, where the external quantum efficiency is as high as 8.4% at 840nm and 7% at 900nm, while the onset of photogeneration is found at 1μm. A photocurrent density of 1.76mA∕cm2, open-circuit voltage of 0.54V, and power conversion efficiency of 0.3% are achieved under the illumination of AM1.5 (1000W∕m2) from a solar simulator.
Publisher: American Chemical Society (ACS)
Date: 10-05-2010
DOI: 10.1021/NL1012008
Abstract: Red and yellow phosphorescent insulin amyloid fibrils are used as guest-emitting species within a blue-emitting polyfluorene matrix in light-emitting diodes. The integration of the phosphorescent Ir-complex into the amyloid structures strongly improves the triplet exciton confinement and allows the fabrication of white-emitting device with a very low loading of phosphorescent complex. The overall performances of the devices are improved in comparison with the corresponding bare Ir-complexes. This approach opens a way to explore novel device architectures and to understand the exciton/charge transfer dynamics in phosphorescent light emitting diodes.
Publisher: American Chemical Society (ACS)
Date: 04-01-2019
Publisher: Royal Society of Chemistry (RSC)
Date: 2013
DOI: 10.1039/C3TA13040A
Publisher: Elsevier BV
Date: 09-2005
Publisher: Elsevier BV
Date: 07-2006
Publisher: Wiley
Date: 20-11-2009
Abstract: Polymer/fullerene solar cells with three different device structures: A) diffuse bilayer, B) spontaneously formed multilayer, and C) vertically homogenous thin films, are fabricated. The photocurrent/voltage performance is compared and it is found that the self-stratified structure (B) yields the highest energy conversion efficiency.
Publisher: American Chemical Society (ACS)
Date: 22-08-2011
DOI: 10.1021/JA206610U
Abstract: A new, low-band-gap alternating copolymer consisting of terthiophene and isoindigo has been designed and synthesized. Solar cells based on this polymer and PC(71)BM show a power conversion efficiency of 6.3%, which is a record for polymer solar cells based on a polymer with an optical band gap below 1.5 eV. This work demonstrates the great potential of isoindigo moieties as electron-deficient units for building donor-acceptor-type polymers for high-performance polymer solar cells.
Publisher: Wiley
Date: 08-2000
DOI: 10.1002/1521-4095(200008)12:15<1110::AID-ADMA1110>3.0.CO;2-T
Publisher: Springer Science and Business Media LLC
Date: 2002
Publisher: Elsevier BV
Date: 04-2003
Publisher: AIP Publishing
Date: 15-07-1994
DOI: 10.1063/1.357766
Abstract: Thermochromism and optical absorption in mono- and multilayers of Langmuir–Blodgett films of poly(3-alkylthiophenes), poly(3-octyl-2,2′-bithiophene), and poly(3′-octyl-2,2′ ′,2″-terthiophene) were studied. In sparsely alkylated polythiophenes the magnitude of the thermochromic shift was smaller than in poly(3-alkylthiophenes) and roughly proportional to the sidechain concentration. Results of Valence Effective Hamiltonian calculations were compared with the experimental results of thermochromism. A vibronic structure was found in the absorption spectra of Langmuir–Blodgett films at room temperature. The vibronic splitting in poly(3-hexylthiophene) was approximately 0.18 eV as previously has been observed in poly(3-alkylthiophenes) but in poly(3′-octyl-2,2′ ′,2″-terthiophene) it was 0.20–0.25 eV. The vibronic peaks stay approximately at constant energies and vanish at elevated temperatures.
Publisher: Elsevier BV
Date: 03-1997
Publisher: Elsevier BV
Date: 07-1999
Publisher: Elsevier BV
Date: 2007
Publisher: American Chemical Society (ACS)
Date: 07-03-2011
DOI: 10.1021/MA102783D
Publisher: Elsevier BV
Date: 04-2000
Publisher: Royal Society of Chemistry (RSC)
Date: 2003
DOI: 10.1039/B301403G
Publisher: Wiley
Date: 13-09-2013
DOI: 10.1002/PI.4600
Publisher: Wiley
Date: 03-05-2002
DOI: 10.1002/1521-4095(20020503)14:9<662::AID-ADMA662>3.0.CO;2-N
Publisher: Wiley
Date: 18-11-2013
Publisher: Elsevier BV
Date: 04-2003
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 11-2010
Publisher: American Chemical Society (ACS)
Date: 13-11-2012
DOI: 10.1021/JP308480U
Publisher: Elsevier BV
Date: 06-2000
Publisher: Elsevier BV
Date: 11-2002
Publisher: American Association for the Advancement of Science (AAAS)
Date: 30-06-2000
DOI: 10.1126/SCIENCE.288.5475.2335
Abstract: Conducting polymers are excellent materials for actuators that are operated in aqueous media. Microactuators based on polypyrrole-gold bilayers enable large movement of structures attached to these actuators and are of particular interest for the manipulation of biological objects, such as single cells. A fabrication method for creating in idually addressable and controllable polypyrrole-gold microactuators was developed. With these in idually controlled microactuators, a micrometer-size manipulator, or microrobotic arm, was fabricated. This microrobotic arm can pick up, lift, move, and place micrometer-size objects within an area of about 250 micrometers by 100 micrometers, making the microrobot an excellent tool for single-cell manipulation.
Publisher: Elsevier BV
Date: 2006
Publisher: Royal Society of Chemistry (RSC)
Date: 2012
DOI: 10.1039/C1JM14940G
Publisher: Elsevier BV
Date: 08-2006
Publisher: Elsevier BV
Date: 05-1999
Publisher: Elsevier BV
Date: 05-1999
Publisher: Elsevier BV
Date: 03-2001
Publisher: Elsevier BV
Date: 03-2001
Publisher: Wiley
Date: 25-02-2013
Publisher: Wiley
Date: 20-06-2011
Publisher: Elsevier BV
Date: 03-2001
Publisher: Elsevier BV
Date: 08-2006
Publisher: American Chemical Society (ACS)
Date: 23-01-2002
DOI: 10.1021/MA0111111
Publisher: AIP Publishing
Date: 12-03-2007
DOI: 10.1063/1.2713139
Abstract: The authors report polarized red, electroluminescence peak at 705nm and near infrared, electroluminescence peak at 950nm, light emission from light emitting diodes based on two polyfluorene copolymers. The copolymers are synthesized from a fluorene monomer combined with donor-acceptor-donor comonomers and designed to have a low band gap and form birefringent liquid crystalline phases. Emission occurs from aligned thin films of polymer layers. The emissive layers are aligned by spin coating on a layer of rubbed conducting polymer poly(3,4-ethylene dioxythiophene)-poly(styrene sulphonate) and thermally converted into glassy nematic liquid crystalline state.
Publisher: American Chemical Society (ACS)
Date: 25-05-2002
DOI: 10.1021/MA011768M
Publisher: American Chemical Society (ACS)
Date: 12-08-2010
DOI: 10.1021/JA104786X
Abstract: We have studied the influence of three different fullerene derivatives on the charge generation and recombination dynamics of polymer/fullerene bulk heterojunction (BHJ) solar cell blends. Charge generation in APFO3/[70]PCBM and APFO3/[60]PCBM is very similar and somewhat slower than charge generation in APFO3/[70]BTPF. This difference qualitatively matches the trend in free energy change of electron transfer estimated from the LUMO energies of the polymer and fullerene derivatives. The first order (geminate) charge recombination rate is significantly different for the three fullerene derivatives studied and increases in the order APFO3/[70]PCBM < APFO3/[60]PCBM < APFO3/[70]BTPF. The variation in electron transfer rate cannot be explained from the LUMO energies of the fullerene derivatives and single-step electron transfer in the Marcus inverted region and simple considerations of expected trends for the reorganization energy and free energy change. Instead we suggest that geminate charge recombination occurs from a state where electrons and holes have separated to different distances in the various materials because of an initially high charge mobility, different for different materials. In a BHJ thin film this charge separation distance is not sufficient to overcome the electrostatic attraction between electrons and holes and geminate recombination occurs on the nanosecond to hundreds of nanoseconds time scale. In a BHJ solar cell, we suggest that the internal electric field in combination with polarization effects and the dynamic nature of polarons are key features to overcome electron-hole interactions to form free extractable charges.
Publisher: Springer Science and Business Media LLC
Date: 06-2004
Publisher: American Chemical Society (ACS)
Date: 12-08-2008
DOI: 10.1021/NL801510Z
Abstract: We demonstrate the use of self-assembled bionanostructures in polymer light-emitting diodes. Amyloid fibrils formed by protein misfolding were decorated with a soluble luminescent conjugated polymer. This conjugated polymer complex with amyloid fibrils was used as the active layer in a light emitting diode, resulting in a 10-fold increase in external quantum efficiency compared with pristine polymer, because of improved carrier injection.
Publisher: American Chemical Society (ACS)
Date: 15-03-2000
DOI: 10.1021/MA991582B
Publisher: Royal Society of Chemistry (RSC)
Date: 2009
DOI: 10.1039/B913769F
Abstract: Conjugated polymers as electron donors in solar cells based on donor/acceptor combinations are of great interest, partly due to the possibility of converting solar light with a low materials budget. Six small bandgap polymers with optical bandgap ranging from 1.0-1.9 eV are presented in this paper. All polymers utilize an electron donor-acceptor-donor (DAD) segment in the polymer backbone, creating a partial charge-transfer, to decrease the bandgap. The design, synthesis and the optical characteristics as well as the solar cell characteristics of the polymers are discussed. The positions of the energy levels of the conjugated polymer relative to the electron acceptor are of significant importance and determine not only the driving force for exciton dissociation but also the maximum open-circuit voltage. This work also focuses on investigating the redox behavior of the described conjugated polymers and electron acceptors using square wave voltammetry. Comparing the electrochemical data gives important information of the structure-property relationships of the polymers.
Publisher: Springer Science and Business Media LLC
Date: 05-2003
DOI: 10.1007/BF02348443
Publisher: Elsevier BV
Date: 06-2000
Publisher: Royal Society of Chemistry (RSC)
Date: 2010
DOI: 10.1039/C0PY00152J
Publisher: Royal Society of Chemistry (RSC)
Date: 1999
DOI: 10.1039/A902859E
Publisher: Wiley
Date: 17-06-2003
Publisher: Elsevier BV
Date: 2007
Publisher: Elsevier BV
Date: 06-1999
Publisher: Wiley
Date: 03-2001
DOI: 10.1002/1521-4095(200103)13:5<323::AID-ADMA323>3.0.CO;2-X
Publisher: American Chemical Society (ACS)
Date: 14-09-2001
DOI: 10.1021/MA010575W
Publisher: Wiley
Date: 09-2000
DOI: 10.1002/1521-4095(200009)12:18<1367::AID-ADMA1367>3.0.CO;2-Z
Publisher: Elsevier BV
Date: 02-2004
Publisher: Elsevier BV
Date: 05-2006
Publisher: Elsevier BV
Date: 04-2003
Publisher: SPIE
Date: 21-04-2006
DOI: 10.1117/12.662857
Publisher: Elsevier BV
Date: 12-2004
Publisher: AIP Publishing
Date: 14-07-2008
DOI: 10.1063/1.2949073
Abstract: Amyloid nanowires were incorporated in organic photovoltaic devices in order to enhance the transport properties. Amyloid fibrils act as a template for donor-acceptor materials. The current-voltage characteristics under illumination and in the dark display a maximum for the fill factor and the space charge limit current, respectively, at an amyloid nanowire-donor-acceptor mass ratio of 0.014:1:1, associated to a better charge transport in the donor-acceptor domains. The absorption experiments display a redshift associated to a more planar polymer backbone with increasing concentration of amyloid fibrils. Amyloid nanowires present a significant effect on the donor-acceptor materials organization.
Publisher: Elsevier BV
Date: 06-07-2007
Publisher: Wiley
Date: 02-2000
DOI: 10.1002/(SICI)1521-4095(200002)12:3<189::AID-ADMA189>3.0.CO;2-2
Publisher: Elsevier BV
Date: 03-2001
Publisher: Elsevier BV
Date: 06-1999
Publisher: Springer Science and Business Media LLC
Date: 03-2012
Publisher: AIP Publishing
Date: 25-02-2004
DOI: 10.1063/1.1650878
Abstract: The photovoltaic parameters of donor/acceptor blend organic solar cells are highly influenced by several parameters, such as the strength of the acceptor species, the morphology of the film due to the solvent, and the mobility of the free charge carriers. In this work, the open-circuit voltage (Voc) of solar cells based on series of conjugated polythiophene polymers were measured and compared. In every cell, the donor polymer was blended with an electron acceptor fullerene molecule. The devices were constructed in a sandwich structure with indium tin oxide (ITO)/metallic polymer (PEDOT:PSS) acting as an anode and Al or LiF/Al acting as a cathode. Comparing the Voc of all the cells shows that this important photovoltaic parameter is systematically varying with the polymer. The variation of photovoltage is attributed to the variation of the oxidation potential of the donor conjugated polymers after due consideration of the different injection conditions in the varying polymers.
Publisher: American Chemical Society (ACS)
Date: 05-06-2009
DOI: 10.1021/MA802457V
Publisher: American Chemical Society (ACS)
Date: 07-2000
DOI: 10.1021/MA9911389
Publisher: Elsevier BV
Date: 06-1999
Publisher: Elsevier BV
Date: 07-2003
Publisher: American Chemical Society (ACS)
Date: 19-07-2001
DOI: 10.1021/JP010511N
Publisher: Wiley
Date: 08-09-2010
Publisher: IOP Publishing
Date: 11-10-2002
Publisher: Wiley
Date: 20-03-2006
Publisher: Royal Society of Chemistry (RSC)
Date: 2011
DOI: 10.1039/C1CC11053E
Abstract: A new low band gap polymer (E(g) = 1.6 eV) with alternating thiophene and isoindigo units was synthesized and characterized. A PCE of 3.0% and high open-circuit voltage of 0.89 V were realized in polymer solar cells, which demonstrated the promise of isoindigo as an electron deficient unit in the design of donor-acceptor conjugated polymers for polymer solar cells.
Publisher: American Chemical Society (ACS)
Date: 20-04-2001
DOI: 10.1021/MA001921X
Publisher: Royal Society of Chemistry (RSC)
Date: 2014
DOI: 10.1039/C3EE42989J
Publisher: Elsevier BV
Date: 03-2001
Publisher: Wiley
Date: 26-04-2005
Publisher: American Chemical Society (ACS)
Date: 16-02-2001
DOI: 10.1021/MA001684Y
Publisher: Elsevier BV
Date: 03-2001
Publisher: Elsevier BV
Date: 09-2005
Publisher: Elsevier BV
Date: 04-2006
Publisher: Wiley
Date: 12-2001
DOI: 10.1002/1521-4095(200112)13:24<1871::AID-ADMA1871>3.0.CO;2-3
Publisher: AIP Publishing
Date: 29-04-2004
DOI: 10.1063/1.1739279
Abstract: The influence of different anode buffer layers on the performance of solar cells based on blends of polyfluorene copolymer poly[2,7-(9,9-dioctyl-fluorene)-alt-5,5-(4′,7′-di-2-thienyl-2′,1′,3′-benzothiadiazole)] (DiO-PFDTBT), acting as electron donor, and [6,6]-phenyl-C61-butyric acid methylester (PCBM), acting as electron acceptor was studied. The buffer layers were constructed from different forms of poly(3,4-ethylenedioxythiophene) poly(styrenesulfonate)(PEDOT-PSS). Variations in open-circuit voltage, short-circuit current, and fill factor were observed. These were attributed to the slight rearrangement of the insulating layer PSS on top of PEDOT, which altered the charge injection at the interface between anode and photoactive layer.
Publisher: Elsevier BV
Date: 04-2001
Publisher: Elsevier BV
Date: 07-2006
Publisher: American Chemical Society (ACS)
Date: 15-09-2010
DOI: 10.1021/OL1020724
Abstract: The nitration of 4,7-dibromo-2,1,3-benzothiadiazole was modified by using CF(3)SO(3)H and HNO(3) as the nitrating agent, and the related yield was improved greatly. On the basis of this improvement, two new small band gap polymers, P1TPQ and P3TPQ, were developed. Bulk heterojunction solar cells based on P3TPQ and [6,6]-phenyl-C(71)-butyric acid methyl ester exhibit interesting results with a power conversion efficiency of 2.1% and photoresponse up to 1.1 μm.
Publisher: AIP Publishing
Date: 26-01-2009
DOI: 10.1063/1.3073710
Abstract: The role of an optical spacer layer has been examined by optical simulations of organic solar cells with various bandgaps. The simulations have been performed with the transfer matrix method and the finite element method. The results show that no beneficial effect can be expected by adding an optical spacer to a solar cell with an already optimized active layer thickness.
Publisher: Elsevier BV
Date: 04-2011
Publisher: Elsevier BV
Date: 03-2001
Publisher: Elsevier BV
Date: 07-2010
Publisher: Royal Society of Chemistry (RSC)
Date: 2008
DOI: 10.1039/B811957K
No related grants have been discovered for Olle Inganäs.