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Self-organised Discotic Liquid Crystals for High Efficiency Organic Photovoltaics
University of Cambridge, UK.
MaxPlanck-Institut für Polymerforschung, Germany.
MaxPlanck-Institut für Polymerforschung, Germany.
Cambridge Display Technology, UK.ORCID iD: 0000-0002-1609-8909
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2001 (English)In: Science, ISSN 0036-8075, E-ISSN 1095-9203, Science, Vol. 293, no 10 august, p. 1119-1122Article in journal (Refereed) Published
Abstract [en]

Self-organization of liquid crystalline and crystalline-conjugated materials has been used to create, directly from solution, thin films with structures optimized for use in photodiodes. The discotic liquid crystal hexa-perihexabenzocoronene was used in combination with a perylene dye to produce thin films with vertically segregated perylene and hexabenzocoronene, with large interfacial surface area. When incorporated into diode structures, these films show photovoltaic response with external quantum efficiencies of more than 34 percent near 490 nanometers. These efficiencies result from efficient photoinduced charge transfer between the hexabenzocoronene and perylene, as well as from effective transport of charges through vertically segregated perylene and hexabenzocoronene psystems. This development demonstrates that complex structures can be engineered from novel materials by means of simple solution-processing steps and may enable inexpensive, high-performance, thin-film photovoltaic technology

Place, publisher, year, edition, pages
Washington, DC, USA: American Association for the Advancement of Science , 2001. Vol. 293, no 10 august, p. 1119-1122
National Category
Physical Sciences
Research subject
Physics
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URN: urn:nbn:se:kau:diva-23303DOI: 10.1126/science.293.5532.1119OAI: oai:DiVA.org:kau-23303DiVA, id: diva2:597059
Available from: 2013-01-22 Created: 2013-01-22 Last updated: 2017-12-07Bibliographically approved

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