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Novel Blue Organic Dye for Dye-Sensitized Solar Cells Achieving High Efficiency in Cobalt-Based Electrolytes and by Co-Sensitization
Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Kemiska sektionen, Institutionen för kemi - Ångström, Fysikalisk kemi.
Ecole Polytech Fed Lausanne, Inst Chem Sci & Engn, Lab Photomol Sci, Stn 6, CH-1015 Lausanne, Switzerland..
KTH Royal Inst Technol, Sch Chem Sci & Engn, Dept Chem, Appl Phys Chem, Teknikringen 30, SE-10044 Stockholm, Sweden..
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2016 (Engelska)Ingår i: ACS Applied Materials and Interfaces, ISSN 1944-8244, E-ISSN 1944-8252, Vol. 8, nr 48, s. 32797-32804Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Blue and green dyes as well as NIR-absorbing dyes have attracted great interest because of their excellent ability of absorbing the incident photons in the red and near-infrared range region. A novel blue D-pi-A dye (Dyenamo Blue), based on the diketopyrrolopyrrole (DPP)-core, has been designed and synthesized. Assembled with the cobalt bipyridine-based electrolytes, the device with Dyenamo Blue achieved a satisfying efficiency of 7.3% under one sun (AM1.5 G). The co-sensitization strategy was further applied on this blue organic dye together with a red D-pi-A dye (D35). The successful co-sensitization outperformed a panchromatic light absorption and improved the photocurrent density; this in addition to the open-circuit potential result in an efficiency of 8.7%. The extended absorption of the sensitization and the slower recombination reaction between the blue dye and TiO2 surface inhibited by the additional red sensitizer could be the two main reasons for the higher performance. In conclusion, from the results, the highly efficient cobalt-based DSSCs could be achieved with the co-sensitization between red and blue D-pi-A organic dyes with a proper design, which showed us the possibility of applying this strategy for future high-performance solar cells.

Ort, förlag, år, upplaga, sidor
2016. Vol. 8, nr 48, s. 32797-32804
Nyckelord [en]
blue color, organic dyes, co-sensitization, cobalt electrolyte, dye-sensitized solar cells
Nationell ämneskategori
Materialteknik
Identifikatorer
URN: urn:nbn:se:uu:diva-312632DOI: 10.1021/acsami.6b09671ISI: 000389624600020OAI: oai:DiVA.org:uu-312632DiVA, id: diva2:1066498
Forskningsfinansiär
EnergimyndighetenVetenskapsrådetStandUpKnut och Alice Wallenbergs StiftelseStiftelsen Olle Engkvist ByggmästareTillgänglig från: 2017-01-18 Skapad: 2017-01-12 Senast uppdaterad: 2017-11-29Bibliografiskt granskad

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Hao, YanYang, WenxingZhang, JinbaoHagfeldt, AndersBoschloo, Gerrit
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