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Title: | Ultrathin Ammonium Heptamolybdate Films as Efficient Room- Temperature Hole Transport Layers for Organic Solar Cells | Authors: | Qiu, Weiming Hadipour, Afshin Müller, Robert CONINGS, Bert BOYEN, Hans-Gerd Heremans, Paul Froyen, Ludo |
Issue Date: | 2014 | Source: | ACS Applied Materials & Interfaces, 6 (18), p. 16335-16343 | Abstract: | Ammonium heptamolybdate (NH4)6Mo7O24·4H2O (AHM) and its peroxo derivatives are analyzed as solution-processed room temperature hole transport layer (HTL) in organic solar cells. Such AHM based HTLs are investigated in devices with three different types of active layers, i.e., solution-processed poly(3-hexylthiophene)/[6,6]-phenyl C61-butyric acid methyl ester(P3HT/PC60BM), poly[N-9′-heptadecanyl-2,7-carbazole-alt-5,5-(4′,7′-di-2-thienyl-2′,1′,3′-benzothiadiazole)]/[6,6]-phenyl C70-butyric acid methyl ester-(PCDTBT/PC70BM) and evaporated small molecule chloro-(subphthalocyaninato)boron(III) (SubPc)/C60. By virtue of their high work functions, AHM based HTLs outperform the commonly used poly(3,4-ethylenedioxythiophene):polystyrenesulfonate (PEDOT:PSS) HTL for devices employing deep HOMO level active materials. Moreover, devices using AHM based HTLs can achieve higher short circuit current (Jsc) than the ones with evaporated molybdenum oxide(eMoO3), and thus better power conversion efficiency (PCE). In addition, P3HT/ PC60BM devices with AHM based HTLs show air stability comparable to those with eMoO3, and much better than the ones with PEDOT:PSS. | Notes: | Qiu, WM (reprint author), IMEC, Kapeldreef 75, B-3001 Heverlee, Belgium. Weiming.Qiu@imec.be | Keywords: | ammonium heptamolybdate; H2O2 modification; room temperature; hole transport layers; organic solar cells | Document URI: | http://hdl.handle.net/1942/17662 | ISSN: | 1944-8244 | e-ISSN: | 1944-8252 | DOI: | 10.1021/am504606u | ISI #: | 000342328300086 | Rights: | © XXXX American Chemical Society. | Category: | A1 | Type: | Journal Contribution | Validations: | ecoom 2015 |
Appears in Collections: | Research publications |
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