Jump to main content
Jump to site search


A Silanol-Functionalized Polyoxometalate with Excellent Electron Transfer Mediating Behavior to ZnO and TiO2 Cathode Interlayers for Highly Efficient and Extremely Stable Polymer Solar Cells

Abstract

Combining high efficiency and long lifetime under ambient conditions still poses a major challenge towards commercialization of polymer solar cells. Here we report a facile strategy that can simultaneously enhance the efficiency and temporal stability of inverted photovoltaic architectures. Inclusion of a silanol-functionalized organic-inorganic hybrid polyoxometalate derived from PW9O34 lacunary phosphotungstate anion, namely (nBu4N)3 [PW9O34(tBuSiOH)3], significantly increases the effectiveness of the electron collecting interface, which consists of a metal oxide such as titanium dioxide or zinc oxide, and leads to a high efficiency of 6.51% for single-junction structures based on poly(3-hexylthiophene):indene-C60 bisadduct (P3HT:IC60BA) blends. The above favourable outcome stems from a large decrease in the work function, an effective surface passivation and a decrease in surface energy of metal oxides which synergistically result in the outstanding electron transfer mediating capability of the functionalized polyoxometalate. In addition, the insertion of silanol-functionalized polyoxometalate layer significantly enhances the temporal stability of un-encapsulated devices by retaining nearly 90% of their original efficiencies (T90) after storage for 1000 hours in ambient environment.

Back to tab navigation

Supplementary files

Publication details

The article was received on 31 Oct 2017, accepted on 20 Dec 2017 and first published on 21 Dec 2017


Article type: Paper
DOI: 10.1039/C7TC04960A
Citation: J. Mater. Chem. C, 2017, Accepted Manuscript
  •   Request permissions

    A Silanol-Functionalized Polyoxometalate with Excellent Electron Transfer Mediating Behavior to ZnO and TiO2 Cathode Interlayers for Highly Efficient and Extremely Stable Polymer Solar Cells

    M. Tountas, Y. Topal, A. Verykios, A. Soultati, A. Kaltzoglou, T. Papadopoulos, F. Auras, K. Seintis, M. Fakis, L. C. Palilis, D. Tsikritzis, S. Kennou, A. Fakharuddin, L. Schmidt-Mende, S. Gardelis, M. Kus, P. Falaras, D. Davazoglou, P. Argitis and M. vasilopoulou, J. Mater. Chem. C, 2017, Accepted Manuscript , DOI: 10.1039/C7TC04960A

Search articles by author

Spotlight

Advertisements