Efficient Blue-Colored Solid-State Dye-Sensitized Solar Cells: Enhanced Charge Collection by Using an in Situ Photoelectrochemically Generated Conducting Polymer Hole Conductor

Jinbao Zhang; Nick Vlachopoulos; Yan Hao; Thomas W Holcombe; Gerrit Boschloo; Erik M J Johansson; Michael Grätzel; Anders Hagfeldt

doi:10.1002/cphc.201600064

Efficient Blue-Colored Solid-State Dye-Sensitized Solar Cells: Enhanced Charge Collection by Using an in Situ Photoelectrochemically Generated Conducting Polymer Hole Conductor

Chemphyschem. 2016 May 18;17(10):1441-5. doi: 10.1002/cphc.201600064. Epub 2016 Mar 7.

Authors

Jinbao Zhang¹, Nick Vlachopoulos², Yan Hao¹, Thomas W Holcombe³, Gerrit Boschloo¹, Erik M J Johansson⁴, Michael Grätzel³, Anders Hagfeldt^{1

5}

Affiliations

¹ Department of Chemistry-Ångström, Centre of Molecular Devices, Uppsala University, 75120, Uppsala, Sweden.
² Laboratory of Photomolecular Science, Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne Chemin des Alambics, Station 6, Lausanne, 1015, Switzerland. nikolaos.vlachopoulos@epfl.ch.
³ Laboratory of Photonics and Interfaces, Institute of Chemical Sciences and Engineering, Swiss Federal Institute of Technology (EPFL), Station 6, Lausanne, 1015, Switzerland.
⁴ Department of Chemistry-Ångström, Centre of Molecular Devices, Uppsala University, 75120, Uppsala, Sweden. erik.johansson@kemi.uu.se.
⁵ Laboratory of Photomolecular Science, Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne Chemin des Alambics, Station 6, Lausanne, 1015, Switzerland.

PMID: 26919196
DOI: 10.1002/cphc.201600064

Abstract

A high power conversion efficiency (PCE) of 5.5 % was achieved by efficiently incorporating a diketopyrrolopyrrole-based dye with a conducting polymer poly(3,4-ethylenediothiophene) (PEDOT) hole-transporting material (HTM) that was formed in situ, compared with a PCE of 2.9 % for small molecular spiro-OMeTAD-based solid-state dye solar cells (sDSCs). The high PCE for PEDOT-based sDSCs is mainly attributed to the significantly enhanced charge-collection efficiency, as a result of the three-order-of-magnitude higher hole conductivity (0.53 S cm(-1) ) compared with that of the widely used low molecular weight HTM spiro-OMeTAD (3.5×10(-4) S cm(-1) ).

Keywords: PEDOT; dyes/pigments; hole-transporting material; photochemistry; polymerization.

Publication types

Research Support, Non-U.S. Gov't