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Efficient Blue‐Colored Solid‐State Dye‐Sensitized Solar Cells: Enhanced Charge Collection by Using an in Situ Photoelectrochemically Generated Conducting Polymer Hole Conductor |
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| Authors: | Jinbao Zhang Dr Nick Vlachopoulos Dr Yan Hao Dr Thomas W Holcombe Prof Gerrit Boschloo Dr Erik M J Johansson Prof Michael Grätzel Prof Anders Hagfeldt |
| Institution: | 1. Department of Chemistry-?ngstr?m, Centre of Molecular Devices, Uppsala University, Uppsala, Sweden;2. Laboratory of Photomolecular Science, Institute of Chemical Sciences and Engineering, école Polytechnique Fédérale de Lausanne Chemin des Alambics, Station 6, Lausanne, Switzerland;3. Laboratory of Photonics and Interfaces, Institute of Chemical Sciences and Engineering, Swiss Federal Institute of Technology (EPFL), Station 6, Lausanne, Switzerland |
| 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: | dyes/pigments hole-transporting material PEDOT photochemistry polymerization |