eprintid: 10125077 rev_number: 14 eprint_status: archive userid: 608 dir: disk0/10/12/50/77 datestamp: 2021-05-19 16:45:53 lastmod: 2021-10-10 22:59:31 status_changed: 2021-05-19 16:45:53 type: article metadata_visibility: show creators_name: Hu, Y creators_name: Yella, A creators_name: Guldin, S creators_name: Schreier, M creators_name: Stellacci, F creators_name: Graetzel, M creators_name: Stefik, M title: High-Surface-Area Porous Platinum Electrodes for Enhanced Charge Transfer ispublished: pub divisions: UCL divisions: B04 divisions: C05 divisions: F43 note: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. abstract: Cobalt-based electrolytes are highly tunable and have pushed the limits of dye-sensitized solar cells, enabling higher open-circuit voltages and new record efficiencies. However, the performance of these electrolytes and a range of other electrolytes suffer from slow electron transfer at platinum counter electrodes. High surface area platinum would enhance catalysis, but pure platinum structures are too expensive in practice. Here, a material-efficient host-guest architecture is developed that uses an ultrathin layer of platinum deposited upon an electrically conductive scaffold, niobium-doped tin oxide (NTO). This nanostructured composite enhances the counter electrode performance of dye-sensitized solar cells (DSCs) using a Co(II/III)BPY3 electrolyte with an increased fill factor and power conversion efficiency (11.26%), compared to analogous flat films. The modular strategy is elaborated by integrating a light scattering layer onto the counter electrode to reflect unabsorbed light back to the photoanode to improve the short-circuit current density and power conversion efficiency. date: 2014-10-07 date_type: published publisher: WILEY-V C H VERLAG GMBH official_url: https://doi.org/10.1002/aenm.201400510 oa_status: green full_text_type: other language: eng primo: open primo_central: open_green verified: verified_manual elements_id: 972763 doi: 10.1002/aenm.201400510 lyricists_name: Guldin, Stefan lyricists_id: SGULD10 actors_name: Guldin, Stefan actors_id: SGULD10 actors_role: owner full_text_status: public publication: Advanced Energy Materials volume: 4 number: 14 pages: 8 citation: Hu, Y; Yella, A; Guldin, S; Schreier, M; Stellacci, F; Graetzel, M; Stefik, M; (2014) High-Surface-Area Porous Platinum Electrodes for Enhanced Charge Transfer. Advanced Energy Materials , 4 (14) 10.1002/aenm.201400510 <https://doi.org/10.1002/aenm.201400510>. Green open access document_url: https://discovery.ucl.ac.uk/id/eprint/10125077/1/Porous%20Platinum_presubmission_YH%20Adanced%20energy%20materials.pdf