am8b06897_si_001.pdf (1.57 MB)
Light-Induced Interfacial Dynamics Dramatically Improve the Photocurrent in Dye-Sensitized Solar Cells: An Electrolyte Effect
journal contribution
posted on 2018-07-11, 00:00 authored by Jiajia Gao, Ahmed M. El-Zohry, Herri Trilaksana, Erik Gabrielsson, Valentina Leandri, Hanna Ellis, Luca D’Amario, Majid Safdari, James M. Gardner, Gunther Andersson, Lars KlooA significant
increase in the photocurrent generation during light
soaking for solar cells sensitized by the triphenylamine-based D−π–A
organic dyes (PD2 and LEG1) and mediated by cobalt bipyridine redox
complexes has been observed and investigated. The crucial role of
the electrolyte has been identified in the performance improvement.
Control experiments based on a pre-treatment strategy reveals TBP
as the origin. The increase in the current and IPCE has been interpreted by the interfacial charge-transfer kinetics
studies. A slow component in the injection kinetics was exposed for
this system. This change explains the increase in the electron lifetime
and collection efficiency. Photoelectron spectroscopic measurements
show energy shifts at the dye/TiO2 interface, leading us
to formulate a hypothesis with respect to an electrolyte-induced dye
reorganization at the surface.
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- Biophysics
- Biochemistry
- Space Science
- Physical Sciences not elsewhere classified
- Microbiology
- Cell Biology
- Molecular Biology
- Physiology
- Pharmacology
- Biotechnology
- Environmental Sciences not elsewhere classified
- Chemical Sciences not elsewhere classified
- Biological Sciences not elsewhere classified
- Developmental Biology
Keywords
PD 2Light-Induced Interfacial Dynamics Dramaticallyperformance improvementcontrol experimentscharge-transfer kinetics studiesTBPIPCEcollection efficiencyPhotoelectron spectroscopic measurements show energy shiftspre-treatment strategyelectrolyte-induced dye reorganizationDye-Sensitized Solar Cellscobalt bipyridine redox complexeselectron lifetimeinjection kineticsElectrolyte Effectphotocurrent generation
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