High-Efficiency Dye-Sensitized Solar Cells: The Influence of Lithium Ions on Exciton Dissociation, Charge Recombination, and Surface States

Qingjiang Yu; Yinghui Wang; Zhihui Yi; Ningning Zu; Jing Zhang; Min Zhang; Peng Wang

doi:10.1021/nn101384e

Abstract

We present a time-saving staining protocol based upon the low-toxicity and nonvolatile solvent dimethyl sulfoxide for a high-efficiency dye-sensitized solar cell, which is very critical for the roll-to-roll flexible cell production. Power conversion efficiencies of 11.7-12.1% were achieved under AM1.5G simulated sunlights. The intrinsic roles of lithium cations on efficiency enhancement were scrutinized by measuring transient absorption and electrical impedance spectroscopies. Our studies have revealed that lithium ions can enhance exciton dissociation at the energy-offset dye/titania interface effectively. Charge collection is not found to be a crucial current loss channel in our high-efficiency dye-sensitized solar cell.

Keywords

Energy conversion efficiencyDissociation (chemistry)Dye-sensitized solar cellMaterials scienceIonPhotochemistrySolar cellOptoelectronicsExcitonDimethyl sulfoxideChemistryElectrolytePhysical chemistryOrganic chemistry

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Publication Info

Year: 2010
Type: article
Volume: 4
Issue: 10
Pages: 6032-6038
Citations: 550
Access: Closed

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APA Style

                            
                                
                                    Qingjiang Yu, 
                                
                                    Yinghui Wang, 
                                
                                    Zhihui Yi
                                
                                et al.
                            
                            (2010). 
                            High-Efficiency Dye-Sensitized Solar Cells: The Influence of Lithium Ions on Exciton Dissociation, Charge Recombination, and Surface States. 
                            ACS Nano
                            , 4
                            (10)
                            , 6032-6038.
                            https://doi.org/10.1021/nn101384e
                        

Identifiers

DOI: 10.1021/nn101384e