New N-methyl pyrrole and thiophene based D–π–A systems for dye-sensitized solar cells
                                
                                    
                                        作者:Bo Hyung Kim、Harold S. Freeman                                    
                                    
                                        DOI:10.1016/j.dyepig.2012.09.001
                                    
                                    
                                        日期:2013.2
                                    
                                    Dye-sensitized solar cells (DSSCs) containing novel DP-T and DP-P organic sensitizers having thiophene and N-methyl pyrrole moieties as pi bridges in a D-pi-A system were assembled and characterized. Incorporation of a thiophene bridge to give sensitizer DP-T enhanced solar energy capture, while impedance spectroscopy showed a much longer electron recombination lifetime (tau) for the DSSCs based on pyrrole containing sensitizer DP-P. The observed kinetics led to increased open circuit voltage (V-oc) for the device based on DP-P, regardless of types of additives (TBP or DCA) employed in the devices. Better photovoltaic performance was achieved using DP-T. (C) 2012 Elsevier Ltd. All rights reserved.