An interesitng class of organicA-π-D-π-A dyes based on an N,N,N＇,N＇-tetraphenylbenzidine（TPD） unit as donor was designed and synthesized for dye-sensitized solar cells（DSSCs）. TPD-4-based DSSCs gave a short c...An interesitng class of organicA-π-D-π-A dyes based on an N,N,N＇,N＇-tetraphenylbenzidine（TPD） unit as donor was designed and synthesized for dye-sensitized solar cells（DSSCs）. TPD-4-based DSSCs gave a short circuit photocurrent density（Jsc） of 16.67 mA/cm2, a open circuit voltage（Voc） of 0.635 V and a fill factor（f/） of 0.68, achieving a solar-to-electricity conversion efficiency（r/） of 7.22% in preliminary tests. The N3-sensitized device gave an η value of 8.02% with a Jsc of 18.81 mA/cm2, a Voc of 0.630 V and anffof 0.68 under the same conditions. The incident photo-to-current efficiency（IPCE） values above 70% observed in a range of 460 to 600 nm with a maximum value of 80% at 500 nm indicate that the TPD-4-based DSSC shows a high performance. Under the same conditions, the DSSC based on N3 provided the IPCE values above 70% in a range of 490 to 580 nm with a maximum value of 76% at 500 nm. Both further optimization of the device processing and structural modification of these dyes are an- ticipated to make the device give even better performances.展开更多
基金Supported by the National Natural Science Foundation of China （No. 20872142）.
文摘An interesitng class of organicA-π-D-π-A dyes based on an N,N,N＇,N＇-tetraphenylbenzidine（TPD） unit as donor was designed and synthesized for dye-sensitized solar cells（DSSCs）. TPD-4-based DSSCs gave a short circuit photocurrent density（Jsc） of 16.67 mA/cm2, a open circuit voltage（Voc） of 0.635 V and a fill factor（f/） of 0.68, achieving a solar-to-electricity conversion efficiency（r/） of 7.22% in preliminary tests. The N3-sensitized device gave an η value of 8.02% with a Jsc of 18.81 mA/cm2, a Voc of 0.630 V and anffof 0.68 under the same conditions. The incident photo-to-current efficiency（IPCE） values above 70% observed in a range of 460 to 600 nm with a maximum value of 80% at 500 nm indicate that the TPD-4-based DSSC shows a high performance. Under the same conditions, the DSSC based on N3 provided the IPCE values above 70% in a range of 490 to 580 nm with a maximum value of 76% at 500 nm. Both further optimization of the device processing and structural modification of these dyes are an- ticipated to make the device give even better performances.
