研究了三甲川菁染料敏化TiO2 纳米结构电极的光电化学行为.结果表明,使用该染料敏化可显著提高TiO2 纳米结构电极的光电流,使电极的吸收波长红移至可见光区,光电转换效率得到明显改善,IPCE值最高可达12-1 % .
The photoelectrochemical behaviors of the TiO 2 nanostructured porous film sensitized by cyanine dye were investigated in this paper.The results showed that the excitaed state level matched the conduction band edge of TiO 2 nanoparticle.Therefore the sensitization of the dye can increase the photocurrent intensity of the TiO 2 nanostructured electrode obviously and results in a red-shift of optical absorption from the ultra_violet region to the visible.As a result,the light_to _electricity conversion efficiency was improved evidently,the maximum value of IPCE has reached 12.1%.
1 Nazeeruddin M K,Kay A,Rodicio Ietal.Conversion of Lightto Electricity by cis_X2Bis(2 ,2’_bipyridyl_4 ,4_dicarboxylate)ruthenium( Ⅱ) Charge_Transfer Sensitizers(X= Cl- ’Br- ,I- ,CN- ,andSCN- )on NanocrystallineTiO2 Electrodes.J.Am .Chem .Soc.,1993 ,115 :6 382~6 390
2 Cherepy NJ,Smestad GP,GrtaelMet al.Ultrafast Electron Injection :Implications for a PhotoelectrochemicalCell Utiliaing an Anthocyanin Dye_Sensitiaed TiO2 Nanocrystalline Electrode.J.Phys.Chem .B1997 ,101 :9 342~9 351
3 柳闽生,郝彦忠,杨迈之等.纳米尺度TiO2 微料多孔膜电极光电化学.物理化学学报,1997 ,13(11):992 ~998
4 郝彦忠,杨迈之,蔡生民.TiO2 纳米晶多孔膜的电荷传输特性.物理化学学报,1998,14(4) :309 ~314
5 Nazeeruddin M K,Kay A,Rodicio Ietal.Conversion of Lightto Electricity by cis_X2Bis(2 ,2’_bipyridyl_4 ,4_dicarboxylate)ruthenium( Ⅱ) Charge_Transfer Sensitizers(X= Cl- ’Br- ,I- ,CN- ,andSCN- )on NanocrystallineTiO2 Electrodes.J.Am .Chem .Soc.,1993 ,115 :6 382~6 390
6 Vogel R,Hoyer P,Weller H.Quantum_Sized PbS,CdS,Ag2S,Sb2S3 ,and Bi2S3Particlesas Sensitizersfor VariousNanoporous Wide_bandgap Semiconductors.J.Am .Chem .,1994 ,98 :3 183 ~3 188
7 Hagfeldt A,Grtzel M.Light_Induced Redox Reactionsin Nanocrystalline Systems.Chem .Rev.,1995 ,95 :49 ~68