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IMPS(intensity-modulated photocurrent spectroscopy) and IMVS(intensity–modulated photovoltage spectroscopy) measurements are utilized to analyse different mechanisms for enhancing the performance of dye-sensitized solar cells(DSC) based on modified anode. Electron transport and back reaction in DSC are investigated under different illumination intensities. The modifications of anode, blocking layer and modified TiO2films, are performed by electrodeposition. It is found that short-current density Jsc and efficiency η of DSC are improved, but different mechanisms are obtained: the optimization of TCO by coating a blocking layer can effectively extend electron lifetime τ n, but it has little influence on electron transport. On the other hand, the optimization of TiO2 film can enhance electron transport, finally shorten transit time τ d and extend τ n.
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Keywords:
- dye-sensitized /
- solar cells /
- IMPS/IMVS /
- electron transport
[1] Oregan B, Graetzel M 1991 Nature 353 737
[2] You H L, Zhang C F 2009 Chin. Phys. B 18 349
[3] Liang L Y, Dai S Y, Hu L H, Dai J, Liu W Q 2009 Acta Phys. Sin. 58 1338 (in Chinese) [梁林云、 戴松元、 胡林华、 戴 俊、 刘伟庆 2009 58 1338]
[4] Dai J, Hu L H, Lin W Q, Dai S Y 2008 Acta Phys. Sin. 57 5310 (in Chinese) [戴 俊、 胡林华、 刘伟庆、 戴松元 2008 57 5310]
[5] Chen C Y, Wang M K, Li J Y, Pootrakulchote N, Alibabaei L, Ngoc-le C H, Tsai J H, Graetzel C, Wu C G, Zakeeruddin S M, Graetzel M 2009 ACS Nano 3 3103
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[7] Gregg B A 2004 Coord. Chem. Rev. 248 1215
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[9] Hagfeldt A, Graetzel M 1995 Chem. Rev. 95 49
[10] Zhu K, Schiff E A, Park N G, van de Lagemaat J, Frank A J 2002 Appl. Phys. Lett. 80 685
[11] Cameron P J, Peter L M 2003 J. Phys. Chem. B 107 14394
[12] Chen Y, Chen W, Guo F, Li M Y, Liu W, Zhao X Z 2009 Chin. Phys. B 18 3922
[13] Nazeeruddin M K, Kay A, Rodicio I, Humphrybaker R, Muller E, Liska P, Vlachopoulos N, Graetzel M 1993 J. Am. Chem. Soc. 115 6382
[14] Hao S C, Wu J H, Fan L Q, Huang Y F, Lin H M, Wei Y L 2004 Sol. Energy 76 745
[15] Hart J N, Menzies D, Cheng Y B, Simon G P, Spiccia L 2006 C. R. Chimie 9 622
[16] Xu W W, Dai S Y, Fang X Q, Hu L H, Kong F T, Pan X, Wang K J 2005 Acta Phys. Sin. 54 5943 (in Chinese) [徐炜炜、 戴松元、 方霞琴、 胡林华、 孔凡太、 潘 旭、 王孔嘉 2005 54 5943]
[17] Yang S M, Huang Y Y, Huang C H, Zhao X S 2002 Chem. Mater. 14 1500
[18] Yang S M, Li F Y, Huang C H 2003 Sci. China B 33 59 (in Chinese) [杨术明、 李福友、 黄春辉 2003 中国科学B 33 59]
[19] Kay A, Graetzel M 2002 Chem. Mater. 14 2930
[20] Lenzmann F, Krueger J, Burnside S, Brooks K, Graetzel M, Gal D, Ruhle S, Cahen D 2001 J. Phys. Chem. B 105 6347
[21] Dloczik L, Ileperuma O, Lauermann I, Peter L M, Ponomarev E A, Redmond G, Shaw N J, Uhlendorf I 1997 J. Phys. Chem. B 101 10281
[22] Schlichthorl G,Huang S Y, Sprague J, Frank A J 1997 J. Phys. Chem. B 101 8141
[23] Schlichthorl G, Park N G, Frank A J 1999 J. Phys. Chem. B 103 782
[24] Stathatos E, Lianos R, Zakeeruddin S M, Liska P, Graetzel M 2003 Chem. Mater. 15 1825
[25] Hu L H, Dai S Y, Wang K J 2003 Acta Phys. Sin. 52 2135 (in Chinese) [胡林华、 戴松元、 王孔嘉 2003 52 2135]
[26] Schlichthorl G, Park N G, Frank A J 1999 J. Phys. Chem. B 103 782
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[1] Oregan B, Graetzel M 1991 Nature 353 737
[2] You H L, Zhang C F 2009 Chin. Phys. B 18 349
[3] Liang L Y, Dai S Y, Hu L H, Dai J, Liu W Q 2009 Acta Phys. Sin. 58 1338 (in Chinese) [梁林云、 戴松元、 胡林华、 戴 俊、 刘伟庆 2009 58 1338]
[4] Dai J, Hu L H, Lin W Q, Dai S Y 2008 Acta Phys. Sin. 57 5310 (in Chinese) [戴 俊、 胡林华、 刘伟庆、 戴松元 2008 57 5310]
[5] Chen C Y, Wang M K, Li J Y, Pootrakulchote N, Alibabaei L, Ngoc-le C H, Tsai J H, Graetzel C, Wu C G, Zakeeruddin S M, Graetzel M 2009 ACS Nano 3 3103
[6] Frank A J, Kopidakis N, van de Lagemaat J 2004 Coord. Chem. Rev. 248 1165
[7] Gregg B A 2004 Coord. Chem. Rev. 248 1215
[8] Xiong B T, Zhou B X, Bai J, Zheng Q, Liu Y B, Cai W M, Cai J 2008 Chin. Phys. B 17 3713
[9] Hagfeldt A, Graetzel M 1995 Chem. Rev. 95 49
[10] Zhu K, Schiff E A, Park N G, van de Lagemaat J, Frank A J 2002 Appl. Phys. Lett. 80 685
[11] Cameron P J, Peter L M 2003 J. Phys. Chem. B 107 14394
[12] Chen Y, Chen W, Guo F, Li M Y, Liu W, Zhao X Z 2009 Chin. Phys. B 18 3922
[13] Nazeeruddin M K, Kay A, Rodicio I, Humphrybaker R, Muller E, Liska P, Vlachopoulos N, Graetzel M 1993 J. Am. Chem. Soc. 115 6382
[14] Hao S C, Wu J H, Fan L Q, Huang Y F, Lin H M, Wei Y L 2004 Sol. Energy 76 745
[15] Hart J N, Menzies D, Cheng Y B, Simon G P, Spiccia L 2006 C. R. Chimie 9 622
[16] Xu W W, Dai S Y, Fang X Q, Hu L H, Kong F T, Pan X, Wang K J 2005 Acta Phys. Sin. 54 5943 (in Chinese) [徐炜炜、 戴松元、 方霞琴、 胡林华、 孔凡太、 潘 旭、 王孔嘉 2005 54 5943]
[17] Yang S M, Huang Y Y, Huang C H, Zhao X S 2002 Chem. Mater. 14 1500
[18] Yang S M, Li F Y, Huang C H 2003 Sci. China B 33 59 (in Chinese) [杨术明、 李福友、 黄春辉 2003 中国科学B 33 59]
[19] Kay A, Graetzel M 2002 Chem. Mater. 14 2930
[20] Lenzmann F, Krueger J, Burnside S, Brooks K, Graetzel M, Gal D, Ruhle S, Cahen D 2001 J. Phys. Chem. B 105 6347
[21] Dloczik L, Ileperuma O, Lauermann I, Peter L M, Ponomarev E A, Redmond G, Shaw N J, Uhlendorf I 1997 J. Phys. Chem. B 101 10281
[22] Schlichthorl G,Huang S Y, Sprague J, Frank A J 1997 J. Phys. Chem. B 101 8141
[23] Schlichthorl G, Park N G, Frank A J 1999 J. Phys. Chem. B 103 782
[24] Stathatos E, Lianos R, Zakeeruddin S M, Liska P, Graetzel M 2003 Chem. Mater. 15 1825
[25] Hu L H, Dai S Y, Wang K J 2003 Acta Phys. Sin. 52 2135 (in Chinese) [胡林华、 戴松元、 王孔嘉 2003 52 2135]
[26] Schlichthorl G, Park N G, Frank A J 1999 J. Phys. Chem. B 103 782
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