Tailor and functionalize TiO2 compact layer by acid treatment for high performance dye-sensitized solar cell and its enhancement mechanism
Surface tailoring and functionalization of an annealed TiO2 compact layer by H2SO4 acid was performed to improve the dye-sensitized solar cell (DSSC) performance. Compared to untreated counterpart, the acid-treated compact layer possesses a rougher surface and more hydroxyl groups, which result in i...
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sg-ntu-dr.10356-998082020-03-07T11:40:22Z Tailor and functionalize TiO2 compact layer by acid treatment for high performance dye-sensitized solar cell and its enhancement mechanism Guai, Guan Hong Song, Qun Liang Lu, Zhisong Ng, Chee Mang Li, Chang Ming School of Chemical and Biomedical Engineering Centre for Advanced Bionanosystems Chemical and Biomedical Engineering Surface tailoring and functionalization of an annealed TiO2 compact layer by H2SO4 acid was performed to improve the dye-sensitized solar cell (DSSC) performance. Compared to untreated counterpart, the acid-treated compact layer possesses a rougher surface and more hydroxyl groups, which result in increased surface area and enhanced adherence of the compact layer with the mesoporous TiO2 film by Ti–O–Ti bonds formed by a followed heating process. Impedance measurement was further used to investigate the enhancement mechanism, indicating the acid post treatment of the TiO2 compact layer reduces the ohmic bulk resistivity while effectively suppressing charge recombination at FTO/electrolyte interface. In DSSCs with untreated TiO2 compact layer, a significantly increased series resistivity is very likely to be the rate determining factor to limit the charge separation process. Thus, an optimal post acid treatment could reduce the resistivity for high charge transport, resulting in larger short-circuit current for further improvement of power conversion efficiency from 6.60% in DSSC with untreated compact layer to 7.21% in DSSC with acid-treated compact layer. This work also provides fundamental insight of the compact layer for DSSC performance improvement. 2013-11-12T05:31:43Z 2019-12-06T20:11:51Z 2013-11-12T05:31:43Z 2019-12-06T20:11:51Z 2012 2012 Journal Article Guai, G. H., Song, Q. L., Lu, Z. S., Ng, C. M., & Li, C. M. (2013). Tailor and functionalize TiO2 compact layer by acid treatment for high performance dye-sensitized solar cell and its enhancement mechanism. Renewable Energy, 51, 29-35. 0960-1481 https://hdl.handle.net/10356/99808 http://hdl.handle.net/10220/17597 10.1016/j.renene.2012.08.078 en Renewable energy |
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Chemical and Biomedical Engineering Guai, Guan Hong Song, Qun Liang Lu, Zhisong Ng, Chee Mang Li, Chang Ming Tailor and functionalize TiO2 compact layer by acid treatment for high performance dye-sensitized solar cell and its enhancement mechanism |
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Surface tailoring and functionalization of an annealed TiO2 compact layer by H2SO4 acid was performed to improve the dye-sensitized solar cell (DSSC) performance. Compared to untreated counterpart, the acid-treated compact layer possesses a rougher surface and more hydroxyl groups, which result in increased surface area and enhanced adherence of the compact layer with the mesoporous TiO2 film by Ti–O–Ti bonds formed by a followed heating process. Impedance measurement was further used to investigate the enhancement mechanism, indicating the acid post treatment of the TiO2 compact layer reduces the ohmic bulk resistivity while effectively suppressing charge recombination at FTO/electrolyte interface. In DSSCs with untreated TiO2 compact layer, a significantly increased series resistivity is very likely to be the rate determining factor to limit the charge separation process. Thus, an optimal post acid treatment could reduce the resistivity for high charge transport, resulting in larger short-circuit current for further improvement of power conversion efficiency from 6.60% in DSSC with untreated compact layer to 7.21% in DSSC with acid-treated compact layer. This work also provides fundamental insight of the compact layer for DSSC performance improvement. |
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School of Chemical and Biomedical Engineering |
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School of Chemical and Biomedical Engineering Guai, Guan Hong Song, Qun Liang Lu, Zhisong Ng, Chee Mang Li, Chang Ming |
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Guai, Guan Hong Song, Qun Liang Lu, Zhisong Ng, Chee Mang Li, Chang Ming |
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Guai, Guan Hong |
title |
Tailor and functionalize TiO2 compact layer by acid treatment for high performance dye-sensitized solar cell and its enhancement mechanism |
title_short |
Tailor and functionalize TiO2 compact layer by acid treatment for high performance dye-sensitized solar cell and its enhancement mechanism |
title_full |
Tailor and functionalize TiO2 compact layer by acid treatment for high performance dye-sensitized solar cell and its enhancement mechanism |
title_fullStr |
Tailor and functionalize TiO2 compact layer by acid treatment for high performance dye-sensitized solar cell and its enhancement mechanism |
title_full_unstemmed |
Tailor and functionalize TiO2 compact layer by acid treatment for high performance dye-sensitized solar cell and its enhancement mechanism |
title_sort |
tailor and functionalize tio2 compact layer by acid treatment for high performance dye-sensitized solar cell and its enhancement mechanism |
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2013 |
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https://hdl.handle.net/10356/99808 http://hdl.handle.net/10220/17597 |
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