DOI: 10.1063/1.3533642. Energy level alignment, electron injection, and charge recombination characteristics in CdS/CdSe cosensitized TiO2 photoelectrode

Energy level alignment, electron injection, and charge recombination characteristics in CdS/CdSe cosensitized TiO2 photoelectrode

10.1063/1.3533642

Crossref journal-article

AIP Publishing

Applied Physics Letters (317)

Abstract

The band-edge levels of CdS-, CdSe-, and CdS/CdSe-sensitized TiO2 electrodes were determined by ultraviolet photoelectron spectroscopy (UPS) to explore the reason leading to the high performance of the TiO2/CdS/CdSe electrode. The obtained UPS results show the stepwise energy level in the TiO2/CdS/CdSe electrode, indicating energy level alignment occurrence between CdS and CdSe in the TiO2/CdS/CdSe. Time-resolved photoluminescence and open-circuit photovoltage decay experiments reveal that the photogenerated electrons in the TiO2/CdS/CdSe have higher injection efficiency, but lower recombination rate to the electrolyte, attributable to the stepwise structure of band-edge levels constructed by the effect of the energy level alignment.

Bibliography

Chi, C.-F., Cho, H.-W., Teng, H., Chuang, C.-Y., Chang, Y.-M., Hsu, Y.-J., & Lee, Y.-L. (2011). Energy level alignment, electron injection, and charge recombination characteristics in CdS/CdSe cosensitized TiO2 photoelectrode. Applied Physics Letters, 98(1).

Authors 7

Ching-Fa Chi (first)
Hsun-Wei Cho (additional)
Hsisheng Teng (additional)
Cho-Ying Chuang (additional)
Yu-Ming Chang (additional)
Yao-Jane Hsu (additional)
Yuh-Lang Lee (additional)

References 21 Referenced 94

10.1016/j.elecom.2009.04.037 / Electrochem. Commun. (2009)
10.1021/ja0782706 / J. Am. Chem. Soc. (2008)
10.1063/1.2757130 / Appl. Phys. Lett. (2007)
10.1039/b817000b / J. Mater. Chem. (2009)
10.1088/0957-4484/18/5/055702 / Nanotechnology (2007)
10.1039/b907765k / J. Mater. Chem. (2009)
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10.1021/cm034081k / Chem. Mater. (2003)
10.1016/S1386-9477(02)00374-0 / Physica E (Amsterdam) (2002)
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10.1039/c0cc00642d / Chem. Commun. (Cambridge)
10.1038/35104607 / Nature (London) (2001)
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10.1021/jp014192b / J. Phys. Chem. B (2002)
See supplementary material at http://dx.doi.org/10.1063/1.3533642 for the detailed experimental methods. (10.1063/1.3533642)
10.1021/cm901762h / Chem. Mater. (2010)
10.1021/ja047311k / J. Am. Chem. Soc. (2004)
10.1002/cphc.200200615 / ChemPhysChem (2003)

Dates

Type	When
Created	14 years, 8 months ago (Jan. 3, 2011, 7:20 p.m.)
Deposited	2 years, 2 months ago (June 24, 2023, 4:26 a.m.)
Indexed	1 month ago (July 30, 2025, 6:56 a.m.)
Issued	14 years, 8 months ago (Jan. 3, 2011)
Published	14 years, 8 months ago (Jan. 3, 2011)
Published Online	14 years, 8 months ago (Jan. 3, 2011)
Published Print	14 years, 8 months ago (Jan. 3, 2011)

Funders 1

National Science Council Taiwan 10.13039/501100001868 National Science Council
Region: Asia
gov (National government)
Labels3
1. National Science Council, Taiwan
2. National Science Council of Taiwan
3. NSC
Awards3
1. NSC-96-2628-002-002-MY3
2. NSC-98-3114-E-007-005
3. NSC-99-ET-E006-003-ET

BibTeX

@article{Chi_2011, title={Energy level alignment, electron injection, and charge recombination characteristics in CdS/CdSe cosensitized TiO2 photoelectrode}, volume={98}, ISSN={1077-3118}, url={http://dx.doi.org/10.1063/1.3533642}, DOI={10.1063/1.3533642}, number={1}, journal={Applied Physics Letters}, publisher={AIP Publishing}, author={Chi, Ching-Fa and Cho, Hsun-Wei and Teng, Hsisheng and Chuang, Cho-Ying and Chang, Yu-Ming and Hsu, Yao-Jane and Lee, Yuh-Lang}, year={2011}, month=jan }

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