Herein, a novel photoelectrochemical heterostructure based on TiO2 nanotube layers uniformly coated by a CdS thin layer (using ALD) is presented. Downscaling the nanotube diameter (from 95 to 35 nm) resulted in a 2-fold enhancement of the UV and Vis light photocurrents. Further photocurrent improvement resulted from the prior annealing of the TiO2 nanotube layers from 300 to 600 °C.

Center of Materials and Nanotechnologies Faculty of Chemical Technology University of Pardubice Nam Cs Legii 565 530 02 Pardubice Czech Republic

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Green M. A., Emery K., Hishikawa Y., Warta W., Dunlop E. D. Prog. Photovoltaics. 2016;24:905–913.

Carlson D. E., Wronski C. R. Appl. Phys. Lett. 1976;28:671.

Britt J., Ferekides C. Appl. Phys. Lett. 1993;62:2851.

Jackson P., Hariskos D., Lotter E., Paetel S., Wuerz R., Menner R., Wischmann W., Powalla M. Prog. Photovoltaics. 2011;19:894–897.

Todorov T. K., Tang J., Bag S., Gunawan O., Gokmen T., Zhu Y., Mitzi D. B. Adv. Energy Mater. 2013;3:34–38.

O'Regan B., Grätzel M. Nature. 1991;353:737–740.

Kojima A., Teshima K., Shirai Y., Miyasaka T. J. Am. Chem. Soc. 2009;131:6050–6051. PubMed

Sun W.-T., Yu Y., Pan H.-Y., Gao X.-F., Chen Q., Peng L.-M. J. Am. Chem. Soc. 2008;130:1124–1125. PubMed

Zhao D., Yang Ch.-F. Renewable Sustainable Energy Rev. 2016;24:1048–1059.

Wang H., Wang G., Ling Y., Lepert M., Wang C., Zhang J. Z., Li Y. Nanoscale. 2012;4:1463–1466. PubMed

Liu M., Johnston M. M., Snaith H. J. Nature. 2013;501:395–398. PubMed

Macak J. M., Tsuchiya H., Ghicov A., Yasuda K., Hahn R., Bauer S., Schmuki P. Curr. Opin. Solid State Mater. Sci. 2007;11:3–18.

So S., Hwang I., Schmuki P. Energy Environ. Sci. 2015;8:849–854.

Kim W. S., Jang Y. G., Kim D. H., Kim H. C., Hong S. H. CrystEngComm. 2012;14:4963–4966.

Hwang Y. J., Hahn C., Liu B., Yang P. ACS Nano. 2012;6:5060–5069. PubMed

Li X., Yu J., Low J., Fang Y., Xiao J., Chen X. J. Mater. Chem. A. 2015;3:2485–2534.

Mirabolghasemi H., Liu N., Lee K., Schmuki P. Chem. Commun. 2013;49:2067–2069. PubMed

Miao Z., Xu D., Ouyang J., Guo G., Zhao X., Tang Y. Nano Lett. 2002;2:717–720.

Gao X. F., Li H. B., Sun W. T., Chen Q., Tang F. Q., Peng L. M. J. Phys. Chem. C. 2009;113:7531–7535.

Macak J. M., Kohoutek T., Wang L., Beranek R. Nanoscale. 2013;5:9541–9545. PubMed

Krbal M., Sopha H., Podzemna V., Das S., Prikryl J., Macak J. M. J. Phys. Chem. C. 2017;121:6065–6071. PubMed PMC

Fernandes J. A., Migowski P., Fabrim Z., Feil A. F., Rosa G., Khan S., Machado G. J., Fichtner P. F. P., Teixeira S. R., Santos M. J. L., Dupont J. Phys. Chem. Chem. Phys. 2014;16:9148–9153. PubMed

Das S., Sopha H., Krbal M., Zazpe R., Podzemna V., Prikryl J., Macak J. M. ChemElectroChem. 2017;4:495–499. PubMed PMC

Kalanur S. S., Lee S. H., Hwang Y. J., Joo O.-S. J. Photochem. Photobiol., A. 2013;259:1–9.

Tian F., Hou D., Hu F., Xie K., Qiao X., Li D. Appl. Surf. Sci. 2017;391:295–302.

Cai H., Yang Q., Hu Z., Duan Z., You Q., Sun J., Xu N., Wu J. Appl. Phys. Lett. 2014;104:053114.

Zazpe R., Knaut M., Sopha H., Hromadko L., Albert M., Prikryl J., Gärtnerova V., Bartha J. W., Macak J. M. Langmuir. 2016;32:10551–10558. PubMed PMC

Zazpe R., Prikryl J., Gärtnerova V., Nechvilova K., Benes L., Strizik L., Jäger A., Bosund M., Sopha H., Macak J. M. Langmuir. 2017;33:3208–3216. PubMed PMC

Das S., Zazpe R., Prikryl J., Knotek P., Krbal M., Sopha H., Podzemna V., Macak J. M. Electrochim. Acta. 2016;213:452–459.

Zheng J. W., Bhattcahrayya A., Wu P., Chen Z., Highfield J., Dong Z., Xu R. J. Phys. Chem. C. 2010;114:7063–7069.

Umebayashi T., Yamaki T., Itoh H., Asai K. Appl. Phys. Lett. 2002;81:454–456.

Lee Y.-L., Lo Y.-S. Adv. Funct. Mater. 2009;19:604–609.

Pessoa R. S., Pereira F. P., Testoni G. E., Chiappim W., Maciel H. S., Santos L. V. J. Integr. Circuits Syst. 2015;10:38–42.

Lee H. B. R., Bent S. Chem. Mater. 2012;24:279–286.

Andreev A. A., Bulanyi M. F., Golikov S. A., Mozharovsikii L. A. Russ. J. Inorg. Chem. 1995;40:1039–1042.

Kim D. W., Enomoto N., Nakagawa Z., Kawamura K. J. Am. Ceram. Soc. 1996;79:1095–1099.

A 1D conical nanotubular TiO2/CdS heterostructure with superior photon-to-electron conversion