Yttrium-substituted nanocrystalline TiO 2 photoanodes for perovskite based heterojunction solar cells

Peng Qin, Anna L. Domanski, Aravind Kumar Chandiran, Rüdiger Berger, Hans-Jürgen Butt, M. Ibrahim Dar, Thomas Moehl, Nicolas Tetreault, Peng Gao, Shahzada Ahmad, Mohammad K. Nazeeruddin, Michael Grätzel

Research output: Contribution to journalArticlepeer-review

159 Scopus citations


We report the use of Y3+-substituted TiO2 (0.5%Y-TiO2) in solid-state mesoscopic solar cells, consisting of CH3NH3PbI3 as the light harvester and spiro-OMeTAD as the hole transport material. A power conversion efficiency of 11.2% under simulated AM 1.5 full sun illumination was measured. A 15% improvement in the short-circuit current density was obtained compared with pure TiO2, due to the effect of Y3+ on the dimensions of perovskite nanoparticles formed on the semiconductor surface, showing that the surface modification of the semiconductor is an effective way to improve the light harvesters' morphology and electron transfer properties in the solid-state mesoscopic solar cells. © 2013 The Royal Society of Chemistry.
Original languageEnglish (US)
Pages (from-to)1508-1514
Number of pages7
Issue number3
StatePublished - 2014
Externally publishedYes

Bibliographical note

KAUST Repository Item: Exported on 2020-10-01
Acknowledged KAUST grant number(s): KUS-C1-015-21
Acknowledgements: The authors acknowledge financial contribution from Greatcell Solar SA, Epalinges, Switzerland, the King Abdullah University of Science and Technology (KAUST, Award no. KUS-C1-015-21), the European Community's Seventh Framework Programme FP7/2007-2013) under grant agreement. no. 246124 of the SANS project, "ORION" grant agreement no. NMP-229036 and "CE-Mesolight" EPFL ECR advanced grant agreement no. 247404. MKN thanks the Global Research Laboratory (GRL) Program, Korea, and World Class University programs (Photovoltaic Materials, Department of Material Chemistry, Korea University) funded by the Ministry of Education, Science and Technology through the National Research Foundation of Korea (no. R31-2008-000-10035-0). ALD thanks the International Training Research Group 1404 (IRTG) "Self-Organized Materials for Optoelectronics" and the Deutsche Forschungsgemeinschaft (DFG) for their financial support. The authors thank Carole Gratzel, Shaik Mohammed Zakeeruddin and S. A. Shivashankar, IISC for helpful discussion.
This publication acknowledges KAUST support, but has no KAUST affiliated authors.


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