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

143 Scopus citations

Abstract

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
JournalNanoscale
Volume6
Issue number3
DOIs
StatePublished - 2014
Externally publishedYes

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