Oxide heterostructures for efficient solar cells

Elias Assmann, Peter Blaha, Robert Laskowski, Karsten Held, Satoshi Okamoto, Giorgio Sangiovanni

Research output: Contribution to journalArticlepeer-review

118 Scopus citations

Abstract

We propose an unexplored class of absorbing materials for high-efficiency solar cells: heterostructures of transition-metal oxides. In particular, LaVO3 grown on SrTiO3 has a direct band gap ∼1.1 eV in the optimal range as well as an internal potential gradient, which can greatly help to separate the photogenerated electron-hole pairs. Furthermore, oxide heterostructures afford the flexibility to combine LaVO3 with other materials such as LaFeO3 in order to achieve even higher efficiencies with band-gap graded solar cells. We use density-functional theory to demonstrate these features.

Original languageEnglish
Article number078701
JournalPhysical Review Letters
Volume110
Issue number7
DOIs
StatePublished - Feb 11 2013

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