TY - JOUR
T1 - Oxide heterostructures for efficient solar cells
AU - Assmann, Elias
AU - Blaha, Peter
AU - Laskowski, Robert
AU - Held, Karsten
AU - Okamoto, Satoshi
AU - Sangiovanni, Giorgio
PY - 2013/2/11
Y1 - 2013/2/11
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=84874047255&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.110.078701
DO - 10.1103/PhysRevLett.110.078701
M3 - Article
AN - SCOPUS:84874047255
SN - 0031-9007
VL - 110
JO - Physical Review Letters
JF - Physical Review Letters
IS - 7
M1 - 078701
ER -