title: Quantum dot PbS(0.9)Se(0.1)/TiO2 heterojunction solar cells.
abstract: We report on photovoltaic cells based on ternary PbS(0.9)Se(0.1) quantum dots utilizing a heterojunction type device configuration. The best device shows an AM 1.5 power conversion efficiency of 4.25%. Furthermore, this ternary PbS(x)Se(1-x) quantum dot heterojunction device has a peak external quantum efficiency above 100% at 2.76 eV, approximately 2.7× the bandgap energy. The ternary quantum dots combine the higher short circuit currents of the binary PbSe system with the higher open circuit voltages of the binary PbS system.
authors.affiliation: Department of Electronic Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, People's Republic of China.
authors.forename: Guangmei
authors.initials: G
authors.lastname: Zhai
authors.forename: Carena P
authors.initials: CP
authors.lastname: Church
authors.forename: Alison J
authors.initials: AJ
authors.lastname: Breeze
authors.forename: Daoli
authors.initials: D
authors.lastname: Zhang
authors.forename: Glenn B
authors.initials: GB
authors.lastname: Alers
authors.forename: Sue A
authors.initials: SA
authors.lastname: Carter