title: Highly Asymmetric n(+)-p Heterojunction Quantum-Dot Solar Cells with Significantly Improved Charge-Collection Efficiencies.
abstract: The depletion region width of metal-oxide/quantum-dot (QD) heterojunction solar cells is increased by a new method in which heavily boron-doped n(+)-ZnO is employed. It is effectively increased in the QD layer by 30% compared to the counterpart with conventional n-ZnO, and provides 41% and 37% improvement of J(sc) (16.7 mA cm(-2) to 23.5 mA cm(-2) ) and power conversion efficiency (5.52% to 7.55%), respectively.
authors.affiliation: Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-guDaejeon, 305-701, Republic of Korea.
authors.forename: Min-Jae
authors.initials: MJ
authors.lastname: Choi
authors.affiliation: Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-guDaejeon, 305-701, Republic of Korea.
authors.forename: Sunchuel
authors.initials: S
authors.lastname: Kim
authors.affiliation: Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-guDaejeon, 305-701, Republic of Korea.
authors.forename: Hunhee
authors.initials: H
authors.lastname: Lim
authors.affiliation: Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-guDaejeon, 305-701, Republic of Korea.
authors.forename: Jaesuk
authors.initials: J
authors.lastname: Choi
authors.affiliation: Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-guDaejeon, 305-701, Republic of Korea.
authors.forename: Dong Min
authors.initials: DM
authors.lastname: Sim
authors.affiliation: Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-guDaejeon, 305-701, Republic of Korea.
authors.forename: Soonmin
authors.initials: S
authors.lastname: Yim
authors.affiliation: Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-guDaejeon, 305-701, Republic of Korea.
authors.forename: Byung Tae
authors.initials: BT
authors.lastname: Ahn
authors.affiliation: Fuel Cell Research Center, Korea Institute of Science and Technology (KIST), Seoul, 136-791, Republic of Korea.
authors.forename: Jin Young
authors.initials: JY
authors.lastname: Kim
authors.affiliation: Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-guDaejeon, 305-701, Republic of Korea.
authors.forename: Yeon Sik
authors.initials: YS
authors.lastname: Jung
keywords: colloidal quantum dots; depletion region width; heavily doping; metal oxides; solar cells