title: TiO₂-coated carbon nanotube-silicon solar cells with efficiency of 15%.
abstract: Combining carbon nanotubes (CNTs), graphene or conducting polymers with conventional silicon wafers leads to promising solar cell architectures with rapidly improved power conversion efficiency until recently. Here, we report CNT-Si junction solar cells with efficiencies reaching 15% by coating a TiO₂ antireflection layer and doping CNTs with oxidative chemicals, under air mass (AM 1.5) illumination at a calibrated intensity of 100 mW/cm² and an active device area of 15 mm². The TiO₂ layer significantly inhibits light reflectance from the Si surface, resulting in much enhanced short-circuit current (by 30%) and external quantum efficiency. Our method is simple, well-controlled, and very effective in boosting the performance of CNT-Si solar cells.
authors.affiliation: Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing 100871, P. R. China.
authors.forename: Enzheng
authors.initials: E
authors.lastname: Shi
authors.forename: Luhui
authors.initials: L
authors.lastname: Zhang
authors.forename: Zhen
authors.initials: Z
authors.lastname: Li
authors.forename: Peixu
authors.initials: P
authors.lastname: Li
authors.forename: Yuanyuan
authors.initials: Y
authors.lastname: Shang
authors.forename: Yi
authors.initials: Y
authors.lastname: Jia
authors.forename: Jinquan
authors.initials: J
authors.lastname: Wei
authors.forename: Kunlin
authors.initials: K
authors.lastname: Wang
authors.forename: Hongwei
authors.initials: H
authors.lastname: Zhu
authors.forename: Dehai
authors.initials: D
authors.lastname: Wu
authors.forename: Sen
authors.initials: S
authors.lastname: Zhang
authors.forename: Anyuan
authors.initials: A
authors.lastname: Cao