title: Colloidal antireflection coating improves graphene-silicon solar cells.
abstract: Carbon nanotube-Si and graphene-Si solar cells have attracted much interest recently owing to their potential in simplifying manufacturing process and lowering cost compared to Si cells. Until now, the power conversion efficiency of graphene-Si cells remains under 10% and well below that of the nanotube-Si counterpart. Here, we involved a colloidal antireflection coating onto a monolayer graphene-Si solar cell and enhanced the cell efficiency to 14.5% under standard illumination (air mass 1.5, 100 mW/cm(2)) with a stable antireflection effect over long time. The antireflection treatment was realized by a simple spin-coating process, which significantly increased the short-circuit current density and the incident photon-to-electron conversion efficiency to about 90% across the visible range. Our results demonstrate a great promise in developing high-efficiency graphene-Si solar cells in parallel to the more extensively studied carbon nanotube-Si structures.
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: Hongbian
authors.initials: H
authors.lastname: Li
authors.forename: Long
authors.initials: L
authors.lastname: Yang
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: Shiting
authors.initials: S
authors.lastname: Wu
authors.forename: Xinming
authors.initials: X
authors.lastname: Li
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: Ying
authors.initials: Y
authors.lastname: Fang
authors.forename: Anyuan
authors.initials: A
authors.lastname: Cao
mesh_terms: D003102:Colloids / Q000737:chemistry; D011211:Electric Power Supplies; D006108:Graphite / Q000737:chemistry*; D037742:Nanotubes, Carbon / Q000737:chemistry; D012825:Silicon / Q000737:chemistry*; D012993:Solar Energy
chemical_list: D003102:Colloids; D037742:Nanotubes, Carbon; D006108:Graphite; D012825:Silicon