title: Efficiency enhancement of graphene/silicon-pillar-array solar cells by HNO3 and PEDOT-PSS.
abstract: A single-layer graphene film was grown on copper foil by chemical vapor deposition and transferred onto a silicon-pillar-array (SPA) substrate to make a Schottky junction solar cell. The SPA substrate was specifically designed to suppress reflectance and enhance light absorption. The energy conversion efficiency of the prepared graphene/SPA solar cells achieved a maximum of 2.90% with a junction area of 0.09 cm(2). HNO(3) was employed to dope the graphene in the solar cells, and the time dependence of HNO(3) treatment on the cell performance was studied. Poly(3,4-ethylenedioxythiophene) polystyrenesulfonic acid (PEDOT-PSS) was also introduced in graphene/SPA solar cells by spin coating on top of the graphene film, and its modification on the cell performance was characterized. The results show that both HNO(3) and the PEDOT-PSS film could enhance the energy conversion efficiency of graphene/SPA solar cells.
authors.affiliation: Tsinghua National Laboratory for Information Science and Technology (TNList), Institute of Microelectronics, Tsinghua University, Beijing 100084, PR China.
authors.forename: Tingting
authors.initials: T
authors.lastname: Feng
authors.forename: Dan
authors.initials: D
authors.lastname: Xie
authors.forename: Yuxuan
authors.initials: Y
authors.lastname: Lin
authors.forename: Haiming
authors.initials: H
authors.lastname: Zhao
authors.forename: Yu
authors.initials: Y
authors.lastname: Chen
authors.forename: He
authors.initials: H
authors.lastname: Tian
authors.forename: Tianling
authors.initials: T
authors.lastname: Ren
authors.forename: Xiao
authors.initials: X
authors.lastname: Li
authors.forename: Zhen
authors.initials: Z
authors.lastname: Li
authors.forename: Kunlin
authors.initials: K
authors.lastname: Wang
authors.forename: Dehai
authors.initials: D
authors.lastname: Wu
authors.forename: Hongwei
authors.initials: H
authors.lastname: Zhu
mesh_terms: D011211:Electric Power Supplies; D004735:Energy Transfer; D004867:Equipment Design; D019544:Equipment Failure Analysis; D006108:Graphite / Q000737:chemistry*; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure; D017942:Nitric Acid / Q000737:chemistry*; D011137:Polystyrenes / Q000737:chemistry*; D012825:Silicon / Q000737:chemistry*; D012993:Solar Energy; D013876:Thiophenes / Q000737:chemistry*
chemical_list: D011137:Polystyrenes; D013876:Thiophenes; C533756:poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate); D017942:Nitric Acid; D006108:Graphite; D012825:Silicon