title: Conductive conjugated polyelectrolyte as hole-transporting layer for organic bulk heterojunction solar cells.
abstract: Poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) has been extensively used as the hole-transporting layer (HTL) in bulk heterojunction (BHJ) solar cells, however, its anisotropic electrical conduction and intrinsic acidic nature generally limit the device performance. Here we demonstrate the application of a water/alcohol soluble CPE (CPE-K) as HTLs in BHJ solar cells, achieving a PCE up to 8.2%. The more superior and uniform vertical electrical conductivity found in CPE-K reduces the series resistance and provides efficient hole extraction.
authors.affiliation: Center for Polymers and Organic Solids, University of California, Santa Barbara, Santa Barbara, CA, 93106, USA.
authors.forename: Huiqiong
authors.initials: H
authors.lastname: Zhou
authors.forename: Yuan
authors.initials: Y
authors.lastname: Zhang
authors.forename: Cheng-Kang
authors.initials: CK
authors.lastname: Mai
authors.forename: Samuel D
authors.initials: SD
authors.lastname: Collins
authors.forename: Thuc-Quyen
authors.initials: TQ
authors.lastname: Nguyen
authors.forename: Guillermo C
authors.initials: GC
authors.lastname: Bazan
authors.forename: Alan J
authors.initials: AJ
authors.lastname: Heeger
mesh_terms: D000438:Alcohols / Q000737:chemistry; D004553:Electric Conductivity; D004566:Electrodes; D004573:Electrolytes / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry*; D011137:Polystyrenes / Q000737:chemistry*; D012993:Solar Energy; D013830:Thiadiazoles / Q000737:chemistry*; D013876:Thiophenes / Q000737:chemistry*; D017971:Tin Compounds; D014867:Water / Q000737:chemistry
chemical_list: D000438:Alcohols; D004573:Electrolytes; D011108:Polymers; D011137:Polystyrenes; D013830:Thiadiazoles; D013876:Thiophenes; D017971:Tin Compounds; C533756:poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate); D014867:Water; C109984:indium tin oxide
keywords: anode interlayers; bulk heterojunctions; hole-transport layers; interface engineering; organic solar cells