title: Highly Efficient Inverted Perovskite Solar Cells With Sulfonated Lignin Doped PEDOT as Hole Extract Layer.
abstract: Sulfonated-acetone-formaldehyde (SAF) was grafted with alkali lignin (AL) to prepare grafted sulfonated-acetone-formaldehyde lignin (GSL). Considering the rich phenolic hydroxyl groups in GSL, we detected a hole mobility of 2.27 × 10(-6) cm(2) V(-1) s(-1) with GSL as a hole transport material by space-charge-limited current model. Compared with nonconjugated poly(styrene sulfonic acid), GSL was applied as p-type semiconductive dopant for PEDOT to prepare water-dispersed
  
  
  
  GSL.
  
  
  
  GSL shows enhanced conductivity compared with that of
  
  
  
  PSS. Simultaneously, the enhanced open-circuit voltage, short-circuit current density, and fill factor are achieved using
  
  
  
  GSL as a hole extract layer (HEL) in sandwich-structure inverted perovskite solar cells. The power conversion efficiency is increased to 14.94% compared with 12.6% of
  
  
  
  PSS-based devices. Our results show that amorphous GSL is a good candidate as dopant of PEDOT, and we provide a novel prospective for the design of HEL based on lignin, a renewable biomass and phenol derivatives.
authors.affiliation: School of Chemistry and Chemical Engineering, South China University of Technology , Guangzhou, China.|State Key Laboratory of Pulp and Paper Engineering, South China University of Technology , Guangzhou, China.
authors.forename: Ying
authors.initials: Y
authors.lastname: Wu
authors.affiliation: CAS Key Laboratory of Bio-based Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences , Qingdao 266101, China.
authors.forename: Junyi
authors.initials: J
authors.lastname: Wang
authors.affiliation: School of Chemistry and Chemical Engineering, South China University of Technology , Guangzhou, China.|State Key Laboratory of Pulp and Paper Engineering, South China University of Technology , Guangzhou, China.
authors.forename: Xueqing
authors.initials: X
authors.lastname: Qiu
authors.affiliation: CAS Key Laboratory of Bio-based Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences , Qingdao 266101, China.
authors.forename: Renqiang
authors.initials: R
authors.lastname: Yang
authors.affiliation: School of Chemistry and Chemical Engineering, South China University of Technology , Guangzhou, China.|State Key Laboratory of Pulp and Paper Engineering, South China University of Technology , Guangzhou, China.
authors.forename: Hongming
authors.initials: H
authors.lastname: Lou
authors.affiliation: CAS Key Laboratory of Bio-based Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences , Qingdao 266101, China.
authors.forename: Xichang
authors.initials: X
authors.lastname: Bao
authors.affiliation: School of Chemistry and Chemical Engineering, South China University of Technology , Guangzhou, China.|State Key Laboratory of Pulp and Paper Engineering, South China University of Technology , Guangzhou, China.
authors.forename: Yuan
authors.initials: Y
authors.lastname: Li
keywords: PEDOT:PSS; hole transport material interface engineering; lignosulfonate; organic electronic; phenol radical