Series of polar alcohol-additives assisted improvement in the PEDOT:PSS film property and bulk-heterojunction organic solar cell performance

Yanqiong Zheng, Junle Yu, Jie Tang, Fang Yang, Chao Wang, Bin Wei, Xifeng Li, Chihaya Adachi

Research output: Contribution to journalArticle

Abstract

Doping poly(3,4-ethylenedioxythiophene):poly (styrene sulfonate) (PEDOT:PSS) by polar solvent is a promising approach to decrease the resistivity of pristine PEDOT:PSS film. In this work, properties of doped PEDOT:PSS films by a series of alcohol additives, including ethanol, glycerol, meso-erythritol, xylitol, and D-sorbitol, are comparatively studied for the first time. The absorption spectra, surface morphology, solvent contact angle, hole mobility, work function, and carrier transport properties via Hall measurement of these doped films were systematically investigated to find out the dopant dependent PEDOT:PSS film property. Then these low-resistivity PEDOT:PSS films were applied as the hole transport layer in 20 wt% poly(diketopyrro lopyrrole-terthiophene) (PDPP3T) based bulk heterojunctions (BHJs), and the highest power conversion efficiency (PCE) of 3.74% was achieved for the meso-erythritol doped PEDOT:PSS based BHJ, which is 21% higher than that (3.09%) of the pristine PEDOT:PSS based BHJ. Finally, the performance of all six BHJs is significantly improved by using lithium fluoride instead of bathocuproine, and the PCE for the meso-erythritol doped PEDOT:PSS based BHJ achieves 4.86%. Among these alcohol additives, meso-erythritol and D-sorbitol depict the optimum doping effect. Our results give important guidance to develop alcohol-additive doped PEDOT:PSS films in organic optoelectronic devices.

Original languageEnglish
Article number255104
JournalJournal of Physics D: Applied Physics
Volume52
Issue number25
DOIs
Publication statusPublished - Apr 17 2019

Fingerprint

Styrene
sulfonates
Heterojunctions
heterojunctions
polystyrene
alcohols
Alcohols
solar cells
Erythritol
Sorbitol
Doping (additives)
Conversion efficiency
Electron transport properties
Xylitol
Organic solar cells
poly(3,4-ethylene dioxythiophene)
lithium fluorides
electrical resistivity
Hole mobility
Carrier transport

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Acoustics and Ultrasonics
  • Surfaces, Coatings and Films

Cite this

Series of polar alcohol-additives assisted improvement in the PEDOT:PSS film property and bulk-heterojunction organic solar cell performance. / Zheng, Yanqiong; Yu, Junle; Tang, Jie; Yang, Fang; Wang, Chao; Wei, Bin; Li, Xifeng; Adachi, Chihaya.

In: Journal of Physics D: Applied Physics, Vol. 52, No. 25, 255104, 17.04.2019.

Research output: Contribution to journalArticle

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abstract = "Doping poly(3,4-ethylenedioxythiophene):poly (styrene sulfonate) (PEDOT:PSS) by polar solvent is a promising approach to decrease the resistivity of pristine PEDOT:PSS film. In this work, properties of doped PEDOT:PSS films by a series of alcohol additives, including ethanol, glycerol, meso-erythritol, xylitol, and D-sorbitol, are comparatively studied for the first time. The absorption spectra, surface morphology, solvent contact angle, hole mobility, work function, and carrier transport properties via Hall measurement of these doped films were systematically investigated to find out the dopant dependent PEDOT:PSS film property. Then these low-resistivity PEDOT:PSS films were applied as the hole transport layer in 20 wt{\%} poly(diketopyrro lopyrrole-terthiophene) (PDPP3T) based bulk heterojunctions (BHJs), and the highest power conversion efficiency (PCE) of 3.74{\%} was achieved for the meso-erythritol doped PEDOT:PSS based BHJ, which is 21{\%} higher than that (3.09{\%}) of the pristine PEDOT:PSS based BHJ. Finally, the performance of all six BHJs is significantly improved by using lithium fluoride instead of bathocuproine, and the PCE for the meso-erythritol doped PEDOT:PSS based BHJ achieves 4.86{\%}. Among these alcohol additives, meso-erythritol and D-sorbitol depict the optimum doping effect. Our results give important guidance to develop alcohol-additive doped PEDOT:PSS films in organic optoelectronic devices.",
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AB - Doping poly(3,4-ethylenedioxythiophene):poly (styrene sulfonate) (PEDOT:PSS) by polar solvent is a promising approach to decrease the resistivity of pristine PEDOT:PSS film. In this work, properties of doped PEDOT:PSS films by a series of alcohol additives, including ethanol, glycerol, meso-erythritol, xylitol, and D-sorbitol, are comparatively studied for the first time. The absorption spectra, surface morphology, solvent contact angle, hole mobility, work function, and carrier transport properties via Hall measurement of these doped films were systematically investigated to find out the dopant dependent PEDOT:PSS film property. Then these low-resistivity PEDOT:PSS films were applied as the hole transport layer in 20 wt% poly(diketopyrro lopyrrole-terthiophene) (PDPP3T) based bulk heterojunctions (BHJs), and the highest power conversion efficiency (PCE) of 3.74% was achieved for the meso-erythritol doped PEDOT:PSS based BHJ, which is 21% higher than that (3.09%) of the pristine PEDOT:PSS based BHJ. Finally, the performance of all six BHJs is significantly improved by using lithium fluoride instead of bathocuproine, and the PCE for the meso-erythritol doped PEDOT:PSS based BHJ achieves 4.86%. Among these alcohol additives, meso-erythritol and D-sorbitol depict the optimum doping effect. Our results give important guidance to develop alcohol-additive doped PEDOT:PSS films in organic optoelectronic devices.

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