Efficient hole extraction from Sb2S3 heterojunction solar cells by the solid transfer of preformed PEDOT:PSS film

Jung Kyu Kim, Ganapathy Veerappan, Nansra Heo, Dong Hwan Wang, Jong Hyeok Park

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

Here, we report significant improvements of Voc and FF in Sb2S3 quantum dot (QD)-based, solid-state heterojunction solar cells prepared from the solid transfer of preformed PEDOT:PSS hole extraction layers. Despite the moderate optical properties of Sb2S3 QDs, the solid state QD solar cells suffer from poor power conversion efficiency (PCE) resulting from the disappointing Voc and the high series resistance since there is inefficient charge extraction from QDs to the metal top electrode. In order to improve the hole extraction performance, a significantly uniform PEDOT:PSS (poly(3,4-ethylenedioxythiophene)/poly(styrenesulfonate)) layer was transferred on the hole transport layer (P3HT, poly(3-hexylthiophene-2,5-diyl)) by using a simple solid-transfer method. In contrast with conventional spin-cast methods, the hydrophilic PEDOT:PSS layer was uniformly coated on the hydrophobic P3HT layer without any significant detriment to P3HT film properties. Due to improved contact surface for the Au top electrode and hole conductance resulting in significantly improved charge extraction, the power conversion efficiency was dramatically enhanced. Furthermore, the thickness of the PEDOT:PSS film was precisely optimized by layer-by-layer solid transfer, and thereby the PCE of the PEDOT:PSS solid-transfer device (30 nm) was improved by 25.7% in comparison to the PEDOT:PSS spin-cast device and by 76% in comparison to the PEDOT:PSS free device.

Original languageEnglish
Pages (from-to)22672-22677
Number of pages6
JournalJournal of Physical Chemistry C
Volume118
Issue number39
DOIs
Publication statusPublished - 2014 Oct 2

Fingerprint

Heterojunctions
heterojunctions
Solar cells
solar cells
Conversion efficiency
Semiconductor quantum dots
casts
quantum dots
Electrodes
solid state
electrodes
poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate)
Optical properties
Metals
optical properties
metals

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films

Cite this

Kim, Jung Kyu ; Veerappan, Ganapathy ; Heo, Nansra ; Wang, Dong Hwan ; Park, Jong Hyeok. / Efficient hole extraction from Sb2S3 heterojunction solar cells by the solid transfer of preformed PEDOT:PSS film. In: Journal of Physical Chemistry C. 2014 ; Vol. 118, No. 39. pp. 22672-22677.
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abstract = "Here, we report significant improvements of Voc and FF in Sb2S3 quantum dot (QD)-based, solid-state heterojunction solar cells prepared from the solid transfer of preformed PEDOT:PSS hole extraction layers. Despite the moderate optical properties of Sb2S3 QDs, the solid state QD solar cells suffer from poor power conversion efficiency (PCE) resulting from the disappointing Voc and the high series resistance since there is inefficient charge extraction from QDs to the metal top electrode. In order to improve the hole extraction performance, a significantly uniform PEDOT:PSS (poly(3,4-ethylenedioxythiophene)/poly(styrenesulfonate)) layer was transferred on the hole transport layer (P3HT, poly(3-hexylthiophene-2,5-diyl)) by using a simple solid-transfer method. In contrast with conventional spin-cast methods, the hydrophilic PEDOT:PSS layer was uniformly coated on the hydrophobic P3HT layer without any significant detriment to P3HT film properties. Due to improved contact surface for the Au top electrode and hole conductance resulting in significantly improved charge extraction, the power conversion efficiency was dramatically enhanced. Furthermore, the thickness of the PEDOT:PSS film was precisely optimized by layer-by-layer solid transfer, and thereby the PCE of the PEDOT:PSS solid-transfer device (30 nm) was improved by 25.7{\%} in comparison to the PEDOT:PSS spin-cast device and by 76{\%} in comparison to the PEDOT:PSS free device.",
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Efficient hole extraction from Sb2S3 heterojunction solar cells by the solid transfer of preformed PEDOT:PSS film. / Kim, Jung Kyu; Veerappan, Ganapathy; Heo, Nansra; Wang, Dong Hwan; Park, Jong Hyeok.

In: Journal of Physical Chemistry C, Vol. 118, No. 39, 02.10.2014, p. 22672-22677.

Research output: Contribution to journalArticle

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T1 - Efficient hole extraction from Sb2S3 heterojunction solar cells by the solid transfer of preformed PEDOT:PSS film

AU - Kim, Jung Kyu

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AB - Here, we report significant improvements of Voc and FF in Sb2S3 quantum dot (QD)-based, solid-state heterojunction solar cells prepared from the solid transfer of preformed PEDOT:PSS hole extraction layers. Despite the moderate optical properties of Sb2S3 QDs, the solid state QD solar cells suffer from poor power conversion efficiency (PCE) resulting from the disappointing Voc and the high series resistance since there is inefficient charge extraction from QDs to the metal top electrode. In order to improve the hole extraction performance, a significantly uniform PEDOT:PSS (poly(3,4-ethylenedioxythiophene)/poly(styrenesulfonate)) layer was transferred on the hole transport layer (P3HT, poly(3-hexylthiophene-2,5-diyl)) by using a simple solid-transfer method. In contrast with conventional spin-cast methods, the hydrophilic PEDOT:PSS layer was uniformly coated on the hydrophobic P3HT layer without any significant detriment to P3HT film properties. Due to improved contact surface for the Au top electrode and hole conductance resulting in significantly improved charge extraction, the power conversion efficiency was dramatically enhanced. Furthermore, the thickness of the PEDOT:PSS film was precisely optimized by layer-by-layer solid transfer, and thereby the PCE of the PEDOT:PSS solid-transfer device (30 nm) was improved by 25.7% in comparison to the PEDOT:PSS spin-cast device and by 76% in comparison to the PEDOT:PSS free device.

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