High-performance flexible tandem polymer solar cell employing a novel cross-linked conductive fullerene as an electron transport layer

Chih Yu Chang, Wen Kuan Huang, Yu Chia Chang, Kuan Ting Lee, Hao Yi Siao

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

A novel thermally cross-linkable, n-doped conductive fullerene material is developed by incorporating tetrabutylammonium iodide (TBAI) as the dopant into an azidofullerene derivative PCBN3. The application of TBAI-doped cross-linked PCBN3 film as the electron transport layer (ETL) in polymer solar cells (PSCs) delivers several remarkable features, including easy solution-processability, reasonable electrical conductivity (2.8 × 10-3 S cm-1), good ambient and chemical stability, fine-tunability of the work function of the electrode, wide applicability in a variety of efficient polymers, relative weak thickness-dependent performance property, and moderate cross-linking temperature (∼140 °C). With this ETL, a single-junction solar cell based on the blend of poly[[4,8-bis[(2-ethylhexyl)oxy]benzo[1,2-b:4,5-b′]dithiophene-2,6-diyl][3-fluoro-2-[(2-ethylhexyl)carbonyl]thieno[3,4-b]thiophenediyl]] (PTB7) with [6,6]-phenyl-C71-butyric acid methyl ester (PC71BM) delivers a power conversion efficiency (PCE) up to 8.8%, which is superior to that of the device with state-of-the-art ETL titanium oxide (TiOx) film. In addition, the application of using this ETL in double-junction tandem structure solar cells is also demonstrated, with a PCE exceeding 10%. More significantly, the low processing temperature of this ETL makes it compatible with the fabrication of flexible tandem solar cells, and an impressively high PCE of 9.2% is demonstrated, which represents the highest PCE ever reported for flexible PSCs.

Original languageEnglish
Pages (from-to)1869-1875
Number of pages7
JournalChemistry of Materials
Volume27
Issue number5
DOIs
Publication statusPublished - Mar 10 2015
Externally publishedYes

Fingerprint

Fullerenes
Conversion efficiency
Solar cells
Butyric acid
Butyric Acid
Titanium oxides
Chemical stability
Oxide films
Esters
Polymers
Doping (additives)
Polymer solar cells
Electron Transport
Derivatives
Fabrication
Temperature
Electrodes
Processing

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Chemistry

Cite this

High-performance flexible tandem polymer solar cell employing a novel cross-linked conductive fullerene as an electron transport layer. / Chang, Chih Yu; Huang, Wen Kuan; Chang, Yu Chia; Lee, Kuan Ting; Siao, Hao Yi.

In: Chemistry of Materials, Vol. 27, No. 5, 10.03.2015, p. 1869-1875.

Research output: Contribution to journalArticle

Chang, Chih Yu ; Huang, Wen Kuan ; Chang, Yu Chia ; Lee, Kuan Ting ; Siao, Hao Yi. / High-performance flexible tandem polymer solar cell employing a novel cross-linked conductive fullerene as an electron transport layer. In: Chemistry of Materials. 2015 ; Vol. 27, No. 5. pp. 1869-1875.
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abstract = "A novel thermally cross-linkable, n-doped conductive fullerene material is developed by incorporating tetrabutylammonium iodide (TBAI) as the dopant into an azidofullerene derivative PCBN3. The application of TBAI-doped cross-linked PCBN3 film as the electron transport layer (ETL) in polymer solar cells (PSCs) delivers several remarkable features, including easy solution-processability, reasonable electrical conductivity (2.8 × 10-3 S cm-1), good ambient and chemical stability, fine-tunability of the work function of the electrode, wide applicability in a variety of efficient polymers, relative weak thickness-dependent performance property, and moderate cross-linking temperature (∼140 °C). With this ETL, a single-junction solar cell based on the blend of poly[[4,8-bis[(2-ethylhexyl)oxy]benzo[1,2-b:4,5-b′]dithiophene-2,6-diyl][3-fluoro-2-[(2-ethylhexyl)carbonyl]thieno[3,4-b]thiophenediyl]] (PTB7) with [6,6]-phenyl-C71-butyric acid methyl ester (PC71BM) delivers a power conversion efficiency (PCE) up to 8.8{\%}, which is superior to that of the device with state-of-the-art ETL titanium oxide (TiOx) film. In addition, the application of using this ETL in double-junction tandem structure solar cells is also demonstrated, with a PCE exceeding 10{\%}. More significantly, the low processing temperature of this ETL makes it compatible with the fabrication of flexible tandem solar cells, and an impressively high PCE of 9.2{\%} is demonstrated, which represents the highest PCE ever reported for flexible PSCs.",
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AB - A novel thermally cross-linkable, n-doped conductive fullerene material is developed by incorporating tetrabutylammonium iodide (TBAI) as the dopant into an azidofullerene derivative PCBN3. The application of TBAI-doped cross-linked PCBN3 film as the electron transport layer (ETL) in polymer solar cells (PSCs) delivers several remarkable features, including easy solution-processability, reasonable electrical conductivity (2.8 × 10-3 S cm-1), good ambient and chemical stability, fine-tunability of the work function of the electrode, wide applicability in a variety of efficient polymers, relative weak thickness-dependent performance property, and moderate cross-linking temperature (∼140 °C). With this ETL, a single-junction solar cell based on the blend of poly[[4,8-bis[(2-ethylhexyl)oxy]benzo[1,2-b:4,5-b′]dithiophene-2,6-diyl][3-fluoro-2-[(2-ethylhexyl)carbonyl]thieno[3,4-b]thiophenediyl]] (PTB7) with [6,6]-phenyl-C71-butyric acid methyl ester (PC71BM) delivers a power conversion efficiency (PCE) up to 8.8%, which is superior to that of the device with state-of-the-art ETL titanium oxide (TiOx) film. In addition, the application of using this ETL in double-junction tandem structure solar cells is also demonstrated, with a PCE exceeding 10%. More significantly, the low processing temperature of this ETL makes it compatible with the fabrication of flexible tandem solar cells, and an impressively high PCE of 9.2% is demonstrated, which represents the highest PCE ever reported for flexible PSCs.

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