Cathode buffer composed of fullerene-ethylenediamine adduct for an organic solar cell

Yoshinori Kimoto, Tsuyoshi Akiyama, Katsuhiko Fujita

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

We developed a fullerene-ethylenediamine adduct (C60P-DC) for a cathode buffer material in organic bulk heterojunction solar cells, which enhance the open-circuit voltage (Voc). The evaporative spray deposition using ultra dilute solution (ESDUS) technique was employed to deposit the buffer layer onto the organic active layer to avoid damage during the deposition. By the insertion of a C60P-DC buffer layer, Voc and power conversion efficiency (PCE) were increased from 0.41 to 0.57 V and from 1.65 to 2.10%, respectively. The electron-only device with the C60P-DC buffer showed a much lower current level than that without the buffer, indicating that the Voc increase is caused not by vacuum level shift but by hole blocking. The curve fitting of current density-voltage (J-V) characteristics to the equivalent circuit with a single diode indicated that the decrease in reversed saturation current by hole blocking increased caused the Voc.

Original languageEnglish
Article number021601
JournalJapanese Journal of Applied Physics
Volume56
Issue number2
DOIs
Publication statusPublished - Feb 1 2017

Fingerprint

ethylenediamine
Buffer layers
Fullerenes
adducts
fullerenes
Cathodes
buffers
solar cells
cathodes
Curve fitting
Open circuit voltage
Equivalent circuits
Conversion efficiency
direct current
Heterojunctions
Solar cells
Diodes
Current density
Deposits
Vacuum

All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Physics and Astronomy(all)

Cite this

Cathode buffer composed of fullerene-ethylenediamine adduct for an organic solar cell. / Kimoto, Yoshinori; Akiyama, Tsuyoshi; Fujita, Katsuhiko.

In: Japanese Journal of Applied Physics, Vol. 56, No. 2, 021601, 01.02.2017.

Research output: Contribution to journalArticle

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