Controlling open-circuit voltage of organic photovoltaic cells by inserting thin layer of Zn-phthalocyanine at pentacene/C60 interface

Yoshiki Kinoshita, Taku Hasobe, Hideyuki Murata

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

We demonstrate organic photovoltaic cells composed of multi charge-separation (MCS) interfaces in the active layer for the improvement of power conversion efficiency (ηp). The MCS interfaces are composed of pentacene/C60 and Zn-phthalocyanine (ZnPc)/C60 by inserting thin layer of ZnPc at the CS interface between pentacene/C 60. We obtain enhanced ηp and Voc in accordance with the increased energy difference between the lowest unoccupied molecular orbital (LUMO) level of the n-type material (C60) and the HOMO level of the p-type material (ZnPc). By inserting 2nm ZnPc at the interface, both open-circuit voltage (Voc) and short-circuit current density (Jsc) have been improved simultaneously and the resulting ηp reaches 2.07%.

Original languageEnglish
Pages (from-to)1234-1237
Number of pages4
JournalJapanese Journal of Applied Physics
Volume47
Issue number2 PART 2
DOIs
Publication statusPublished - 2008 Feb 15
Externally publishedYes

Fingerprint

Photovoltaic cells
photovoltaic cells
Open circuit voltage
open circuit voltage
Molecular orbitals
polarization (charge separation)
Short circuit currents
Conversion efficiency
Current density
short circuit currents
molecular orbitals
current density
energy

Keywords

  • Multi charge separation (MCS) interfaces
  • V and J controlled independently

ASJC Scopus subject areas

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

Cite this

Controlling open-circuit voltage of organic photovoltaic cells by inserting thin layer of Zn-phthalocyanine at pentacene/C60 interface. / Kinoshita, Yoshiki; Hasobe, Taku; Murata, Hideyuki.

In: Japanese Journal of Applied Physics, Vol. 47, No. 2 PART 2, 15.02.2008, p. 1234-1237.

Research output: Contribution to journalArticle

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