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

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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

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Keywords

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

ASJC Scopus subject areas

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

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