Achieving high efficiency and stability in inverted organic solar cells fabricated by laminated gold leaf as top electrodes

Nur Tahirah Razali, Itaru Osaka, Kazuo Takimiya, Varun Vohra, Hideyuki Murata

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

We investigated inverted bulk heterojunction solar cells fabricated with gold (Au) leaf as laminated top electrodes. We demonstrate that the Au leaf can be successfully transferred from a supporting poly(ethylene terephthalate) (PET) substrate to the surface of poly(3,4-ethylenedioxythiophene): poly(styrene sulfonate) (PEDOT:PSS) because PEDOT:PSS has a sufficiently higher work of adhesion than PET. Under optimized lamination conditions, the contact between the Au leaf and the PEDOT:PSS becomes homogeneous, and the power conversion efficiency (PCE) improves. When a naphtho[1,2- c:5,6-c′]bis[1,2,5]thiadiazole-based polymer is used as the p-type semiconductor, the PCE reaches 5.07%. The laminated devices exhibit excellent stability comparable to that of evaporated devices.

Original languageEnglish
Pages (from-to)111602
Number of pages1
JournalApplied Physics Express
Volume7
Issue number11
DOIs
Publication statusPublished - 2014 Nov 1
Externally publishedYes

ASJC Scopus subject areas

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

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