Improving efficiency of pentacene/C60 based solar cells with mixed interlayers

Kuang Teng Hung, Kuan Ta Huang, Chu Yun Hsiao, Chuan-Feng Shih

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

This work presents a modified architecture for conventional pentacene/fullerene (C60) solar cells by inserting alternately deposited C60/pentacene interlayers (∼ 1-2 nm per layer). The cell parameters, the incident photon-to-current efficiency spectra and the atomic force microscopy were used to characterize devices that had different numbers of inserting layers. The power conversion efficiency (PCE) increased markedly from 0.77 to 1.60% as the number of the inserted pairs increased from zero to three. The PCE further increased to 1.73% after post-annealing. The interlayers formed an interpenetrating network, enlarging the area over which excitons dissociate. When the number of interlayers and post-annealing conditions were optimized, the resistance and the surface roughness were minimized. When the number of pairs was increased to five, cell performance was degraded. The mechanism by which the properties of the solar cells are related to the inserted layers is presented.

Original languageEnglish
Pages (from-to)5270-5273
Number of pages4
JournalThin Solid Films
Volume519
Issue number15
DOIs
Publication statusPublished - 2011 May 31

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Materials Chemistry

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