Polymer-coated graphene films as anti-reflective transparent electrodes for Schottky junction solar cells

Xin Gan, Ruitao Lv, Haoyue Zhu, Lai Peng Ma, Xuyang Wang, Zexia Zhang, Zheng Hong Huang, Hongwei Zhu, Wencai Ren, Mauricio Terrones, Feiyu Kang

Research output: Contribution to journalArticle

20 Scopus citations

Abstract

The traditional fabrication of graphene-based devices requires polymer-assisted transfer of graphene and a removal procedure of polymer coatings. Here, we propose to turn this process on its head and demonstrate a novel strategy of polymer-coated graphene as an optically antireflective and transparent electrode used in a graphene/silicon (G/Si) solar cell. No additional polymer removal and antireflection coatings (e.g. TiO2 colloids) are needed in our strategy. By engineering the thickness of polymer protective coatings, the light absorption and short-circuit current density of graphene solar cells can be greatly enhanced. We also showed that retaining the polymer coatings avoided the degradation of electrical conductivity of graphene films. With HNO3 doping applied on PMMA-coated G/Si solar cells, the PCEs can reach up to 13.34%. The long-term stabilities of HNO3 doped G/Si solar cells are also improved by using fluoropolymer (CYTOP) coatings on graphene. Our approach provides a novel fabrication method of transparent graphene electrodes for graphene-based optoelectronic devices with excellent light absorption.

Original languageEnglish (US)
Pages (from-to)13795-13802
Number of pages8
JournalJournal of Materials Chemistry A
Volume4
Issue number36
DOIs
StatePublished - Jan 1 2016

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

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    Gan, X., Lv, R., Zhu, H., Ma, L. P., Wang, X., Zhang, Z., Huang, Z. H., Zhu, H., Ren, W., Terrones, M., & Kang, F. (2016). Polymer-coated graphene films as anti-reflective transparent electrodes for Schottky junction solar cells. Journal of Materials Chemistry A, 4(36), 13795-13802. https://doi.org/10.1039/c6ta06261j