Carbon nanotube-silicon heterojunction solar cells with surface-textured Si and solution-processed carbon nanotube films

Eri Muramoto, Yuhei Yamasaki, Feijiu Wang, Kei Hasegawa, Kazunari Matsuda, Suguru Noda

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

Carbon nanotube (CNT)-silicon (Si) heterojunction solar cells are fabricated with surface-textured Si substrates. Using a dilute alkaline solution, common etchant in the Si solar cell industry, we formed a pyramidal texture on the Si substrate surface. The texture effectively enhances the absorption of the incident light, improving the short-circuit current density by ∼1.3-fold, up to 33.1 mA cm-2. We fabricated CNT-Si solar cells with a power conversion efficiency (PCE) of 10.4% without any anti-reflective coatings or doping of the CNTs. Moreover, the CNT films were prepared from commercialized CNT agglomerates by a mild solution-based process, which is well suited for the fabrication of CNT-Si solar cells with large area. We also achieved a PCE of 9.57% for a flat cell with careful removal of surfactant from and doping by nitric acid of the CNT films. These findings suggest that with the combination of surface-textured Si and solution-processed CNT films, efficient and low-cost CNT-Si solar cells may be realized.

Original languageEnglish
Pages (from-to)93575-93581
Number of pages7
JournalRSC Advances
Volume6
Issue number96
DOIs
Publication statusPublished - 2016

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

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