Heteroepitaxial Cu2O thin film solar cell on metallic substrates

Wee, Sung Hun; Huang, Po-Shun; Lee, Jung-Kun; Goyal, Amit

doi:10.1038/srep16272

Title: Heteroepitaxial Cu₂O thin film solar cell on metallic substrates

Journal Article · Fri Nov 06 00:00:00 EST 2015 · Scientific Reports

DOI:https://doi.org/10.1038/srep16272· OSTI ID:1352751

Wee, Sung Hun ^[1]; Huang, Po-Shun ^[2]; Lee, Jung-Kun ^[2]; Goyal, Amit ^[3]

Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science and Technology Division
Univ. of Pittsburgh, PA (United States). Dept. of Mechanical Engineering and Materials Science
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science and Technology Division; State University of New York (SUNY), Buffalo, NY (United States). Research and Education in Energy, Environment & Water (RENEW), Department of Chemical & Biological Engineering, Department of Materials Design & Innovation, and Department of Electrical Engineering and Physics

Heteroepitaxial, single-crystal-like Cu₂O films on inexpensive, flexible, metallic substrates can potentially be used as absorber layers for fabrication of low-cost, high-performance, non-toxic, earth-abundant solar cells. Here, we report epitaxial growth of Cu₂O films on low cost, flexible, textured metallic substrates. Cu₂O films were deposited on the metallic templates via pulsed laser deposition under various processing conditions to study the influence of processing parameters on the structural and electronic properties of the films. It is found that pure, epitaxial Cu₂O phase without any trace of CuO phase is only formed in a limited deposition window of P(O₂) - temperature. The (00l) single-oriented, highly textured, Cu₂O films deposited under optimum P(O₂) - temperature conditions exhibit excellent electronic properties with carrier mobility in the range of 40-60 cm² V^-1 s^-1 and carrier concentration over 10¹⁶ cm^-3. The power conversion efficiency of 1.65% is demonstrated from a proof-of-concept Cu₂O solar cell based on epitaxial Cu₂O film prepared on the textured metal substrate.

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Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 1352751

Journal Information:: Scientific Reports, Vol. 5, Issue 1; ISSN 2045-2322

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 42 works

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