P-type sp3-bonded BN/n-type Si heterodiode solar cell fabricated by laser-plasma synchronous CVD method

Shojiro Komatsu, Yuhei Sato, Daisuke Hirano, Takuya Nakamura, Kazunori Koga, Atsushi Yamamoto, Takahiro Nagata, Toyohiro Chikyo, Takayuki Watanabe, Takeo Takizawa, Katsumitsu Nakamura, Takuya Hashimoto, Masaharu Shiratani

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Abstract

A heterojunction of p-type sp3-bonded boron nitride (BN) and n-type Si fabricated by laser-plasma synchronous chemical vapour deposition (CVD) showed excellent rectifying properties and proved to work as a solar cell with photovoltaic conversion efficiency of 1.76%. The BN film was deposited on an n-type Si (1 0 0) substrate by plasma CVD from B2H6 + NH3 + Ar while doping of Si into the BN film was induced by the simultaneous irradiation of an intense excimer laser with a pulse power of 490 mJ cm-2, at a wavelength of 193 nm and at a repetition rate of 20 Hz. The source of dopant Si was supposed to be the Si substrate ablated at the initial stage of the film growth. The laser enhanced the doping (and/or diffusion) of Si into BN as well as the growth of sp3-bonded BN simultaneously in this method. P-type conduction of BN films was determined by the hot (thermoelectric) probe method. The BN/Si heterodiode with an essentially transparent p-type BN as a front layer is supposed to efficiently absorb light reaching the active region so as to potentially result in high efficiency.

Original languageEnglish
Article number225107
JournalJournal of Physics D: Applied Physics
Volume42
Issue number22
DOIs
Publication statusPublished - 2009

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Acoustics and Ultrasonics
  • Surfaces, Coatings and Films

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    Komatsu, S., Sato, Y., Hirano, D., Nakamura, T., Koga, K., Yamamoto, A., Nagata, T., Chikyo, T., Watanabe, T., Takizawa, T., Nakamura, K., Hashimoto, T., & Shiratani, M. (2009). P-type sp3-bonded BN/n-type Si heterodiode solar cell fabricated by laser-plasma synchronous CVD method. Journal of Physics D: Applied Physics, 42(22), [225107]. https://doi.org/10.1088/0022-3727/42/22/225107