Selection of Material for the Back Electrodes of Thin-Film Solar Cells Using Polycrystalline Silicon Films Formed by Flash Lamp Annealing

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概要

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• Flash lamp annealing (FLA), a rapid annealing technique with a millisecond-order duration, can form polycrystalline silicon (poly-Si) films of a few µm thickness on glass substrates by crystallizing precursor amorphous Si (a-Si) films without serious thermal damage to the substrates. We attempt to use several kinds of metal films for adhesion layers inserted between the Si films and the glass substrates to prevent Si film peeling during FLA. One of the requirements for the insertion metals is a melting point (T_<melt>) higher than 1414 ℃, to which the metal films could be heated during the crystallization induced by FLA. Of the metal films attempted, only Cr films can prevent Si film peeling from soda lime glass substrates, which have a much larger thermal expansion coefficient than quartz, indicating the necessity of sufficient adhesiveness to glass and Si as well as of a high T_<melt>. Actual solar cell operation is demonstrated using a flash-lamp-crystallized poly-Si film as an absorber layer and a Cr film as a back electrode.

• 2010-04-25

著者

• Matsumura Hideki

  Japan Advanced Inst. Sci. And Technol. (jaist) Ishikawa Jpn

• Ohdaira Keisuke

  Japan Advanced Inst. Of Sci. And Technol. (jaist) Asahidai Nomi-shi Ishikawa-ken 923-1292 Jpn

• Shiba Kazuhiro

  Japan Advanced Institute Of Science And Technology (jaist)

• TAKEMOTO Hiroyuki

  Japan Advanced Institute of Science and Technology (JAIST)

• Keisuke Ohdaira

  Japan Advanced Institute of Science and Technology (JAIST), 1-1 Asahidai, Nomi, Ishikawa 923-1292, Japan

• Fujiwara Tomoko

  Japan Advanced Institute of Science and Technology (JAIST), 1-1 Asahidai, Nomi, Ishikawa 923-1292, Japan

• Endo Yohei

  Japan Advanced Institute of Science and Technology (JAIST), 1-1 Asahidai, Nomi, Ishikawa 923-1292, Japan

• Kazuhiro Shiba

  Japan Advanced Institute of Science and Technology (JAIST), 1-1 Asahidai, Nomi, Ishikawa 923-1292, Japan

• Tomoko Fujiwara

  Japan Advanced Institute of Science and Technology (JAIST), 1-1 Asahidai, Nomi, Ishikawa 923-1292, Japan

• Hideki Matsumura

  Japan Advanced Institute of Science and Technology (JAIST), 1-1 Asahidai, Nomi, Ishikawa 923-1292, Japan

関連論文

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