Abstract
We have investigated the laser nano soldering between ZnO nanowires and the p-type GaN thin film for the realization of the hetero p-n junction with low thermal loading. When the ZnO nanowires were irradiated with 355 nm laser beam at a fluence of 0.25 J/cm2, only a tip of the nanowires was melted due to the field enhancement effect near the tip of the nanowires, and a small bead with a diameter of 40 nm was formed at the tip of each nanowires. This phenomenon was applied to solder the junction between the ZnO nanowires and a p-type GaN thin film, by irradiating the junction through the GaN film with 375 nm laser beam which is transparent for the p-type GaN thin film but opaque for the ZnO nanowires. As a result, the improvements of the I–V characteristics of the junction and the increment of the UV electro-luminescence were clearly observed, demonstrating the effectiveness of the nano soldering in fabrication of the hetero p-n junction between the ZnO nanowires and the GaN thin film.
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Shimogaki, T., Ishida, Y., Okazaki, K., Higashihata, M., Nakamura, D., Okada, T. (2014). Laser Nano-Soldering of ZnO Nanowires and GaN Thin Film for Fabrication of Hetero p-n Junction. In: Rao, M., Okada, T. (eds) ZnO Nanocrystals and Allied Materials. Springer Series in Materials Science, vol 180. Springer, New Delhi. https://doi.org/10.1007/978-81-322-1160-0_2
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DOI: https://doi.org/10.1007/978-81-322-1160-0_2
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