Room-temperature visible electroluminescence from aluminum nitride thin film embedded with aluminum nanocrystals

• Main Authors: Yang, Ming, Liu, Yang, Ding, Liang, Wong, Jen It, Liu, Zhen, Zhang, Sam, Zhang, Wali, Zhu, Fu Rong, Chen, Tupei
• 其他作者: School of Electrical and Electronic Engineering
• 格式: Article
• 語言: English
• 出版: 2010
• 主題: DRNTU::Engineering::Electrical and electronic engineering::Nanoelectronics
• 在線閱讀: https://hdl.handle.net/10356/101982; http://hdl.handle.net/10220/6410

In this brief, room-temperature visible electroluminescence (EL) from aluminum nitride (AlN) thin films containing aluminum nanocrystals (nc-Al) prepared by a radio-frequency magnetron sputtering technique is reported. The EL shows a broad spectrum peaked at 565 nm (2.19 eV) when a negative gate voltage is applied. A linear relationship between the EL and the current transport in the nc-Al/AlN thin film system is observed, and both the current transport and the EL intensity exhibit a power-law dependence on the gate voltage. These results are explained in terms of the formation of percolation networks of tunneling paths by the nc-Al arrays and the radiative recombination of the injected electrons and holes via the deep-level defects at the locations of nc-Al along the tunneling paths.