IBS Publications Repository: Low temperature synthesis of lithium-doped nanocrystalline diamond films with enhanced field electron emission properties

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Low temperature synthesis of lithium-doped nanocrystalline diamond films with enhanced field electron emission properties

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Title: Low temperature synthesis of lithium-doped nanocrystalline diamond films with enhanced field electron emission properties

Author(s): Kamatchi Jothiramalingam Sankaran; Kalpataru Panda; Ping-Yen Hsieh; Paulius Pobedinskas; Jeong Young Park; Marlies K Van Bael; Nyan-Hwa Tai; I-Nan Lin; Ken Haenen

Subject: Field electron emission, ; Lithium, ; Low temperature, ; Nanocrystalline diamond

Abstract: Low temperature (350°C) grown conductive nanocrystalline diamond (NCD) films were realized by lithium diffusion from Cr-coated lithium niobate substrates (Cr/LNO). The NCD/Cr/LNO films showed a low resistivity of 0.01 Ω·cm and excellent field electron emission characteristics, viz. a low turn-on field of 2.3 V/µm, a high-current density of 11.0 mA/cm2 (at 4.9 V/m), a large field enhancement factor of 1670, and a life-time stability of 445 min (at 3.0 mA/cm2). The low temperature deposition process combined with the excellent electrical characteristics offers a new prospective for applications based on temperature sensitive materials. © 2018 by the authors. Licensee MDPI, Basel, Switzerland