Emission behavior of nm-thick Al2O3 film-based planar cold cathodes for electronic cooling

Lee, Myoung-Bok; Hahm, Sung-Ho; Lee, Jung-Hee; Song, Yoon-Ho
March 2005
Applied Physics Letters;3/21/2005, Vol. 86 Issue 12, p123511
Academic Journal
We have fabricated and investigated the emission characteristics of planar cold cathodes which are appropriate for the electronic cooling devices by atomically depositing ultrathin Al2O3 films onto the indium-tin-oxide-coated glass. A diode-type test indicated prominent emission behaviors, such as a low threshold field of 3–5 V/μm for planar cold cathodes and the nonuniform luminescence intensity with localized distribution of emission spots. We propose a resonant Fowler–Nordheim tunneling of electrons transported via the Frenkel traps with a well depth of [lowercase_phi_synonym]B=0.8–0.9 eV in nm-thick Al2O3 films as a key process for the extraordinary emission properties of Al2O3 film-based planar cold cathodes.


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