Enhanced thermionic electron emission from a stacked structure of phosphorus‐doped diamond with a nitrogen‐doped diamond surface layer. Issue 10 (7th June 2016)

• Record Type: Journal Article
• Authors: Kataoka, M.; Morioka, N.; Kimura, Y.; Sobue, S.; Kato, H.; Takeuchi, D.; Yamasaki, S.
• Is Part Of: Physica status solidi. Volume 213:Issue 10(2016:Oct.)
• Page Start: 2650
• Page End: 2653
• Publication Date: 2016-06-07
• Subjects: diamond -- doping -- energy conversion -- nitrogen -- phosphorus -- thermionic emission; Solid state physics -- Periodicals; Solids -- Industrial applications -- Periodicals; 530.41
• DOI: 10.1002/pssa.201600173
• Languages: English
• ISSNs: 1862-6300

Abstract

Abstract : A novel stacked emitter based on phosphorus‐doped diamond with a nitrogen‐doped diamond surface layer was fabricated for enhanced thermionic emission. The emission current of the emitter was 18 mA cm −2 at 893 K and exhibited a significant increase compared to the emission current 6 mA cm −2 observed in a nitrogen‐doped emitter and 1 mA cm −2 observed in a phosphorus‐doped emitter. This remarkable emission is attributed to the reduction of the film resistance owing to the presence of a phosphorus‐doped layer and to a low effective work function with weak upward band bending owing to the presence of the nitrogen‐doped surface layer.