Quantum photoyield of diamond(111)—A stable negative-affinity emitter

Light Metals on Oxygen-Terminated Diamond (100): Structure and Electronic Properties

“…refs [29,30]), there is tentative agreement in the literature that this structure is the lowest-energy ideal C(100)-(1x1):O structure and is therefore the appropriate energetic ground state. 22,[31][32][33][34] The adsorption energy per atom is then given by: (1) where E T is the total energy of the supercell, E 0 is the total energy of the bare oxygen-terminated surface supercell, N ads is the number of adsorbates in the supercell and E iso is the energy of an isolated adsorbate atom. The computed values of E T , E O and E iso are negative, thus the sign convention in this work is that exothermic adsorption energies are negative.…”

“…The ability for certain diamond surfaces to exhibit a negative electron affinity (NEA) has been of great interest since its discovery by Himpsel in 1979. 1 The significantly increased electron yield of true NEA diamond is highly desirable for applications such as current amplifiers 2--4 , vacuum electronics 5 , thermionic converters 6 and even new forms of photochemistry 7 .…”

“…1 The significantly increased electron yield of true NEA diamond is highly desirable for applications such as current amplifiers 2--4 , vacuum electronics 5 , thermionic converters 6 and even new forms of photochemistry 7 . Furthermore, the concomitant reduction in ionization energy with increasingly negative electron affinity is critical for surface transfer doping 8--11 used in many diamond electronic devices.…”

Ultrawide‐Bandgap Semiconductors: Research Opportunities and Challenges

“…[49,255] Interest in using UWBG semiconductors for electron emission can be traced to early measurements of efficient electron emission from diamond surfaces stimulated by above-bandgap light. [256] The measurements were related to a negative electron affinity (NEA) of the hydrogen-terminated surface, and could be described by theoretical analysis of the dipole due to the CH bonding. [257] Since then, there have been many studies of electron field emission from various forms of diamond, both thin-film and single-crystal.…”

Surprising stability of neutral interstitial hydrogen in diamond and cubic BN

“…With a small lattice constant, large band gap, and negative electronic affinity [6], diamond has many properties that make it a promising electronic material. It also is the host for the nitrogen-vacancy (NV) center, which has been thoroughly investigated for applications in quantum computation, spintronics, and metrology [7].…”