Diamond surface conductivity: Properties, devices, and sensors

Abstract

Abstract

Ultrawide‐Bandgap Semiconductors: Research Opportunities and Challenges

“…These have exhibited sheet charge densities greater than 10 13 cm −2 , stability to ≈400 °C, and high-voltage and high-frequency operation. [51] The key excitonic property of diamond is its high (80 meV) exciton binding energy. Because diamond, like Ge and Si, is an indirect-bandgap semiconductor, its light emission per se is unlikely to be very efficient; however, its large exciton binding energy has enabled room-temperature UV emission from pin diodes.…”

“…For example, a high surface conductivity can be achieved with surface transfer doping due to surface adsorbates. [51] This process, illustrated in Figure 5 and discussed in more detail in Section 2.2, can lead to a two-dimensional hole gas (2DHG) with hole densities above 10 14 cm −2 . The surface transfer doping is related to surface states, surface adsorbates and defects in the dielectric layer.…”

Fluorescence and Physico-Chemical Properties of Hydrogenated Detonation Nanodiamonds

“…The hydrogenation of diamond is of great interest, as it imparts a p-type surface conductivity to bulk diamond samples [7] and also increases the electrical conductivity of detonation nanodiamonds [8]. Hydrogenated detonation nanodiamonds in particular have attracted interest for their unusual interactions with water molecules [9], the creation of free radicals in water [10,11], use as radiosensitizers [12] and their fluorescence properties [13].…”

The Use of Conducting Diamond in Electrochemistry

“…Since 1989 it has been known that the H-terminated insulating diamond surface shows a measurable conductivity [91][92][93], with p-type carriers present in an accumulation layer [94]. This was initially attributed to doping via subsurface hydrogen [95].…”