A new process for the stabilization of vertically aligned GdB₆ nanorods and their field emission properties

Abstract

<p>Display devices and electron-emitting material based on rare earth hexaborides attracted a lot of research interest due to chemical inertness and low work function. These properties make them perfect material...</p>

Single crystal growth of GdB6 by the optical floating-zone technique

“…A relatively high work function compared to those of the rare earth hexaboride family belongs to the bulk GdB 6 single crystal, while the nanostructure presents a lower work function, which is consistent with previous experimental studies. [11][12][13]…”

“…9,10 Studies showed that the cold field electron emission capability of a GdB 6 single nanowire was more than 5 times larger than that of a LaB 6 nanowire under the same conditions. [11][12][13] However, from the aspect of thermionic electron emission, GdB 6 single crystals with a large size (>5 mm in the diameter) have been investigated insufficiently and controversially up to now. The work function of GdB 6 single crystals with a large size is reported to widely range from 3.1 eV to 3.8 eV (ref.…”

Black Phosphorus/Dysprosium Hexaboride-Based Heterostructured Films for Field Emission Technologies

“…These emitted electrons can be utilized for the fabrication of display devices as well as in the characterization of materials such as electron sources in electron microscopes . Earlier, various metal oxides, metal borides, metal carbides, metal sulfides, and CNTs were used for field emission studies. − Recently, low-dimensional materials have gained much research attention due to their promising physical, chemical, and electrical properties. , Phosphorus-based 2D materials especially black phosphorus have high electrical, high thermal conductivity, and high strength as compared to their counterparts, which makes them promising candidates to be used in electronic industries, photochromic windows, photoluminescence, photonics, optoelectronic devices, catalysis, energy, and many more, which arises mostly due to the high charge mobility and low bandgap. − Depending on its thickness, BP is recognized as a material of great interest for potential applications in nanoelectronics, catalysis, energy storage devices, optics, and field emission (FE). − Earlier, the most popular methods for black phosphorus synthesis used hydrothermal, recrystallization from bismuth, high-pressure synthesis, or mercury . Recently, Tian et al synthesized nanosheets of BP in the solution phase with a large scalability and low-cost bottom-up approach .…”

“…Therefore, for the first time, a BP heterostructure has been prepared with a lower work function cathode, which has high chemical and thermal stability, and the heterostructure will easily manipulate the electronic properties . Earlier, rare-earth hexaborides such as NdB 6 , GdB 6 , LaB 6 , and CeB 6 have shown their importance for cathode materials for field emission study. Among the wide variety of rare-earth hexaboride families, DyB 6 has shown its importance in thermionic emission .…”