Hexagonal Boron Nitride as a New Ultraviolet Luminescent Material and Its Application

Abstract

Hexagonal boron nitride (hBN), which is conventionally used as one of the best‐known heat‐resistant materials due to its high thermal and chemical stability, has recently been found as a highly luminous material in the far‐ultraviolet (FUV) region. This paper reviews the recent studies of hBN growth, optical properties, and device application development. In the case of highly pure crystals of hBN grown by the solvent growth method, the electronic excitation states near the band gap are governed by optically allowed exciton effects, which originate from the Jahn–Teller effect on the exciton series. The excitonic luminescence bands are utilized for an FUV plane light‐emitting device excited by field emitters to take advantage of the highly luminous character.

Optical Properties of (Oxy)Nitride Materials: A Review

“…For example, high brightness GaN‐based blue LEDs have been commercialized, and are now widely used in white LEDs for general illumination and liquid crystal display backlights . AlN and BN have been reported to show intense UV luminescence, and are potentially used in UV LEDs for air‐ and water purification, germicidal, and biomedical instrumentation systems . There are numerous articles devoted to the topics of luminescence in group III nitrides, so their luminescence properties are not included in this article.…”

“…(Oxy)Nitride Materials reported to show intense UV luminescence, and are potentially used in UV LEDs for air-and water purification, germicidal, and biomedical instrumentation systems. 46,48,[192][193][194][195][196][197][198][199][200] There are numerous articles devoted to the topics of luminescence in group III nitrides, so their luminescence properties are not included in this article. What we will discuss is the photoluminescence of covalent nitrides and oxynitrides with the crystal structure built up on the three-dimensional (Si,Al)(O,N) 4 tetrahedral network.…”

Two-dimensional excitons in three-dimensional hexagonal boron nitride

“…[5][6][7][8][9] However, these materials possess high crystalline quality and can serve as a benchmark for the understanding of the basic optical properties as well as for the development of wafer-size crystals of hBN. We present here the results of studies on exciton recombination dynamics in hBN bulk crystals probed by DUV time-resolved photoluminescence (PL) spectroscopy.…”

“…[1][2][3][4][5][6][7][8][9] Due to its similar in-plane lattice constant to graphene and chemical inertness and resistance to oxidation, hBN is also considered as the ideal template and gate dielectric layer in graphene electronics. [10][11][12][13][14][15][16][17] Lasing action in deep ultraviolet (DUV) region ($225 nm) by electron beam pumping was demonstrated in millimeter size hBN bulk crystals, 5 revealing its potential for realizing semiconductor DUV light sources.…”

Theoretical investigation of the electronic and magnetic properties of TM (TM=Ti, V, and Cr)-doped w-BN compound

“…BN has a broad range of potential applications, such as in high-temperature ceramic material that can withstand an extremely harsh environment, radio frequency and high-frequency high-power laser diodes, light-emitting diodes operating in the ultraviolet region, solar detectors, field-effect transistors, and high electron mobility transistors [10][11][12][13][14][15]. Owing to the variable bonding character, BN can exist in different crystallographic phases, such as zincblende (cubic) boron nitride (c-BN) [16][17][18], wurtzite (w) boron nitride (w-BN) [17,19,20], hexagonal (h) boron nitride (h-BN) [4,5], and rhombohedral (r) boron nitride (r-BN) [1,2].…”