Intercalation of hexagonal boron nitride with potassium

Journal Article · Fri Sep 15 04:00:00 EDT 1989 · Journal of Applied Physics; (USA)

DOI:https://doi.org/10.1063/1.344219· OSTI ID:5614206

Doll, G L; Speck, J S; Dresselhaus, G; Dresselhaus, M S ^[1]; Nakamura, K ^[2]; Tanuma, S ^[3]

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1. Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (US)
2. Nihon University, Setagaya, Japan
3. Iwaki Meisei University, Fukushima, Japan

We have performed photoluminescence, photoexcitation, and transmission electron microscopy measurements on boron nitride films grown by chemical vapor deposition and later reacted with potassium. After reaction, the potassium atoms were found to intercalate the BN host and to form a (2{times}2){ital R}0{degree} in-plane structure which is commensurate with the pristine BN lattice. Optical transitions with {similar to}2.7 eV onsets were found to occur within the {similar to}5-eV BN band gap and have been interpreted as {Gamma}-point transitions between the K(4{ital s}) band and the BN(2{ital p}) bands. The absence of an appreciable shift in the {ital E}{sub 2{ital g}{sub 2}} phonon frequency of the pristine and reacted films suggests that the charge transfer between the K and BN bands is very small.

• OSTI ID: 5614206
• Journal Information: Journal of Applied Physics; (USA), Journal Name: Journal of Applied Physics; (USA) Vol. 66:6; ISSN 0021-8979; ISSN JAPIA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
ALKALI METALS
BORON COMPOUNDS
BORON NITRIDES
CHARGE TRANSPORT
CHEMICAL COATING
CHEMICAL VAPOR DEPOSITION
CLATHRATES
CRYSTAL LATTICES
CRYSTAL STRUCTURE
DEPOSITION
ELECTRON MICROSCOPY
ELEMENTS
ENERGY-LEVEL TRANSITIONS
EXCITATION
FILMS
HEXAGONAL LATTICES
LUMINESCENCE
MEDIUM TEMPERATURE
METALS
MICROSCOPY
NITRIDES
NITROGEN COMPOUNDS
PHONONS
PHOTOLUMINESCENCE
PNICTIDES
POTASSIUM
QUASI PARTICLES
RAMAN EFFECT
SURFACE COATING
TRANSMISSION ELECTRON MICROSCOPY