Morphological, cathodoluminescence and thermoluminescence studies of defects in diamond films grown by HF CVD technique

Paprocki, K.; Fabisiak, K.; Łoś, Szymon; Winiecki, Janusz; Malinowski, Piotr; Fabisiak, Roman; Franków, Wojciech

doi:10.1016/j.optmat.2019.109506

Cited by 8 publications

(11 citation statements)

References 24 publications

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“…We believe that single crystallites and polycrystalline diamond layers with a (100) preferential orientation can be used for the above-mentioned applications. This is confirmed by the results published in our previous work [8]. Testing of these defects is necessary and can be done using several types of measurements.…”

Section: Introductionsupporting

confidence: 81%

“…We chose diamond microcrystallites of different orientations for our research in order to study the differences in the degree of their defectiveness [8] and possible suitability for sensory applications [12]. The properties of diamond microcrystallites obtained by the HF CVD method were compared with those of a single diamond crystal purchased from Element Six.…”

Section: Methodsmentioning

confidence: 99%

“…However, this method does not provide information on the nature of these defects. Moreover, structural defects and dopants introduce disorder in the crystal lattice, and associated energy states inside the diamond energy bandgap can act as color centers responsible for luminescence in visible spectral region [8]. Thus, complementary methods for testing various defect types are photoluminescence (PL) and cathodoluminescence (CL) spectroscopy.…”

Section: Introductionmentioning

confidence: 99%

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Orientation Dependence of Cathodoluminescence and Photoluminescence Spectroscopy of Defects in Chemical-Vapor-Deposited Diamond Microcrystal

et al. 2020

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Point defects, impurities, and defect–impurity complexes in diamond microcrystals were studied with the cathodoluminescence (CL) spectroscopy in the scanning electron microscope, photoluminescence (PL), and Raman spectroscopy (RS). Such defects can influence the directions that microcrystals are grown. Micro-diamonds were obtained by a hot-filament chemical vapor deposition (HF CVD) technique from the methane–hydrogen gas mixture. The CL spectra of diamond microcrystals taken from (100) and (111) crystallographic planes were compared to the CL spectrum of a (100) oriented Element Six diamond monocrystal. The following color centers were identified: 2.52, 2.156, 2.055 eV attributed to a nitrogen–vacancy complex and a violet-emitting center (A-band) observed at 2.82 eV associated with dislocation line defects, whose atomic structure is still under discussion. The Raman studies showed that the planes (111) are more defective in comparison to (100) planes. What is reflected in the CL spectra as (111) shows a strong band in the UV region (2.815 eV) which is not observed in the case of the (100) plane.

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Section: Introductionsupporting

confidence: 81%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Orientation Dependence of Cathodoluminescence and Photoluminescence Spectroscopy of Defects in Chemical-Vapor-Deposited Diamond Microcrystal

et al. 2020

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“…Since the band-A emission behavior in homoepitaxial CVD diamond films was the same as that in polycrystalline films, this suggestion takes into account all the sp 2 defects in a model of the origin of band-A emission [ 33 ]. Our earlier work showed that the CL spectra of the CVD diamond layers strongly depend on the morphology and the preferred orientation of diamond microcrystallites [ 12 ]. Among the materials synthesized under varying conditions, there can be distinguished two types of spectra.…”

Section: Resultsmentioning

confidence: 99%

“…The diamond layers obtained by the HF CVD method are polycrystalline in nature and contain a high concentration of different defects, such as

phase admixtures, dislocations, vacancies, and dangling bonds. [ 8 , 9 , 10 , 11 , 12 ].For many semiconductors, it is known that the behavior of hydrogen is very complex, including the termination of dangling bonds, passivation of shallow and deep levels, and creation of extended defects [ 13 , 14 ]. In order to explain the high surface conductivity of diamonds, several models have been proposed.…”

Section: Introductionmentioning

confidence: 99%

The n–Si/p–CVD Diamond Heterojunction

et al. 2020

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Due to the possible applications, materials with a wide energy gap are becoming objects of interest for researchers and engineers. In this context, the polycrystalline diamond layers grown by CVD methods on silicon substrates seem to be a promising material for engineering sensing devices. The proper tuning of the deposition parameters allows us to develop the diamond layers with varying crystallinity and defect structure, as was shown by SEM and Raman spectroscopy investigations. The cathodoluminescence (CL) spectroscopy revealed defects located just in the middle of the energy gap of diamonds. The current–voltage–temperature, I−V−T characteristics performed in a broad temperature range of 77–500 K yielded useful information about the electrical conduction in this interesting material. The recorded I−V−T in the forward configuration of the n–Si/p–CVD diamond heterojunction indicated hopping trough defects as the primary mechanism limiting conduction properties. The Ohmic character of the carriers flux permitting throughout heterojunction is intensified by charges released from the depletion layer. The magnification amplitude depends on both the defect density and the probability that biasing voltage is higher than the potential barrier binding the charge. In the present work, a simple model is proposed that describes I−V−T characteristics in a wide range of voltage, even where the current saturation effect occurs.

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Thermal Annealing Effect on the Thermoluminescence Properties of Commercial High‐Pressure High‐Temperature Diamond Powders

Calderón-Martínez

Gil-Tolano²,

Cruz-Zaragoza

et al. 2022

Physica Status Solidi (a)

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Morphological, cathodoluminescence and thermoluminescence studies of defects in diamond films grown by HF CVD technique

Cited by 8 publications

References 24 publications

Orientation Dependence of Cathodoluminescence and Photoluminescence Spectroscopy of Defects in Chemical-Vapor-Deposited Diamond Microcrystal

Orientation Dependence of Cathodoluminescence and Photoluminescence Spectroscopy of Defects in Chemical-Vapor-Deposited Diamond Microcrystal

The n–Si/p–CVD Diamond Heterojunction

Thermal Annealing Effect on the Thermoluminescence Properties of Commercial High‐Pressure High‐Temperature Diamond Powders

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