Graphite distributed electrodes for diamond-based photon-enhanced thermionic emission solar cells

Girolami, M.; Criante, Luigino; Fonzo, Fabio Di; Turco, Sara Lo; Mezzetti, Alessandro; Notargiacomo, A.; Pea, Marialilia; Bellucci, A.; Calvani, P.; Valentini, Veronica; Trucchi, Daniele M.

doi:10.1016/j.carbon.2016.09.061

Cited by 68 publications

(53 citation statements)

References 22 publications

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“…The above datum reveals that the top surface of the diamond has been converted to graphite. When the laser irradiation is increased to 1.7 J cm −2 , the diamond Raman peak reduces significantly, and another peak at around 1350 cm −1 appears, which can be attributed to the D peak of graphite . When the laser energy density is increased to 2.6 J cm −2 , the Raman peak of diamond disappears, indicating that the diamond on the surface of the wafer has been graphitized.…”

Section: Resultsmentioning

confidence: 99%

“…It is well known that graphite has high conductivity thus can be used as electrodes, while diamond can be employed as the active layer of solar‐blind photodetectors. It has been reported that diamond can be converted to graphite by strong laser irradiation . Thus, graphical electrodes can be drawn by laser‐induced local graphitization progress of diamond, but the report on diamond photodetectors employing graphite as electrodes is still rare.…”

Section: Introductionmentioning

confidence: 99%

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Diamond‐Based All‐Carbon Photodetectors for Solar‐Blind Imaging

Lin

Shan

et al. 2018

Advanced Optical Materials

134

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Single‐crystalline diamond wafers are synthesized, and all‐carbon solar‐blind photodetectors are constructed based on the diamond with interdigitated graphite as electrodes. The graphite electrodes are made by laser‐induced graphitization of the diamond. The peak responsivity of the photodetector is 21.8 A W−1, and detectivity is 1.39 × 1012 cm Hz1/2 W−1 when the bias voltage is 50 V, it is noted that both of these are among the best values ever reported for diamond‐based photodetectors. The photodetectors are employed as the sensing pixels in an imaging system, and a clear image is obtained, which is the first report on solar‐blind imaging of diamond photodetectors. The results reported in this paper provide a facile approach to high‐performance diamond solar‐blind photodetectors and their applications in solar‐blind imaging, thus may address a significant step toward the preparation and application of diamond photodetectors.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Diamond‐Based All‐Carbon Photodetectors for Solar‐Blind Imaging

Lin

Shan

et al. 2018

Advanced Optical Materials

134

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“…Indeed, even if it is assumed that all the regions identified as sp 2 are continuous along the wire and can hence contribute to any DC conductivity, values for the intrinsic structural resistivity are expected to be over an order of magnitude lower than those previously reported for laser written wires. [18][19][20]25,26 The relatively low sp 2 content of even the patches in Fig. 3(e) is surprising, and at no point, purely graphenic EELS spectra are recorded.…”

mentioning

confidence: 91%

“…13,15 Regime (ii) enables the creation of embedded electrodes, particularly for use in 3D radiation detectors offering a superior radiation tolerance and a faster response than their planar counterparts. [16][17][18] Furthermore, Regime (ii) modifications provide a potential route for all-carbon metamaterials, 19 solar cells, 20 photonic crystals, 21 and waveguides. 22,23 For successful development of DLW in these applications and other diamond based technologies, it is of vital importance to carry out detailed structural analysis of the subsurface laser induced changes to the diamond.…”

mentioning

confidence: 99%

“…The pulse energy has to be low to avoid any surface damage and a high degree of axial confinement is necessary for the subsequent processing, precluding the use of an axial multi-scan fabrication technique to improve the wire conductivity. 20,25 Cross-sections of wires were extracted by using standard "lift-out" protocols (e.g., see Ref. 29) on an FEI Nova DualBeam Focused Ion Beam (FIB) microscope.…”

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confidence: 99%

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High resolution structural characterisation of laser-induced defect clusters inside diamond

Salter

Booth

Courvoisier

et al. 2017

Applied Physics Letters

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Laser writing with ultrashort pulses provides a potential route for the manufacture of three-dimensional wires, waveguides, and defects within diamond. We present a transmission electron microscopy study of the intrinsic structure of the laser modifications and reveal a complex distribution of defects. Electron energy loss spectroscopy indicates that the majority of the irradiated region remains as sp3 bonded diamond. Electrically conductive paths are attributed to the formation of multiple nano-scale, sp2-bonded graphitic wires and a network of strain-relieving micro-cracks.

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Giant Photon‐Drag‐Induced Ultrafast Photocurrent in Diamond for Nonlinear Photonics

Xue,

Du,

Tao

et al. 2024

Laser & Photonics Reviews

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Diamond is emerging as an attractive third‐generation wide‐bandgap semiconductor for future on‐chip nonlinear photonics and quantum optics due to its unique thermal, optical, and mechanical properties. However, the light‐driven current under below‐band gap excitation from the second‐order nonlinear optical effect in diamond is still challenging. Herein, a giant second‐order nonlinear photocurrent is observed in the chemical vapor deposition (CVD) diamond by utilizing terahertz (THz) emission spectroscopy. This ultrafast photocurrent originates from the photon drag effect (PDE), during which the momentum transfer from the incident photons to the charge carriers at the rich grain boundaries of the CVD diamond after the exclusive subgap π–π* transition upon femtosecond laser excitation. Especially, the interplay between circular and linear PDE to the THz generation is clarified and distinguished under elliptically polarized light excitation. Furthermore, the picosecond ultrafast dynamics of these charge carriers are also verified by infrared spectroscopy. Owing to the giant photon‐drag‐induced ultrafast photocurrent, the CVD diamond presents the highest THz emission efficiency compared with the reported carbon allotropes, which expands the new functionality of diamond nonlinear photonics into on‐chip THz devices.

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Graphite distributed electrodes for diamond-based photon-enhanced thermionic emission solar cells

Cited by 68 publications

References 22 publications

Diamond‐Based All‐Carbon Photodetectors for Solar‐Blind Imaging

Diamond‐Based All‐Carbon Photodetectors for Solar‐Blind Imaging

High resolution structural characterisation of laser-induced defect clusters inside diamond

Giant Photon‐Drag‐Induced Ultrafast Photocurrent in Diamond for Nonlinear Photonics

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