Electroluminescence of Porous Silicon

Gelloz, Bernard

doi:10.1007/978-3-319-04508-5_34-1

Cited by 4 publications

(3 citation statements)

References 75 publications

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“…One of the most promising materials in this field is porous silicon (PSi), which is a widely used semiconductor with exceptional photonic [1], structural and electronic properties. Due to its unique properties and diverse structural design, PSi is an ideal candidate not only for optoelectronic devices [2,3] and novel drug delivery systems but also for chemical and biosensing applications [4][5][6][7][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Porous silicon pillar structures/photosynthetic reaction centre protein hybrid for bioelectronic applications

Hajdu

Balderas‐Valadez

Carlino

et al. 2021

Photochem Photobiol Sci

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Photosynthetic biomaterials have attracted considerable attention at different levels of the biological organisation, from molecules to the biosphere, due to a variety of artificial application possibilities. During photosynthesis, the first steps of the conversion of light energy into chemical energy take place in a pigment–protein complex, called reaction centre (RC). In our experiments photosynthetic reaction centre protein, purified from Rhodobacter sphaeroides R-26 purple bacteria, was bound to porous silicon pillars (PSiP) after the electropolymerisation of aniline onto the surface. This new type of biohybrid material showed remarkable photoactivity in terms of measured photocurrent under light excitation in an electrochemical cell. The photocurrent was found to increase considerably after the addition of ubiquinone (UQ-0), an e−-acceptor mediator of the RC. The photoactivity of the complex was found to decrease by the addition of terbutryn, the chemical which inhibits the e−-transport on the acceptor side of the RC. In addition to the generation of sizeable light-induced photocurrents, using the PSiP/RC photoactive hybrid nanocomposite material, the system was found to be sensitive towards RC inhibitors and herbicides. This highly ordered patterned 3D structure opens new solution for designing low-power (bio-)optoelectronic, biophotonic and biosensing devices. Graphical abstract

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Section: Introductionmentioning

confidence: 99%

Porous silicon pillar structures/photosynthetic reaction centre protein hybrid for bioelectronic applications

Hajdu

Balderas‐Valadez

Carlino

et al. 2021

Photochem Photobiol Sci

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“…Although porous silicon (PS) initially stimulated the interest of the scientific community due to its photo-luminescence in the visible range at room temperature, it has presently been recognized as a multifaceted optical material due to its large surface area, bio-compatibility, ease of fabrication and tunable refractive index. Applications based on porous silicon now cover various fields such as chemical sensors and biosensors [13][14][15], microelectronics and micro-mechanical systems (MEMS) [16], as well as a range of optical [17] and opto-electronic applications [18][19][20][21]. Specifically, the temporal variation of the current density results in a variation of porosity along the depth, allowing the easy fabrication of different kinds [22][23][24][25] of 1D dielectric multilayered structures.…”

Section: Introductionmentioning

confidence: 99%

Analytical Model for the Current Density in the Electrochemical Synthesis of Porous Silicon Structures with a Lateral Gradient

Ospina-Delacruz,

Agarwal,

Mochán

2021

Preprint

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Layered optical devices with a lateral gradient can be fabricated through electrochemical synthesis of porous silicon (PS) using a position dependent etching current density ( ‖ ). Predicting the local value of ( ‖ ) and the corresponding porosity ( ‖ ) and etching rate ( ‖ ) is desirable for their systematic design. We develop a simple analytical model for the calculation of ( ‖ ) within a prism shaped cell. Graded single layer PS samples were synthesized and their local calibration curves vs and vs were obtained from our model and their reflectance spectra. The agreement found between the calibration curves from different samples shows that from one sample we could obtain full calibration curves which may be used to predict, design, and fabricate more complex non-homogeneous multilayered devices with lateral gradients for manifold applications.

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“…Since the 1990s, research interest in Porous Silicon ( p -Si) has grown considerably, following reports that showed photoluminescence in the visible range 1 , 2 . Soon thereafter, research into this sponge-like material exploded as it seemingly offered new directions for the development of a wide range of optical and electro-optical applications such as optical interference filters 3 , solar panel enhancers 4 , all-optical modulator for far-IR 5 , multilayer periodic structure with photonic gap 6 , electroluminescence material 7 , Mach-Zehnder interferometer based sensors 8 , and optical biosensors 9 .…”

Section: Introductionmentioning

confidence: 99%

Reconstructing charge-carrier dynamics in porous silicon membranes from time-resolved interferometric measurements

Yurkevich

et al. 2018

Sci Rep

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We performed interferometric time-resolved simultaneous reflectance and transmittance measurements to investigate the carrier dynamics in pump-probe experiments on thin porous silicon membranes. The experimental data was analysed by using a method built on the Wentzel-Kramers-Brillouin approximation and the Drude model, allowing us to reconstruct the excited carriers’ non-uniform distribution in space and its evolution in time. The analysis revealed that the carrier dynamics in porous silicon, with ~50% porosity and native oxide chemistry, is governed by the Shockley-Read-Hall recombination process with a characteristic time constant of 375 picoseconds, whereas diffusion makes an insignificant contribution as it is suppressed by the high rate of scattering.

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Electroluminescence of Porous Silicon

Cited by 4 publications

References 75 publications

Porous silicon pillar structures/photosynthetic reaction centre protein hybrid for bioelectronic applications

Porous silicon pillar structures/photosynthetic reaction centre protein hybrid for bioelectronic applications

Analytical Model for the Current Density in the Electrochemical Synthesis of Porous Silicon Structures with a Lateral Gradient

Reconstructing charge-carrier dynamics in porous silicon membranes from time-resolved interferometric measurements

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