Investigation of the Structural and Optical Properties of Silicon-Perovskite Structures with a Black Silicon Layer

Ayvazyan, Gagik; Коваленко, Д. Л.; Lebedev, M. S.; Matevosyan, L. A.; Семченко, А. В.

doi:10.1134/s1068337222030069

Cited by 16 publications

(7 citation statements)

References 25 publications

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“…In this study, we used a Cl-doped mixed-halide CH 3 NH 3 PbI 3−x Cl x perovskite as an active photoabsorber, which is characterized by low production cost, good stability, and relatively low toxicity [1][2][3][4]. The perovskite layer was deposited by the vacuum coevaporation technique in a VUP-4 chamber using inorganic lead iodide (PbI 2 ) and organic methylammonium chloride (CH 3 NH 3 Cl or MACl) as the raw precursors.…”

Section: Preparation Of Perovskite Layersmentioning

confidence: 99%

“…High-efficiency solid-state sensitized photovoltaic technology is emerging as a promising and cost-effective contender for harvesting solar power as a renewable source of energy. Recently, organic-inorganic hybrid perovskites, CH 3 NH 3 PbX 3 (X is iodine or a mixture of iodine and chlorine), have been intensively pursued as solid-state sensitizers for the traditional dye-sensitized solar cells to planar-heterojunction solar cells [1][2][3]. This class of materials possesses several advantages, such as a direct band gap of approximately 1.55 eV, a high absorption coefficient, high electron mobility, and solution processability.…”

Section: Introductionmentioning

confidence: 99%

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Photoactive Properties of Transport Sol-Gel Layers Based on Strontium Titanate for Perovskite Solar Cells

Semchenko,

Ayvazyan,

Malyutina-Bronskaya

et al. 2023

Photonics

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In this work, we have investigated the photocurrent and spectral sensitivity of the silicon/SrTiO3:xNb/perovskite structures. The sol–gel method carried out the deposition of undoped SrTiO3 layers as well as niobium-doped (SrTiO3:Nb) layers at atomic concentrations of 3 and 6% Nb. The perovskite layer, CH3NH3PbI3−xClx, has been deposited by the vacuum co-evaporation technique. The layers have been characterized by scanning electron microscopy and X-ray diffraction measurements. The volt–ampere characteristics and spectral sensitivity of the fabricated samples have been measured under illumination with selective wavelengths of 405, 450, 520, 660, 780, 808, 905, 980, and 1064 nm of laser diodes. We have shown that for different configurations of applied voltage between silicon, SrTiO3:xNb, and CH3NH3PbI3−xClx, the structures are photosensitive ones with a variation of photocurrent from microamperes to milliamperes depending on Nb concentration in SrTiO3, and the highest photocurrent and spectral sensitivity values are observed when a SrTiO3:Nb layer with 3 at.% of Nb is used. A possible application of the proposed structure with a SrTiO3:Nb layer for perovskite solar cells and photodetectors is being discussed.

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Section: Preparation Of Perovskite Layersmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Photoactive Properties of Transport Sol-Gel Layers Based on Strontium Titanate for Perovskite Solar Cells

Semchenko,

Ayvazyan,

Malyutina-Bronskaya

et al. 2023

Photonics

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“…In our recent (September 2022) study, we demonstrated that needle‐like nanotextures provide a feasible light management solution for perovskite–Si tandem solar cells. [ 38 ] Recently (October 2022), Ying et al [ 39 ] reported that nanotextured BS significantly facilitates the wetting of perovskite and acts as a nanoconfining scaffold to guide the vertical growth of perovskite. For these reasons, further investigations on the possibility and prospects of using BS in perovskite–Si tandem solar cells are very important.…”

Section: Introductionmentioning

confidence: 99%

Structural and Optical Properties of Vacuum‐Evaporated Mixed‐Halide Perovskite Layers on Nanotextured Black Silicon

Vaseashta

Ayvazyan

Khudaverdyan

et al. 2023

Physica Rapid Research Ltrs

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To improve the absorption of light in two‐junction tandem perovskite–silicon solar cells, antireflective textures are often created on the front surface in the form of micronsized pyramids using wet‐chemical etching. It is known that single‐junction silicon solar cells with nanotextured black silicon (BS) formed by dry‐etching techniques are more efficient than pyramidal microtextures. Herein, experimental evidence of enhanced efficiency of structures using BS between the perovskite layer and the silicon substrate for the first time is demonstrated. BS is fabricated using plasma‐based reactive‐ion etching on the front surface of the crystalline silicon. The deposition of mixed‐halide perovskite layers is performed by vacuum coevaporation and sequential evaporation. The structural and optical properties of evaporated perovskite layers with various thicknesses are investigated. It is found that the structural‐phase quality (viz., surface coverage, chemical composition, dimensionality, crystallinity, and phase purity) of perovskite layers on planar and nanotextured substrates is similar. However, the root mean square roughness of the perovskite layers on nanotextured substrates is much higher, which reduces the reflection significantly, especially, in the range of radiation incidence angle up to 60°. These results pave the way for the development of high‐performance perovskite–silicon tandem solar cells for improved efficiency.

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“…nanostructured forms of crystalline Si are used in the production of semiconductor devices and integrated circuits for external gettering of structural defects, enhanced doping of impurities, as well as for the formation of layers sensitive to mechanical, light, and chemical influences. [27][28][29][30][31][32][33] PSi and BSi are especially intensively studied for use as antireflective frontal surfaces for single junction [34][35][36][37] and tandem [38][39][40] solar cells.…”

Section: Introductionmentioning

confidence: 99%

NO₂ Gas Sensor Based on Pristine Black Silicon Formed by Reactive Ion Etching

Ayvazyan

Hakhoyan

et al. 2023

Physica Rapid Research Ltrs

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Nitrogen dioxide (NO2) is a serious environmental pollutant and can cause negative consequences on both human health and vegetation growth. Herein, the possibility and promise of using a resistive sensor based on pristine black silicon (BSi) to detect NO2 at room temperature are investigated. BSi is prepared using plasma‐based reactive ion etching. Scanning electron microscope (SEM) studies show that BSi consists of vertically standing nanoneedles and has a large surface area, which facilitates gas adsorption. The gas‐sensing properties of the BSi‐based sensor are tested for low NO2 concentrations (1–5 ppm). It is found that the prepared sensor samples without posttreatments of BSi exhibit high sensitivity, fast transient response, and good repeatability. In particular, the response and recovery time of the sensor are ≈35 and ≈25 s for 4 ppm NO2 gas exposure, respectively. Besides, the results indicate that the BSi‐based sensor has excellent selectivity. Finally, the sensing mechanism is discussed, the dominating factors of which are the large active sensing area and the vertical arrangement of the BSi nanoneedles. It is believed that with further optimization, BSi has good potential as a functional material for gas sensors.

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Investigation of the Structural and Optical Properties of Silicon-Perovskite Structures with a Black Silicon Layer

Cited by 16 publications

References 25 publications

Photoactive Properties of Transport Sol-Gel Layers Based on Strontium Titanate for Perovskite Solar Cells

Photoactive Properties of Transport Sol-Gel Layers Based on Strontium Titanate for Perovskite Solar Cells

Structural and Optical Properties of Vacuum‐Evaporated Mixed‐Halide Perovskite Layers on Nanotextured Black Silicon

NO₂ Gas Sensor Based on Pristine Black Silicon Formed by Reactive Ion Etching

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Investigation of the Structural and Optical Properties of Silicon-Perovskite Structures with a Black Silicon Layer

Cited by 16 publications

References 25 publications

Photoactive Properties of Transport Sol-Gel Layers Based on Strontium Titanate for Perovskite Solar Cells

Photoactive Properties of Transport Sol-Gel Layers Based on Strontium Titanate for Perovskite Solar Cells

Structural and Optical Properties of Vacuum‐Evaporated Mixed‐Halide Perovskite Layers on Nanotextured Black Silicon

NO2 Gas Sensor Based on Pristine Black Silicon Formed by Reactive Ion Etching

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Product

Resources

About

NO₂ Gas Sensor Based on Pristine Black Silicon Formed by Reactive Ion Etching