Optimization of etching time for broadband absorption enhancement in black silicon fabricated by one-step electroless silver-assisted wet chemical etching

Abdulkadir, Auwal; Aziz, Azlan Abdul; Pakhuruddin, Mohd Zamir

doi:10.1016/j.ijleo.2019.05.019

Cited by 27 publications

(12 citation statements)

References 40 publications

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“…The results express that the longer the time from 20 s to 180 s, The researchers not only used MACE to fabricate black silicon, but also explored the optimization of the preparation process [46] through experiments. When a different etching time [54,55], solution metal ion density [53], or substrate thickness are used, the fabricated black silicon sample will have different optical properties.…”

Section: Metal Assisted Chemical Etchingmentioning

confidence: 99%

Recent Progress of Black Silicon: From Fabrications to Applications

et al. 2020

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Since black silicon was discovered by coincidence, the special material was explored for many amazing material characteristics in optical, surface topography, and so on. Because of the material property, black silicon is applied in many spheres of a photodetector, photovoltaic cell, photo-electrocatalysis, antibacterial surfaces, and sensors. With the development of fabrication technology, black silicon has expanded in more and more applications and has become a research hotspot. Herein, this review systematically summarizes the fabricating method of black silicon, including nanosecond or femtosecond laser irradiation, metal-assisted chemical etching (MACE), reactive ion etching (RIE), wet chemical etching, electrochemical method, and plasma immersion ion implantation (PIII) methods. In addition, this review focuses on the progress in multiple black silicon applications in the past 10 years. Finally, the prospect of black silicon fabricating and various applications are outlined.

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Section: Metal Assisted Chemical Etchingmentioning

confidence: 99%

Recent Progress of Black Silicon: From Fabrications to Applications

et al. 2020

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“…In particular, fabrication parameters have significant effects on the morphologies and optical properties of BSi. These parameters include molarity ratios and concentrations of HF:H 2 O 2 solution, time and temperature levels of etching, and, most importantly, types of metals being used as catalysts [55,56]. This section will review three different metals (silver, copper, and nickel) along with their influences on the fabrication of BSi surfaces.…”

Section: Applied Metal Nanoparticles In the Mace Techniquementioning

confidence: 99%

“…Following a similar approach using the AgNO 3 :HF aqueous solution, Abdulkadir et al (2019) conducted fabrication of the BSi surface through a one-step MACE process [56]. However, their work was only focused on optimizing the etching time to enhance the absorption of broadband light in BSi.…”

Section: Silver (Ag)mentioning

confidence: 99%

Fabrication of Black Silicon via Metal-Assisted Chemical Etching—A Review

et al. 2021

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The metal-assisted chemical etching (MACE) technique is commonly employed for texturing the wafer surfaces when fabricating black silicon (BSi) solar cells and is considered to be a potential technique to improve the efficiency of traditional Si-based solar cells. This article aims to review the MACE technique along with its mechanism for Ag-, Cu- and Ni-assisted etching. Primarily, several essential aspects of the fabrication of BSi are discussed, including chemical reaction, etching direction, mass transfer, and the overall etching process of the MACE method. Thereafter, three metal catalysts (Ag, Cu, and Ni) are critically analyzed to identify their roles in producing cost-effective and sustainable BSi solar cells with higher quality and efficiency. The conducted study revealed that Ag-etched BSi wafers are more suitable for the growth of higher quality and efficiency Si solar cells compared to Cu- and Ni-etched BSi wafers. However, both Cu and Ni seem to be more cost-effective and more appropriate for the mass production of BSi solar cells than Ag-etched wafers. Meanwhile, the Ni-assisted chemical etching process takes a longer time than Cu but the Ni-etched BSi solar cells possess enhanced light absorption capacity and lower activity in terms of the dissolution and oxidation process than Cu-etched BSi solar cells.

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“…MACE can reduce broadband reflection of the c-Si to lower than 10%, without the need of additional ARC [5]. MACE can be carried out by two approaches; one-step and twostep processes [6]. In two-step MACE, nanoparticles (NPs) of noble metals (e.g.…”

Section: Introductionmentioning

confidence: 99%

Effects of silver nanoparticles layer thickness towards properties of black silicon fabricated by metal-assisted chemical etching for photovoltaics

2020

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This paper investigates effects of silver nanoparticles (Ag NPs) layer thickness towards properties of black silicon (b-Si) fabricated by two-step metal-assisted chemical etching for potential application in photovoltaic (PV) devices. Ag NPs with different layer thicknesses (1.3-5.1 µm) are deposited on monocrystalline silicon (mono c-Si) wafers by electroless chemical deposition in AgNO 3 /HF aqueous solution for 10-40 s. This is followed by etching in HF:H 2 O 2 :DI H 2 O aqueous solution for 20 s. Surface morphological investigation confirms presence of b-Si nanowires with height of 250-577 nm and diameter of 100-200 nm. The b-Si nanowires suppress broadband reflectance from the wafers over 300-1100 nm wavelength region, due to refractive index grading effect. Sample with Ag NPs layer thickness of 5.1 µm exhibits b-Si nanowires with average height of 577 nm and average diameter of 200 nm after etching. This sample demonstrates the lowest weighted average reflectance of 5.5% compared to other samples. This sample exhibits absorption of 96.5% at wavelength of 600 nm. The enhanced broadband light absorption leads to maximum potential short-circuit current density (J sc(max)) of 39.7 mA/cm 2 , or 51% relative enhancement compared to planar reference sample.

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Optimization of etching time for broadband absorption enhancement in black silicon fabricated by one-step electroless silver-assisted wet chemical etching

Cited by 27 publications

References 40 publications

Recent Progress of Black Silicon: From Fabrications to Applications

Recent Progress of Black Silicon: From Fabrications to Applications

Fabrication of Black Silicon via Metal-Assisted Chemical Etching—A Review

Effects of silver nanoparticles layer thickness towards properties of black silicon fabricated by metal-assisted chemical etching for photovoltaics

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