Effective Surface Texturing of Diamond-Wire-Sawn Multicrystalline Silicon Wafers Via Crystallization of the Native Surface Amorphous Layer

Jung, Yujin; Ko, Jongwon; Bae, Soohyun; Kang, Yoonmook; Lee, Hae‐Seok; Kim, Dong Hwan

doi:10.1109/jphotov.2020.3035122

Cited by 3 publications

(4 citation statements)

References 27 publications

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“…The characteristic bands of the diamond cube c-Si (Si-I) were observed as sharp peaks at 300 and 521 cm −1 , a-Si was represented by a broad peak at 480 cm −1 , and Si III and Si XII were represented by the broad peak at ≈161 cm −1 . [35] In our previous study, [15] the a-Si layer was crystallized at temperatures exceeding 700 °C. Thus, in this study, the comparison against the reference solar cell was focused on SDGT at 800 °C, which showed the highest efficiency.…”

Section: Texturing Resultsmentioning

confidence: 99%

“…In our previous study, [ 15 ] the a‐Si layer was crystallized at temperatures exceeding 700 °C. Thus, in this study, the comparison against the reference solar cell was focused on SDGT at 800 °C, which showed the highest efficiency.…”

Section: Resultsmentioning

confidence: 99%

“…Texturing Process: For texturing, the conventional acidic solution used in this study included HF (49%), HNO 3 (70%), and DI water (with a 1:6:6.4 ratio). The temperature for uniform etching rates [2,15] was 7 ± 0.5 °C, with an etching duration of 180 s and 1% Potassium hydroxide (KOH) for 3 s. Photovoltaic SEA etching equipment was used to perform the inline texturing process. The peak spectra for the phasetransformation layer in the mc-Si wafer was analyzed using Raman spectroscopy (LabRAM ARAMIS IR2, Horiba, Ltd., Japan) with a 532 nm laser diode.…”

Section: Methodsmentioning

confidence: 99%

“…In this study, we present a method for obtaining uniform texture with an acidic solution using DWS mc‐Si with different orientations. [ 2 ] In a previous study, [ 15 ] a pre‐thermal treatment (pre‐TT) method for the mc‐Si wafers manufactured via DWS was proposed. Here, the a‐Si layer of the DWS mc‐Si wafer surface was crystallized, which increased the surface roughness of the wafer, thereby ensuring appropriate surface conditions for HF‐HNO 3 processing.…”

Section: Introductionmentioning

confidence: 99%

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A Grain Orientation‐Independent Single‐Step Saw Damage Gettering/Wet texturing Process for Efficient Silicon Solar Cells

Jung

Min

Post

et al. 2023

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Improving electrical and optical properties is important in manufacturing high‐efficiency solar cells. Previous studies focused on individual gettering and texturing methods to improve solar cell material quality and reduce reflection loss, respectively. This study presents a novel method called saw damage gettering with texturing that effectively combines both methods for multicrystalline silicon (mc‐Si) wafers manufactured using the diamond wire sawing (DWS) method. Although mc‐Si is not the Si material currently used in photovoltaic products, the applicability of this method using the mc‐Si wafers as it contains all grain orientations is demonstrated. It utilizes saw damage sites on the wafer surfaces for gettering metal impurities during annealing. Additionally, it can crystallize amorphous silicon on wafer surfaces generated during the sawing process to allow conventional acid‐based wet texturing. This texturing method and annealing for 10 min allow for the removal of metal impurities and effectively forms a textured DWS Si wafer. The results show that the open‐circuit voltage (ΔVoc = +29 mV), short‐circuit current density (ΔJsc = +2.5 mA cm−2), and efficiency (Δη = +2.1%) improved in the p‐type passivated emitter and rear cells (p‐PERC) manufactured using this novel method, as compared to those in the reference solar cells.

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Section: Texturing Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A Grain Orientation‐Independent Single‐Step Saw Damage Gettering/Wet texturing Process for Efficient Silicon Solar Cells

Jung

Min

Post

et al. 2023

Small

Self Cite

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Investigations on the Influence of Surface Textures on Optical Reflectance of Multi-crystalline Silicone (MC-Si) Crystal Surfaces-Simulations and Experiments

Ullattil¹,

Kakkarath²,

Viswambharanunnithan³

et al. 2021

Int. J. Renew. Energy Dev.

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MC-Si is the most widely used material for making solar PV cells. In spite of the considerable research on improving the conversion efficiency of MC-Si solar PV cells still it remains well within the range of 15-20%. Optical reflectance being the major loss of incident solar energy, efforts are being made to reduce the optical reflectance of solar cell surfaces. Among the several methods proposed, creation of well-defined surface topography on the cell surface remains a promising option. Micro/nano level features with various dimensions and distributions have been created on MC-Si crystal surfaces using a femto-second pulsed laser and the influence of surface topography on optical reflectance in the incident light wave length of 350 – 1000 nm have been studied and compared with the simulation results obtained using OPAL2 software. Experimental results indicate that surface textures on the wafer surface lead to the reduction of optical reflectance in the range of 20-35% in comparison with plain surface. Width of micro grooves have less significant effect on the optical reflectance in comparison with pitch between the micro grooves. Best reduction in reflectance is exhibited by the texture having a groove width of 30 mm and a pitch of 100 mm. A post texturing etching operation is found to have detrimental effect on the ability of micro/nano level features in decreasing the optical reflectance in the preferred wavelength of solar spectrum due to the flattening of nano level features created within the micro grooves due to laser texturing.

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Modeling rough surfaces as a strategy to control the crystal quality, spatial and size distribution in semiconductor nanoparticles growth: A theoretical-experimental approach

Hernández-Hernández,

Meléndez-Lira,

Rubio-Ponce

et al. 2024

MRS Communications

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Effective Surface Texturing of Diamond-Wire-Sawn Multicrystalline Silicon Wafers Via Crystallization of the Native Surface Amorphous Layer

Cited by 3 publications

References 27 publications

A Grain Orientation‐Independent Single‐Step Saw Damage Gettering/Wet texturing Process for Efficient Silicon Solar Cells

A Grain Orientation‐Independent Single‐Step Saw Damage Gettering/Wet texturing Process for Efficient Silicon Solar Cells

Investigations on the Influence of Surface Textures on Optical Reflectance of Multi-crystalline Silicone (MC-Si) Crystal Surfaces-Simulations and Experiments

Modeling rough surfaces as a strategy to control the crystal quality, spatial and size distribution in semiconductor nanoparticles growth: A theoretical-experimental approach

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