Nickel assisted chemical etching for multi-crystalline Si solar cell texturing: a low cost single step alternative to existing methods

Takaloo, Ashkan Vakilipour
Turan, Raşit
The texturing of silicon surfaces is a well-known method of reducing the reflection from the surface of crystalline Si solar cell devices. With the utilization of diamond wires in recent advances in wafer slicing technology, surface texturing for the multi-crystalline Si wafers by the traditional acid-based texturing technique has become difficult. Metal-Assisted Etching (MAE) has been shown to be a promising and low-cost alternative to the traditional acid-based isotropic texturing. This paper reports, for the first time, a new single-step Ni-assisted etching technique to obtain nano-scale porous structures, that is, black silicon on multi-crystalline wafers. We observed lower reflection results in comparison with standard isotropic texturing using a standard acid solution. The structural and optical properties of the surface were identified through reflection measurements and scanning electron microscopy imaging. As a final step, the optimized texturing process was applied to multi-crystalline solar cell devices and showed promising results regarding cell performance parameters.


Radial junction solar cells prepared on single crystalline silicon wafers by metal-assisted etching
BAYTEMİR, Gulsen; ES, FIRAT; ALAGOZ, Arif Sinan; Turan, Raşit (2017-05-01)
Radial junction solar cells have been proposed as an alternative device geometry to conventional planar solar cells with its remarkable electrical and optical performance. In this geometry, densely packed nano/micropillars allow minority carrier collection in the radial direction and shorten carrier diffusion length to p-n junction. Besides, reduced reflection from surface and increased light trapping in nano/micropillars enhance solar cell efficiency. In this study, photolithography and metal-assisted etch...
Transparent thin film heaters based on silver nanowire networks
Ergün, Orçun; Ünalan, Hüsnü Emrah; Department of Metallurgical and Materials Engineering (2015)
Transparent thin film heaters are used in various de-fogging and de-icing applications because of their ability to convert electrical energy to thermal energy while allowing to transmit solar light through a surface. Indium tin oxide (ITO) is the conventional transparent conducting material used in transparent thin film heaters. However, due to scarcity of indium and its increasing prices worldwide, coupled with the inflexibility of ITO, alternative materials are being investigated. Silver nanowire networks...
Optical light management by self-arrangement of inverted tetragonal pyramids on the silicon surface through copper-assisted etching technique in a single step
Donercark, Ergi; Çolakoğlu, Tahir; Terlemezoğlu, Makbule; Abak, Musa Kurtulus; Çiftpınar, Emine Hande; Bek, Alpan; Turan, Razit (2022-09-01)
Developing efficient light trapping techniques plays a crucial role in improving silicon (Si) solar cell parameters by decreasing optical losses. Herein, four various surface morphologies by copper-assisted chemical etching (Cu-ACE) technique under various process conditions were developed. The etching solution is composed of copper nitrate trihydrate (Cu[NO3](2)), hydrofluoric acid, and hydrogen peroxide in deionized water. The systematic correlation study on the molarity of the chemical ingredients reveal...
Efficient Light Trapping in Inverted Nanopyramid Thin Crystalline Silicon Membranes for Solar Cell Applications
MAVROKEFALOS, Anastassios; HAN, Sang Eon; Yerci, Selçuk; Branham, Matthew S.; CHEN, Gang (2012-06-01)
Thin-film crystalline silicon (c-Si) solar cells with light-trapping structures can enhance light absorption within the semiconductor absorber layer and reduce material usage. Here we demonstrate that an inverted nanopyramid light-trapping scheme for c-Si thin films, fabricated at wafer scale via a low-cost wet etching process, significantly enhances absorption within the c-Si layer. A broadband enhancement in absorptance that approaches the Yablo-novitch limit (Yablo-novitch, E. J. Opt. Soc. Am. 1987, 72, ...
Periodic micro hole texturing with metal assisted chemical etching for solar cell applications: dependence of etch rate on orientation
Altınoluk, Hayriye Serra; Çiftpınar, Emine Hande; Demircioğlu, Olgu; Turan, Raşit (2017-01-01)
Surface texturing is an indispensable process for solar cell fabrication. The interaction of the surface with the incoming sunlight is controlled by texturing in such a way that the absorption is maximized through multiple interactions. Wet and dry etching techniques have been used to create textured surfaces on solar cells. Other than standard alkaline texturing used by the industry, metal assisted etching (MAE) appears to be a promising texturing technique with greater potential application for multi-crys...
Citation Formats
A. V. Takaloo, F. ES, G. BAYTEMİR, and R. Turan, “Nickel assisted chemical etching for multi-crystalline Si solar cell texturing: a low cost single step alternative to existing methods,” MATERIALS RESEARCH EXPRESS, pp. 0–0, 2018, Accessed: 00, 2020. [Online]. Available: