DEVELOPMENT AND EVALUATION OF LASER PROCESSED LIGHT MANAGEMENT INTERFACES FOR GRAPHENE/SILICON SCHOTTKY SOLAR CELLS

Download

10513106.pdf

Date

2022-12-20

Author

Avishan, Nardin

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

352
views

265
downloads

Graphene/silicon Schottky solar cells are one of the extensively studied topics during the last decade due to the high conductivity, high transparency, and mechanical flexibility properties of graphene. One of the most efficient and long-lasting methods used for performance enhancement for graphene/silicon Schottky solar cells is silicon surface texturing. It significantly increases the light absorption of silicon by controlling the incoming light through multiple interactions which is called light trapping. Rather than the well-established random pyramids, nanostructures such as freestanding nanoholes and nanowires which are applicable for thin films, are promising effective light trapping. In this thesis, three different surface texturing methods of metal-assisted chemical etching, femtosecond laser-induced periodic surface structuring, and photochemical etching are used to texture the silicon surface for graphene/silicon Schottky solar cell application. The attempt is targeting the development of laser-assisted fabrication of light management interfaces using laser-induced periodic surface structuring and photochemical etching methods. Diode-pumped solid-state high-power 532 nm CW laser and a femtosecond 1030 nm wavelength laser are used as a source for photochemical etching and laser-induced periodic surface structuring methods, respectively. In addition, the well-established metal-assisted chemical etching method is used to compare the results related to the other two methods. Partially etched and fully etched surfaces are fabricated to study the relation between the enhanced light trapping and the recombination rate of the majority carrier in presence of defects. The main finding and results show that the surfaces textured by the photochemical etching method outperform the surfaces textured by metal-assisted chemical etching and laser-induced periodic surface structuring methods.

Subject Keywords

photon management, solar cell, photochemical etching, metal-assisted chemical etching, laser texturing, graphene

URI

https://hdl.handle.net/11511/101204

Collections

Graduate School of Natural and Applied Sciences, Thesis

Suggestions

OpenMETU
Core

An Alternative Metal-Assisted Etching Route for Texturing Silicon Wafers for Solar Cell Applications Es, Fırat; Kulakci, Mustafa; Turan, Raşit (2016-03-01) Metal-assisted etching (MAE) can be used to form antireflective and light-trapping structures on crystalline silicon solar cells. This method has been widely used to form nanowires and nanoholes on their surfaces. In this study, the MAE technique with additional hole-injection mechanisms has been investigated to form surface nanostructures with various shapes. The effect of each chemical's percentage, as well as the etching time, has been studied on the surface geometry and optical performance. The average ...
Simulation of an efficient silicon heterostructure solar cell concept featuring molybdenum oxide carrier-selective contact MEHMOOD, Haris; NASSER, Hisham; Tauqeer, Tauseef; HUSSAIN, Shahzad; Ozkol, Engin; Turan, Raşit (2018-03-25) Transition metal oxides/silicon heterocontact solar cells are the subject of intense research efforts owing to their simpler processing steps and reduced parasitic absorption as compared with the traditional silicon heterostructure counterparts. Recently, molybdenum oxide (MoOx, x<3) has emerged as an integral transition metal oxide for crystalline silicon (cSi)-based solar cell based on carrier-selective contacts (CSCs). In this paper, we physically modelled the CSC-based cSi solar cell featuring MoOx/intr...
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...
Nickel assisted chemical etching for multi-crystalline Si solar cell texturing: a low cost single step alternative to existing methods Takaloo, Ashkan Vakilipour; ES, FIRAT; BAYTEMİR, Gulsen; Turan, Raşit (2018-07-01) 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...
Application of Si Nanowires Fabricated by Metal-Assisted Etching to Crystalline Si Solar Cells KULAKCI, Mustafa; ES, FIRAT; ÖZDEMİR, Baris; Ünalan, Hüsnü Emrah; Turan, Raşit (2013-01-01) Reflection and transmission through a solar cell can be significantly reduced using light-trapping structures. This approach can be applied to both crystalline and thin-film solar cells to improve the light absorption and conversion efficiency of the cell. In this study, vertically aligned Si nanowires were fabricated over a large area via a metal-assisted etching technique. Following a detailed parametric study, nanowires were applied to industrial-size (156 mm x 156 mm) Si solar cells. The reflectivity fr...

Citation Formats

N. Avishan, “DEVELOPMENT AND EVALUATION OF LASER PROCESSED LIGHT MANAGEMENT INTERFACES FOR GRAPHENE/SILICON SCHOTTKY SOLAR CELLS,” Ph.D. - Doctoral Program, Middle East Technical University, 2022.