Comparison of crystal Si solar cells fabricated on p-type and n-type float zone silicon wafers

Download

index.pdf

Date

2013

Author

Bilgen, Makbule

Metadata

Show full item record

Item Usage Stats

136
views

72
downloads

Solar cells are traditionally fabricated on p-type Si substrates due to the high electron diffusion length in p-type substrate. However, high quality float zone silicon wafers provide higher carrier life time for holes in the n-type substrates, making it possible to fabricate high efficiency solar cells in this type of substrate. Superior properties of n-type substrates have created a tendency towards fabrication of n-type solar cells in photovoltaic market technology considerably. It is even forecasted that photovoltaic (PV) industry will completely shift from p-type systems to n-type systems in the near future. This technology shift leads to new research activities related to production steps since it should be optimized to get better performance of solar cells. In this work, we have focused on the development of solar cells based on n-type substrate. Several different routes have been followed and compared with each other. Comparison was made between solar cells fabricated on n- and p-type substrates having a good quality. The conditions yielding high solar cell efficiency was studied in this direction. Both the fabrication and characterization of solar cells were carried out at METU-GÜNAM facilities.

Subject Keywords

Solar cells., Photovoltaic power systems., Silicon., Silicon wafers.

URI

http://etd.lib.metu.edu.tr/upload/12616275/index.pdf
https://hdl.handle.net/11511/22781

Collections

Graduate School of Natural and Applied Sciences, Thesis

Suggestions

OpenMETU
Core

OPTIMIZATION OF SILICON-OXYNITRIDE THIN FILMS FOR CRYSTALLINE SILICON (C-Si) PERC CELL Canar, Hasan Hüseyin; Turan, Raşit; Erçelebi, Ayşe Çiğdem; Department of Physics (2022-6) PECVD deposited SiNx has been used in PV industry especially for PERC solar cell as anti-reflection coating (ARC) and passivating layer [1]. However, its limited optical and electrical properties create a barrier for achieving higher solar cell efficiencies. For that reason, an alternative is introduced that is SiOxNy thin film with adjustable refractive index can be tuned as low as SiO2 [2]. In this thesis, deposited SiNx and SiOxNy films were characterized by various measurement methods such as SE, FTIR,...
Contact resistivity analysis of different passivation layers via transmission line method measurements Kökbudak, Gamze; Turan, Raşit; Yerci, Selçuk; Department of Micro and Nanotechnology (2017) Crystalline silicon (c-Si) homojunction solar cells constitute over 90% of the current photovoltaic market. Although the standard solar cells are cost effective and easy to process, their efficiency potential is unfortunately limited. Currently, more innovative cell concepts appeared with their high efficiency potential coupled with low costs. Since the recombination at surfaces and under metal contacts is one of the major obstacles against high conversion efficiencies, surface passivation has primary impor...
Development of hole transport transparent conductive electrodes for n-type crystalline silicon solar cells Akdemir, Ozan; Bek, Alpan; İmer, Muhsine Bilge; Department of Micro and Nanotechnology (2018) Conventional transparent conductive electrodes (TCEs) used in crystal silicon (c-Si) solar cells are commonly made of indium tin oxide (ITO) which provides low sheet resistance and high transparency. However, due to indium scarcity, ITO layers increase the fabrication cost; thus, alternative TCEs, such as fluorine-doped tin oxide (FTO), zinc oxide (ZnO), metal nanowires and Oxide/Metal/Oxide (OMO) multilayers, are being investigated. Conventional solar cells also make use of doped layers, to create the junc...
Analysis of boron doped hydrogenated amorphous silicon carbide thin film for silicon heterojunction solar cells Salimi, Arghavan; Turan, Raşit; Department of Micro and Nanotechnology (2019) Silicon based solar cells are the dominant type of solar cells in the photovoltaic industry. Recently, there have been increasing efforts to develop c-Si solar cells with higher efficiency and lower cost. Among them, silicon heterojunction solar cell (SHJ) is attracting much attention because of its superior performance values demonstrated at both R&D and industrial levels. One of the common limiting criteria is the recombination at the front side which can be solved by providing proper passivation at the f...
Surface modification of multi-crystalline silicon in photovoltaic cell by laser texturing Radfar, Behrad; Turan, Raşit; Yerci, Selçuk; Department of Micro and Nanotechnology (2019) Surface of crystalline silicon solar cell plays an important role in its performance. It affects the optical properties which can be determined by surface’ reflectance. To minimize the reflection from the flat surface, thus, improve light trapping, the crystalline silicon wafers must be textured. Through the texturing process, roughness is introduced at the surface, so the incident light has a larger probability of being absorbed into the solar cell. Monocrystalline silicon solar cells can typically be text...

Citation Formats

M. Bilgen, “Comparison of crystal Si solar cells fabricated on p-type and n-type float zone silicon wafers,” M.S. - Master of Science, Middle East Technical University, 2013.