Article
Energy & Fuels
Hasan Huseyin Canar, Gence Bektas, Rasit Turan
Summary: In this study, the optical, chemical, and electrical properties of SiNx and SiOxNy films prepared under different process conditions were experimentally analyzed. The C-V measurements showed that SiOxNy films have lower interface state density and fixed charge density than SiNx films. Additionally, calculations on the FTIR spectra indicated that SiNx films have a significantly higher hydrogen amount compared to SiOxNy films, which is important for reducing interface traps. The passivation results obtained from PCD measurement were explained using C-V and FTIR measurements for single SiNx, single SiOxNy, and their stack layers on p-type and n-type Si wafers. The results suggest that depositing a very thin SiOxNy layer with low Dit beneath SiNx layer with high Qf and H amount provides superior passivation on p-type and n-type Si wafers, and this passivation is further improved by a subsequent fast-firing process.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2023)
Article
Materials Science, Multidisciplinary
L'ubos Podlucky, Andrej Vincze, Sona Kovacova, Juraj Chlpik, Jaroslav Kovac, Frantisek Uherek
Summary: This paper presents the analysis of SiON films deposited on silicon wafers for optical waveguides using the PECVD process, focusing on the impact of N2O flow rate. Various film properties were studied using different instruments, showing that increasing N2O flow rate led to a decrease in refractive index and an increase in deposition rate. By adjusting the gas flow rate during PECVD, the oxygen and nitrogen ratio in the SiON film could be controlled to tailor its optical properties for waveguide applications.
Article
Chemistry, Multidisciplinary
Minjee Ko, Hyeon-Seo Choi, Seong-Ho Baek, Chang-Hee Cho
Summary: In this study, the optical properties of ZnO nanoneedle arrays were investigated and found to possess broadband anti-reflection, omni-directionality, and polarization insensitivity. When a ZnO nanoneedle array was prepared on the surface of SiNx/planar Si solar cells, it resulted in a significant increase in power conversion efficiency and external quantum efficiency, as well as incident angle- and polarization-insensitive characteristics.
NANOSCALE ADVANCES
(2022)
Article
Energy & Fuels
Wenhao Chen, Josua Stuckelberger, Wenjie Wang, Sieu Pheng Phang, Daniel Macdonald, Yimao Wan, Di Yan
Summary: The research shows that gas flow ratio has a significant impact on the properties of SiOxNy layers and polysilicon passivating contact structures. An optimal N2O:SiH4:N-2 gas flow ratio can result in uniform polysilicon passivating contacts with high open-circuit voltage and low contact resistivity.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2021)
Article
Chemistry, Physical
Nashmi H. Alrasheedi
Summary: This study used PECVD to deposit a silicon nitride layer on multicrystalline silicon with and without porous silicon, aiming to enhance its properties for solar cell applications. The results showed that the application of silicon nitride reduced reflectance and improved the carrier lifetime and minority carrier diffusion length. Combining porous silicon with a SiNx thin film further improved the performance.
Article
Energy & Fuels
Jianming Ding, Shuai Zou, Chengkun Wu, Leilei Shen, Jonghyung Choi, Junhu Cui, Dichun Yuan, Hua Sun, Xiaohong Zhang, Xiaodong Su
Summary: Light management is an important method to increase the efficiency of PERC solar cells. By integrating SiOxNy and SiNx dielectric films on the front and rear surfaces, the short circuit current and internal reflection of the cells were improved, resulting in a significant increase of about 80 mA in the champion samples compared to the baseline group.
PROGRESS IN PHOTOVOLTAICS
(2022)
Article
Optics
Meili Cui, Jun Ma, Xuemei Wu
Summary: By developing high-quality multilayer SiNx:H films as anti-reflection and passivation coatings, the efficiency of industrial PERC solar cells can be improved. Simulation and experimental results showed that the four-layer SiNx:H film had the best performance, significantly increasing light absorption and short-circuit current density of the cells.
Article
Chemistry, Physical
Alexander S. Gudovskikh, Dmitri A. Kudryashov, Artem Baranov, Alexander Uvarov, Ivan A. Morozov, Anatoliy O. Monastyrenko, Alina A. Maksimova, Alexey Nashchekin, Ekaterina A. Vyacheslavova, Vladimir N. Nevedomskiy
Summary: Two different approaches, conventional PECVD and PE-ALD, were used to fabricate photoactive GaP(N) layers. The PECVD process requires strong H2 dilution and high RF power for microcrystalline GaP growth, while the PE-ALD process allows for easy control of structural properties and stoichiometric composition. Further technology development is needed to improve the defect density and quality of the doped layers for photovoltaic applications.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Materials Science, Coatings & Films
Chang-Chun Lee, Yan-Yu Liou, Che-Pei Chang, Pei-Chen Huang, Chih-Yung Huang, Kuan-Chou Chen, Yi-Jiun Lin
Summary: The residual stress in silicon nitride (SiNx) coatings deposited by plasma-enhanced chemical vapor deposition (PECVD) process can cause wafer warpage and disrupt the manufacturing process. This study presents a process-oriented simulation methodology to estimate the warpage magnitude by considering pressure and temperature distributions during PECVD process and the initial intrinsic stress of SiN(x) coating.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Liangyi Hang, Weiguo Liu, Xu Zhang, Shun Zhou, Junqi Xu, Cheng Li
Summary: A simple-operation method for designing antireflection coatings (ARCs) based on tailored refractive index characteristics of thin-film materials was developed. High-transmittance, broadband ARCs with specific refractive indices and transmittances were designed and characterized. The sensitivity of the ARCs system to manufacturing errors was simulated. The results provide valuable insights for the preparation of optical films formed via PECVD.
Article
Astronomy & Astrophysics
Dung-Sheng Tsai, Zhen-Li Huang, Wei-Chih Chang, Shiuh Chao
Summary: A study on NH3-free PECVD process was conducted to reduce cryogenic mechanical loss, and it was found that the SiN0.33H0.58 film deposited using this method exhibited the lowest extinction coefficient and lower mechanical loss peaks.
CLASSICAL AND QUANTUM GRAVITY
(2022)
Article
Engineering, Chemical
Andrey Yurkov
Summary: The physical chemistry of silicon carbide and silicon nitride materials, particularly in the context of Si3N4-SiC refractories, requires further investigation. The stress-strain behavior of these materials is more typical of composites rather than ceramics due to their composite structure. The classification of Si3N4-SiC compositions as either composite or brittle ceramic materials and the understanding of the role of silicon oxynitride Si2ON2 are also areas of scientific interest. Similarly, the understanding of the morphology of silicon nitride particles within silicon carbide grains is still lacking.
Article
Energy & Fuels
Audrey Morisset, Raphael Cabal, Valentin Giglia, Adrien Boulineau, Eric De Vito, Amal Chabli, Sebastien Dubois, Jose Alvarez, Jean-Paul Kleider
Summary: By depositing a B-rich dielectric layer and annealing it, an excellent surface passivation has been achieved with the externally doped poly-Si(B) contact, showing good quality. Gradual filling of the poly-Si layer with active B dopants with increasing annealing temperature strengthens field-effect passivation and increases open-circuit voltage after annealing to 800 degrees C.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2021)
Article
Nanoscience & Nanotechnology
Xizhe Cheng, Xiaopeng Bai, Jianhua Yang, Xiao-Ming Zhu, Jianfang Wang
Summary: The facile production of hollow and solid nitridized submicrometer titania spheres with strong and broadband light absorption properties has been achieved, allowing for mass production. These spheres have been used in a solar-driven seawater desalination system with record-breaking performance.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Rahmandhika Firdauzha Hary Hernandha, Bharath Umesh, Purna Chandra Rath, Le Thi Thu Trang, Ju-Chao Wei, Yu-Chun Chuang, Ju Li, Jeng-Kuei Chang
Summary: The lithiation/delithiation properties of alpha-Si3N4 and beta-Si3N4 are compared and the carbon coating effects are examined. Then, beta-Si3N4 at various fractions is used as the secondary phase in a Si anode to modify the electrode properties. The incorporated beta-Si3N4 decreases the crystal size of Si and introduces a new N-Si-O species at the beta-Si3N4/Si interface.
Article
Energy & Fuels
Sara Bouguerra, Kamel Agroui, Ismail Kaaya, Ahmed Bouraiou, Mohamed Redha Yaiche, Djamel Eddine Mansour
Summary: This study examines the effect of tilt and orientation angles on the rate of encapsulant browning degradation in PV modules. The results show that orienting the modules from east to west can increase their lifetime and energy production due to reduced degradation. Additionally, PV modules in the Mediterranean region of Algiers experience higher degradation due to the high humidity, compared to the Saharan region of Adrar.
IEEE JOURNAL OF PHOTOVOLTAICS
(2022)
Article
Energy & Fuels
Ahmed Bouraiou, Amina Bekraoui, Ammar Necaibia, Abdelkrim Rouabhia, Nadir Boutasseta, Seyfallah Khelifi, Sanjeevikumar Padmanaban, Baseem Khan, Mohammed Salah Bouakkaz, Issam Attoui, Rachid Dabou
Summary: This paper analyzes the defects of photovoltaic modules in a solar pumping system exposed to harsh climate conditions. The most common defects found through visual inspection include EVA discoloration and metallization corrosion, followed by front side delamination and bubbles, with cracking in solar cells being less frequent.
Article
Computer Science, Hardware & Architecture
Abderrahim Derdar, Nadia Bensiali, Mohamed Adjabi, Nadir Boutasseta, Mohammed Salah Bouakkaz, Issam Attoui, Nadir Fergani, Ahmed Bouraiou
Summary: This paper proposes a monitoring and performance optimization approach for photovoltaic energy conversion systems. An Adaptive Network Fuzzy Inference System (ANFIS) based model is used to detect abnormal operation by comparing the residual between the actual state and the output of the ANFIS model. A switching mechanism is designed to switch between maximum power extraction technique and metaheuristic algorithm based on the operation mode. Experimental results show that the proposed approach improves the efficiency of the photovoltaic energy conversion system in different environmental conditions.
SUSTAINABLE COMPUTING-INFORMATICS & SYSTEMS
(2022)
Article
Engineering, Electrical & Electronic
Nasreddine Labed, Issam Attoui, Salim Makhloufi, Ahmed Bouraiou, Mohammed Salah Bouakkaz
Summary: This paper investigates power generation management, system control, and condition monitoring techniques in wind turbine systems. A hybrid super-capacitor-battery energy storage system is proposed to support power generation, along with fractional-order PI controllers and a data-driven diagnostic strategy using the FFT algorithm. The simulation results demonstrate the effectiveness and reliability of the proposed methods.
JOURNAL OF ELECTRICAL ENGINEERING & TECHNOLOGY
(2023)
Article
Physics, Condensed Matter
Seyf Allah Khelifi, Mohamed Blal, Rachid Dabou, Abderrezzaq Ziane, Abdelkrim Rouabhia, Salah Lachtar, Mohammed Mostefaoui, Ammar Necaibia, Ahmed Bouraiou, Abdeldjalil Slimani, Boudjemaa Tidjar
Summary: The effects of intermediate bands on ZnTe(O) solar cells with oxygen defects were investigated. It was found that a higher concentration of oxygen doping can lead to a favorable influence on the conversion efficiency. By incorporating multiple intermediate band energy levels, the performance of the solar cells can be significantly improved.
PHYSICA B-CONDENSED MATTER
(2022)
Article
Green & Sustainable Science & Technology
Nordine Sahouane, Abderrezzaq Ziane, Rachid Dabou, Ammar Necaibia, Abdelkrim Rouabhia, Salah Lachtar, Mohammed Blal, Abdeldjalil Slimani, Tidjar Boudjamaa
Summary: Experimental studies were conducted to investigate the impact of sand and dust on the electrical performance of photovoltaic modules in the Adrar region. A comparison between two identical photovoltaic systems revealed that sand and dust accumulation significantly affect the electrical performance. The results showed that cleaning after sandstorms and regular cleaning every 20 days can reduce energy losses.
Article
Multidisciplinary Sciences
Mohammed Younes, Nabil Kahoul, Djamel Labed, Ammar Necaibia, Hocine Cheghib, Belhadj Chekal Affari, Zoubida Kherici
Summary: This paper analyzes the negative impact of desert climate on the performance degradation of PV panels and the accelerated degradation mechanism, using Algeria's desert as a case study. High solar irradiation and ambient temperature are identified as the main factors causing discoloration and damage to the EVA encapsulant material. The declared lifetime of PV panels in Algeria's desert climates is too optimistic.
SCIENTIFIC AFRICAN
(2023)
Article
Engineering, Electrical & Electronic
Belhadj Chekal Affari, Nabil Kahoul, Abdeslam Haouam, Hocine Cheghib, Ammar Necaibia, Mohammed Younes, Zoubida Kherici
Summary: Most studies focus on analyzing the performance degradation of solar cells or categorizing PV failure modes related to climate and cell technology. However, the impact of degradation modules on the output power of PV arrays is still unclear and has not been reported. This study aims to understand the mismatch effect on the output of aged panels in PV arrays. Measurements of photovoltaic current-voltage characteristics were conducted on 10 individual modules in a research unit. The results show a direct relation between physical degradation and output power drop, suggesting the importance of considering mismatch losses in aged PV modules.
MICROELECTRONICS RELIABILITY
(2023)
Article
Engineering, Electrical & Electronic
Lachtar Salah, Bourbia Wafa, Necaibia Ammar, Bouraiou Ahmed, Ziane Abderrezzaq
Summary: The presence of an MPPT algorithm is essential for driving a PV system to operate at its maximum power point. This paper introduces a robust MPPT technique using a double integral sliding mode controller to improve response time and reduce chattering phenomenon.
UNIVERSITY POLITEHNICA OF BUCHAREST SCIENTIFIC BULLETIN SERIES C-ELECTRICAL ENGINEERING AND COMPUTER SCIENCE
(2022)
Article
Energy & Fuels
Salem Chabachi, Ammar Necaibia, Othmane Abdelkhalek, Ahmed Bouraiou, Abderrezzaq Ziane, Messaoud Hamouda
Summary: The main purpose of this study is to examine the experimental and simulation performance of a 6 MWp grid-connected photovoltaic power plant during a specific period. The findings show that the actual data from the photovoltaic plant production closely matches the expected data collected using the PVSyst software. The study also reveals that a desert climate may demonstrate to be slightly favorable for the performance of the photovoltaic system, and environmental parameters have a significant effect on both energy generation performance and system losses.
INTERNATIONAL JOURNAL OF ENERGY AND ENVIRONMENTAL ENGINEERING
(2022)
