Article
Energy & Fuels
Robert Witteck, Susanne Blankemeyer, Michael Siebert, Marc Koentges, Henning Schulte-Huxel
Summary: By experimentally verified modeling, this study examines the electrical and thermal characteristics of a photovoltaic module with three-terminal cell interconnection when partially shading a solar cell. The 3T architecture combines the advantages of 2T and 4T cells without their drawbacks, showing better performance and stability in simulations and experiments.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2021)
Article
Energy & Fuels
Tomihisa Tachibana, Katsuhiko Shirasawa, Katsuto Tanahashi
Summary: Lightweight and flexible solar cell modules have great potential to be installed in locations with loading limitations and to expand the photovoltaics market. The use of polyethylene terephthalate films instead of thick glass cover as front cover materials allows for the fabrication of lightweight modules with crystalline silicon solar cells. Accelerated degradation tests demonstrated that these lightweight and flexible modules exhibit high reliability under both high temperature and high humidity conditions.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2023)
Article
Energy & Fuels
Jian Yu, Peris Sunny Leonard, Depeng Qiu, Yilin Zhao, Andreas Lambertz, Christoph Zahren, Lauterbach Volker, Weiyuan Duan, Junsheng Yu, Kaining Ding
Summary: This study evaluated the light soaking stress on glass/back sheet structure modules with different encapsulant materials and found that the SHJ solar modules with different encapsulant materials showed excellent light induced reliability. The LID-free SHJ solar cells have the potential to reduce the levelized cost of energy for photovoltaic power generation.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2022)
Article
Agronomy
Zhiliang Kang, Jinping Geng, Rongsheng Fan, Yan Hu, Jie Sun, Youli Wu, Lijia Xu, Cheng Liu
Summary: This study conducted a nondestructive detection method for mango dry matter based on hyperspectral fluorescence imaging technology, used various algorithms to extract feature variables, and constructed predictive models to achieve the best prediction performance.
Article
Spectroscopy
Xin Zhou, Chunjiang Zhao, Jun Sun, Kunshan Yao, Min Xu, Jiehong Cheng
Summary: This study evaluated the feasibility of nondestructive testing and visualization of compound heavy metals (cadmium and lead) in lettuce leaves using fluorescence hyperspectral imaging. A method involving wavelet transform and stepwise regression (WT-SR) was proposed to perform dimensionality reduction of fluorescence spectral data. The results showed that the MLR models based on the feature data obtained by 1st Der-WT-SR achieved reasonable performance for Cd and Pb content detection in lettuce leaves, confirming the great potential of fluorescence hyperspectral technology combined with optimization algorithm for the detection of compound heavy metals.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2023)
Article
Energy & Fuels
J. Veirman, J. S. Caron, P. Jeronimo, T. Gageot, J. Kinfack-Leoga, A. S. Ozanne, S. De Vecchi, R. Soulas, W. Favre, A. Ragonesi, L. Carbone, M. Sciuto, A. Voltan
Summary: This study aims to develop a fast post-treatment method to improve the performance of Enel Green Power (EGP) solar cells. By using a specially designed LED tool for HJT cells, the treatment's impact on performance and reliability is investigated, and potential additional benefits are assessed.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2022)
Article
Spectroscopy
Zhiyong Zou, Qingsong Wu, Jian Wang, Lijia Xu, Man Zhou, Zhiwei Lu, Yong He, Yuchao Wang, Bi Liu, Yongpeng Zhao
Summary: A modeling experiment method using fluorescence hyperspectral technology combined with machine learning algorithm was proposed for rapid nondestructive testing of hotpot oil quality. Preprocessing algorithms were employed to preprocess the original spectral data, achieving data denoising and reducing the influence of baseline drift and tilt. The best feature bands for the two-classification model and the six-classification model were identified, and the results showed that the fluorescence hyperspectral technology combined with machine learning algorithm could effectively realize the detection of reused hotpot oil.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2023)
Article
Energy & Fuels
Andrew Fairbrother, Luca Gnocchi, Christophe Ballif, Alessandro Virtuani
Summary: Corrosion is a major degradation and failure mode in photovoltaic modules, but its progression is gradual. Researchers have developed an accelerated aging test to study the behavior of acetic acid corrosion and assist in screening new PV materials and component technologies.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2022)
Review
Materials Science, Multidisciplinary
Yanlin Li, Zhu Ma, Shanyue Hou, Qianyu Liu, Guangyuan Yan, Xiaoshan Li, Tangjie Yu, Zhuowei Du, Junbo Yang, Yi Chen, Wei You, Qiang Yang, Yan Xiang, Shufang Tang, Xuelin Yue, Meng Zhang, Wenfeng Zhang, Jian Yu, Yuelong Huang, Jiale Xie, Chun Tang, Yaohua Mai, Kuan Sun
Summary: This paper provides an overview of hydrogen progress from solar energy to solar cells, with a focus on photovoltaic-electrolysis and photoelectrochemical/photovoltaic systems. Both systems have achieved a solar-to-hydrogen efficiency of over 10% and show great potential for large-scale application. The challenges and opportunities in this field, including configuration design, electrode materials, and performance evaluation, are summarized. The paper also analyzes and presents perspectives on the potential commercial application and further scientific research for the development of solar-to-hydrogen.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2024)
Article
Engineering, Electrical & Electronic
Alessandro Sardellitti, Filippo Milano, Marco Laracca, Salvatore Ventre, Luigi Ferrigno, Antonello Tamburrino
Summary: Thickness measurements of metallic plates are mandatory in many industrial scenarios. Eddy-current testing (ECT) methods are attractive for online contactless thickness measurements. However, the current ECT technique has limitations in measuring thicker materials. In this article, we analyze the theoretical foundation of the method and propose two solutions to accurately estimate the thickness of materials. Numerical analysis and experiments confirm the effectiveness of the proposed solutions, making the method suitable for industrial and other applications.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2023)
Review
Food Science & Technology
Alin Khaliduzzaman, Ken Abamba Omwange, Dimas Firmanda Al Riza, Keiji Konagaya, Mohammed Kamruzzaman, Md Siddik Alom, Tianqi Gao, Yoshito Saito, Naoshi Kondo
Summary: The study of bioactive compounds like food antioxidants has attracted significant attention. Currently, protocols for estimating antioxidant activity are time-consuming and not suitable for large-scale applications. This review comprehensively summarizes the potential of fluorescence techniques for monitoring antioxidants in fruits and vegetables. The opportunities and challenges of fluorescence techniques are also discussed.
CRITICAL REVIEWS IN FOOD SCIENCE AND NUTRITION
(2023)
Article
Thermodynamics
Songheng Loem, Attakorn Asanakham, Thoranis Deethayat, Nat Vorayos, Tanongkiat Kiatsiriroat
Summary: Investigated the use of PV modules and electrical grid power to operate a 1 TR inverter air conditioner with PCM cool storage in Chiang Mai's tropical climate. By solidifying the PCM in the morning and utilizing the stored coolness during the day, the air conditioner's electrical power input could be reduced by 13.84% - 16.13% in winter and summer when connected to the electrical grid. In addition, connecting 4 PV modules to the air conditioner and PCM bed further increased energy savings.
THERMAL SCIENCE AND ENGINEERING PROGRESS
(2023)
Article
Engineering, Mechanical
Seungil Park, Changwoon Han
Summary: The lifetime of solar modules is not only a measure of reliability but also plays a crucial role in enhancing the competitiveness of the modules. The study focuses on improving the lifetime of Si solar modules under thermal cycling conditions through numerical analysis, optimization, and experimental validation. The research reveals that reducing the thicknesses of Cu and Si can greatly enhance the module's reliability and increase its lifetime by up to 181% under thermal cycling environments such as daily thermal fatigue in the desert.
JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY
(2022)
Review
Chemistry, Analytical
Ramesh Kumpati, Wojciech Skarka, Sunith Kumar Ontipuli
Summary: Material failure can occur under stress, temperature, and load conditions, with mechanical testing being a fundamental component of any design and manufacturing process. Nondestructive testing methods evaluate material quality without damaging sample integrity, playing a crucial role in detecting various types of material defects.
Article
Chemistry, Physical
Martin Scales, Joel Anderson, Jeffrey A. Kornuta, Nathan Switzner, Ramon Gonzalez, Peter Veloo
Summary: Federal rule changes have made non-destructive testing techniques an attractive alternative for verifying steel pipeline properties. Incorporating chemical composition data has been found to enhance the accuracy of instrumented indentation testing (IIT).
Article
Energy & Fuels
Marc Koentges, Michael Siebert, Arnaud Morlier, Romy Illing, Nicole Bessing, Frank Wegert
PROGRESS IN PHOTOVOLTAICS
(2016)
Article
Energy & Fuels
Robert Witteck, Boris Veith-Wolf, Henning Schulte-Huxel, Arnaud Morlier, Malte R. Vogt, Marc Kontges, Rolf Brendel
PROGRESS IN PHOTOVOLTAICS
(2017)
Article
Energy & Fuels
Boris Veith-Wolf, Robert Witteck, Arnaud Morlier, Henning Schulte-Huxel, Malte Ruben Vogt, Jan Schmidt
IEEE JOURNAL OF PHOTOVOLTAICS
(2018)
Article
Energy & Fuels
Felix Haase, Jorg Kaesewrieter, Seyed Roozbeh Nabavi, Eelco Jansen, Raimund Rolfes, Marc Koentges
IEEE JOURNAL OF PHOTOVOLTAICS
(2018)
Article
Energy & Fuels
Henning Schulte-Huxel, Susanne Blankemeyer, Arnaud Morlier, Rolf Brendel, Marc Koentges
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2019)
Review
Energy & Fuels
Marc Koentges, Arnaud Morlier, Gabriele Eder, Eckhard Fleiss, Bernhard Kubicek, Jay Lin
IEEE JOURNAL OF PHOTOVOLTAICS
(2020)
Article
Energy & Fuels
Arnaud Morlier, Bianca Lim, Susanne Blankemeyer, Henning Schulte-Huxel, Robert Witteck, Thomas Daschinger, Sonja Braeunig, Marc Koentges, Rolf Brendel
Summary: The study presents a method to achieve PV modules with the appearance of natural stone facades by replacing front glass pane of PV modules with stone veneer sheets or laminating veneers of natural stones onto the front glass pane. Single-cell PV modules and large-area demonstrator PV modules with different stone veneers were fabricated, with efficiency analyzed and measures suggested to reduce efficiency losses caused by stone veneers.
Article
Energy & Fuels
Stefan Bordihn, Andreas Fladung, Jan Schlipf, Marc Kontges
Summary: Failures in solar panels can cause power losses during operation, and electroluminescence imaging is commonly used for identification. This study proposes an automatic detection method using PCA and kNN to predict PID and LeTID failures. Gaussian blurring preprocessing is used to improve the PCA performance, and insights into the machine learning algorithm are gained through analyzing schematic EL images.
IEEE JOURNAL OF PHOTOVOLTAICS
(2022)
Article
Energy & Fuels
Marc Kontges, Jan Wagner, Michael Siebert, Stefan Bordihn, Carsten Schinke
Summary: In this article, a new method for measuring electroluminescence (EL) images of current half-cell PV modules without opening electrical contacts is presented. The method utilizes series parallel interconnection of the substrings in the module to power the luminescence part by illuminating the generator part. Defect interpretation of the resulting images differs slightly from usual EL images. The new method has practical limitations, requiring a significant electrical power to bring the luminescent part to the operating point.
IEEE JOURNAL OF PHOTOVOLTAICS
(2022)
Article
Energy & Fuels
Robert Witteck, Michael Siebert, Susanne Blankemeyer, Henning Schulte-Huxel, Marc Koentges
IEEE JOURNAL OF PHOTOVOLTAICS
(2020)
Proceedings Paper
Green & Sustainable Science & Technology
Arnaud Morlier, Michael Siebert, Iris Kunze, Susanne Blankemeyer, Marc Koentges
2018 IEEE 7TH WORLD CONFERENCE ON PHOTOVOLTAIC ENERGY CONVERSION (WCPEC) (A JOINT CONFERENCE OF 45TH IEEE PVSC, 28TH PVSEC & 34TH EU PVSEC)
(2018)
Proceedings Paper
Green & Sustainable Science & Technology
Arnaud Morlier, Michael Siebert, Iris Kunze, Susanne Blankemeyer, Marc Koentges
2018 IEEE 7TH WORLD CONFERENCE ON PHOTOVOLTAIC ENERGY CONVERSION (WCPEC) (A JOINT CONFERENCE OF 45TH IEEE PVSC, 28TH PVSEC & 34TH EU PVSEC)
(2018)