Article
Energy & Fuels
Zhiqiang Hu, Mu Cong, Xinyu Zhang, Jiayan Li, Jiangang Zhang, Yi Tan, Ziyang Ou, Yangjun Chen, Changming Liu, Dachuan Jiang, Pengting Li
Summary: The electrical properties of N-type Recharged-Czochralski (RCz) silicon solar cells are significantly affected by the concentration of metal impurities in the silicon materials. In this study, several N-type RCz silicon ingots were grown using feedstock with varying impurities concentration, and the distribution of minority carrier lifetime was tested. It was found that a wider range of impurity concentrations in the feedstock led to higher and more stable minority carrier lifetime in the ingots. Solar cells made from these ingots achieved an average efficiency of over 24.57%. Additionally, impurities segregation calculation and solar cells electroluminescence (EL) test results suggested that ring defects were the primary cause of variations in electrical properties of silicon ingots produced from feedstock with different impurity concentrations. This study broadened the process window for producing high-efficiency N-type Czochralski (Cz) silicon solar cells, potentially reducing production costs.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2023)
Article
Physics, Applied
N. Stanojevic, D. K. Markushev, S. M. Aleksic, D. S. Pantic, S. P. Galovic, D. D. Markushev, J. Ordonez-Miranda
Summary: By analogizing resistor-capacitor (RC) filters and the thermoelastic component of a photoacoustic signal, the complex thermoelastic response of an open photoacoustic cell is described as a simple linear time-invariant system of a low-pass RC filter. A linear relation between the thermoelastic cut-off frequency and sample material thickness within the range of 10-1000 μm is found to establish this description. Numerical simulations and experimental validation using an open photoacoustic cell setup confirm the linear dependence of the thermoelastic cut-off frequency on the sample thickness, providing a basis for a new method of thermal material characterization.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Chemistry, Physical
Nobuyuki Ishida, Takaaki Mano, Takeshi Noda
Summary: The characterization of the atomic arrangement and distribution of dopant atoms in semiconductors is crucial for understanding the effects of doping on electronic properties. In this study, scanning tunneling microscopy (STM) was used to image dopant species in highly Si-doped GaAs. The results provide atomic-scale information on the behavior of Si species and insights into their possible roles in modifying macroscopic electronic properties of GaAs.
APPLIED SURFACE SCIENCE
(2022)
Article
Energy & Fuels
Yan Zhu, Fiacre Rougieux, Nicholas E. Grant, Joyce Ann T. De Guzman, John D. Murphy, Vladimir P. Markevich, Gianluca Coletti, Anthony R. Peaker, Ziv Hameiri
Summary: Recent studies have shown that detrimental defects in Float-zone silicon wafers can lead to a significant reduction in carrier lifetime. By combining different characterization techniques and passivation schemes, key defects causing degradation in silicon materials are identified and their parameters are extracted and discussed.
IEEE JOURNAL OF PHOTOVOLTAICS
(2021)
Article
Chemistry, Multidisciplinary
Sheng'ou Lu, Hongyu Chen, Wei Hang, Rong Wang, Julong Yuan, Xiaodong Pi, Deren Yang, Xuefeng Han
Summary: The effect of nitrogen doping on dislocation proliferation in SiC crystals was investigated. The thermal field and thermal stress during PVT growth were calculated, and the dislocation density was calculated based on the Alexander-Haasen model. By comparing the calculation and experimental results, a possible value of effective stress was proposed to evaluate the effect of nitrogen doping on dislocation density in n-type SiC.
Article
Nanoscience & Nanotechnology
Zhenhui Liu, Qihao Zhang, Ulrike Wolff, Christian G. F. Blum, Ran He, Amin Bahrami, Maximilian Beier-Ardizzon, Christian Reimann, Jochen Friedrich, Heiko Reith, Gabi Schierning, Kornelius Nielsch
Summary: By reducing impurities in silicon waste using metallurgical methods, the thermal conductivity of purified silicon is lowered, improving the thermoelectric figure of merit zT, providing a new solution for engineering applications.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Physical
Shilong Liu, Manyu Xia, Faqin Chen, Qi Lei
Summary: This study analyzes the impurities and crystal defects in the shadows of cast monocrystalline silicon and provides detailed insights. The results show that the concentration of substitutional carbon and iron in the shadow area is significantly high, while carbon impurities promote the formation of oxygen precipitation. Additionally, the study reveals the presence of two types of dislocations and the observation of silicon carbide precipitates at dislocation etch pits and subgrain boundaries in the shadow area.
Article
Chemistry, Multidisciplinary
Zakhar R. Kudrynskyi, Illya Mintyanskii, Petro Savitskii, Zakhar D. Kovalyuk
Summary: This study provides important knowledge of the effect of cobalt impurities on the physical properties of InSe, which is crucial for tailoring the parameters of this semiconductor for applications in electronics and spintronics.
APPLIED SCIENCES-BASEL
(2022)
Article
Chemistry, Multidisciplinary
Andika Pandu Nugroho, Naufal Hanif Hawari, Bagas Prakoso, Andam Deatama Refino, Nursidik Yulianto, Ferry Iskandar, Evvy Kartini, Erwin Peiner, Hutomo Suryo Wasisto, Afriyanti Sumboja
Summary: This study successfully improved the performance of silicon anodes by fabricating a vertically aligned n-type silicon nanowire array, which showed higher initial Coulombic efficiency and better cycle stability compared to traditional silicon wafers. The potential of n-SiNW anodes for high current density applications was demonstrated, presenting a practical alternative for high precision patterning on a wafer-scale.
Article
Chemistry, Physical
Tihomir Knezevic, Eva Jelavic, Yuichi Yamazaki, Takeshi Ohshima, Takahiro Makino, Ivana Capan
Summary: In this study, boron-related defects in low-doped n-type 4H-SiC semitransparent Schottky barrier diodes (SBDs) were investigated using minority carrier transient spectroscopy (MCTS). Boron, introduced during chemical vapor deposition (CVD) crystal growth, led to the presence of shallow (B) and deep boron (D-center) defects, with concentrations as high as 1 x 10(15) cm(-3). Despite the higher concentration of boron compared to nitrogen doping, the steady-state electrical characteristics of the n-type 4H-SiC SBDs remained unaffected.
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
Materials Science, Multidisciplinary
Cassidy M. Atkinson, Matthew C. Guziewski, Shawn P. Coleman, Sanjeev K. Nayak, S. Pamir Alpay
Summary: This study provides a detailed investigation on the formation energies of point defects and the stability of various dopants in bulk cubic silicon carbide and in grain boundaries, as well as the driving force of dopants towards grain boundaries. The results show different behaviors of dopants in grain boundaries, offering a chemical landscape for targeted materials development.
Article
Chemistry, Physical
Bo Kong, Tixian Zeng, Wentao Wang
Summary: This work systematically investigates the n-type and p-type conductivity mechanisms of bulk BiOCl using first-principles calculations. The study reveals that different growth conditions lead to distinct electrical properties in BiOCl, providing explanations for observed experimental phenomena.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2021)
Article
Chemistry, Multidisciplinary
Guruswamy Vaddamanu, Anandarup Goswami, N. Ravi Sekhar Reddy, Katam Reddy Vinod Kumar Reddy, Naveen Mulakayala
Summary: Baricitinib is a novel active pharmaceutical ingredient used for rheumatoid arthritis treatment. During its synthesis, three unknown impurities were identified and isolated. The structures of these impurities were confirmed, and they can be used as reference standards for synthesizing highly pure baricitinib drug substance.
Article
Energy & Fuels
Ran Chen, Matthew Wright, Daniel Chen, Jie Yang, Peiting Zheng, Xinyu Zhang, Stuart Wenham, Alison Ciesla
Summary: TOPCon solar cells, when coupled with hydrogenation treatment, show significant efficiency enhancement and remarkable stability with almost no performance degradation.
PROGRESS IN PHOTOVOLTAICS
(2021)
Article
Chemistry, Analytical
B. Karches, K. Welter, C. Stieghorst, N. Wiehl, T. Reich, S. Riepe, P. Krenckel, H. Gerstenberg, C. Plonka
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
(2017)
Article
Energy & Fuels
Florian Schindler, Johannes Giesecke, Bernhard Michl, Jonas Schoen, Patricia Krenckel, Stephan Riepe, Wilhelm Warta, Martin C. Schubert
PROGRESS IN PHOTOVOLTAICS
(2017)
Article
Crystallography
Patricia Krenckel, Stephan Riepe, Florian Schindler, Theresa Strauch
JOURNAL OF CRYSTAL GROWTH
(2017)
Article
Chemistry, Inorganic & Nuclear
Barbara Karches, Jonas Schoen, Heiko Gerstenberg, Gabriele Hampel, Patricia Krenckel, Christian Plonka, Bernard Ponsard, Stephan Riepe, Christian Stieghorst, Norbert Wiehl
Article
Energy & Fuels
Florian Schindler, Bernhard Michl, Patricia Krenckel, Stephan Riepe, Jan Benick, Ralph Mueller, Armin Richter, Stefan W. Glunz, Martin C. Schubert
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2017)
Article
Energy & Fuels
Jan Benick, Armin Richter, Ralph Muller, Hubert Hauser, Frank Feldmann, Patricia Krenckel, Stephan Riepe, Florian Schindler, Martin C. Schubert, Martin Hermle, Andreas W. Bett, Stefan W. Glunz
IEEE JOURNAL OF PHOTOVOLTAICS
(2017)
Article
Chemistry, Analytical
Christian Stieghorst, Gabriele Hampel, Barbara Karches, Patricia Krenckel, Petra Kudejova, Christian Plonka, Zsolt Revay, Stephan Riepe, Katharina Welter, Norbert Wiehl
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
(2018)
Article
Energy & Fuels
Theresa Strauch, Matthias Demant, Patricia Krenckel, Stephan Riepe, Stefan Rein
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2018)
Article
Energy & Fuels
Florian Schindler, Andreas Fell, Ralph Mueller, Jan Benick, Armin Richter, Frank Feldmann, Patricia Krenckel, Stephan Riepe, Martin C. Schubert, Stefan W. Glunz
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2018)
Article
Crystallography
Soichiro Kamibeppu, Patricia Krenckel, Theresa Troetschler, Adam Hess, Stephan Riepe, Noritaka Usami
JOURNAL OF CRYSTAL GROWTH
(2020)
Article
Energy & Fuels
David Tweddle, Phillip Hamer, Zhao Shen, Friedemann D. Heinz, Patricia Krenckel, Stephen Riepe, Florian Schindler, Peter R. Wilshaw, Michael P. Moody
IEEE JOURNAL OF PHOTOVOLTAICS
(2020)
Article
Energy & Fuels
Martin C. Schubert, Florian Schindler, Jan Benick, Stephan Riepe, Patricia Krenckel, Armin Richter, Ralph Mueller, Benjamin Hammann, Sebastian Nold
Summary: The interest in cast mono silicon is growing due to its advantages of lower energy consumption, smaller carbon footprint, lower oxygen content, and reduced oxygen-related defects. Compared to high performance multicrystalline silicon, cast mono silicon has shown higher potential for cell efficiency in a TOPCon cell structure.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2021)
Article
Crystallography
Patricia Krenckel, Yusuke Hayama, Florian Schindler, Theresa Troetschler, Stephan Riepe, Noritaka Usami
Summary: The study demonstrates the feasibility of the SMART approach on larger ingots, which successfully limits the generation of structural defects by maintaining the monocrystalline structure using functional defects, resulting in increased monocrystal area and electrical material quality.
Proceedings Paper
Energy & Fuels
Florian Schindler, Bernhard Michl, Patricia Krenckel, Stephan Riepe, Jan Benick, Ralph Mueller, Armin Richter, Stefan W. Glunz, Martin C. Schubert
7TH INTERNATIONAL CONFERENCE ON SILICON PHOTOVOLTAICS, SILICONPV 2017
(2017)
Proceedings Paper
Energy & Fuels
Theresa Strauch, Matthias Demant, Patricia Krenckel, Stephan Riepe, Stefan Rein
7TH INTERNATIONAL CONFERENCE ON SILICON PHOTOVOLTAICS, SILICONPV 2017
(2017)
Article
Energy & Fuels
Shahriyar Safat Dipta, Md Habibur Rahaman, Walia Binte Tarique, Ashraful Hossain Howlader, Ayush Pratik, John A. Stride, Ashraf Uddin
Summary: Implementing a double-sided passivation approach can enhance the performance of n-i-p structured PSCs and improve the stability and photovoltaic properties of the cells.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2024)
Article
Energy & Fuels
Daniel Ourinson, Andreas Brand, Andreas Lorenz, Marwan Dhamrin, Sebastian Tepner, Michael Linse, Nathalie Goettlicher, Kosuke Tsuji, Jonas D. Huyeng, Florian Clement
Summary: This work presents two approaches to reduce the amount of silver on the rear side of M2-sized industrial iTOPCon solar cells. The Cu-based approach shows promise with similar power conversion efficiency compared to the conventional approach, while the Al-based approach exhibits some limitations but demonstrates the potential of such type of contact for iTOPCon solar cells.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2024)
Article
Energy & Fuels
Abasifreke Ebong, Donald Intal, Sandra Huneycutt, Thad Druffel, Ruvini Dharmadasa, Kevin Elmer, Apolo Nambo
Summary: This study demonstrates the successful metallization of a PERC silicon solar cell using screen-printable copper (Cu) paste. The Cu paste contains antioxidant additives and diffusion inhibitors to prevent oxidation and diffusion of Cu. The Cu-printed cells achieved an efficiency of 19% and showed no Cu diffusion after characterization tests. The long-term stability and effectiveness of the Cu diffusion barrier were also confirmed.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2024)
Article
Energy & Fuels
Senami Zogbo, Wilfried Favre, Olivier Bonino, Marie-Estelle Gueunier-Farret
Summary: Measuring specific contact resistivity (pc) is crucial for interface engineering in high efficiency solar cells. The Transfer Length Method (TLM) is commonly used for evaluating layer sheet resistance (Rsheet) and pc, but it is not suitable for metal/Transparent Conductive Oxide (TCO) interface evaluation in silicon heterojunction (SHJ) cells. This study investigates the parameters that restrict current confinement within the TCO, including mid-gap trap density (Dit) at the a-Si:H/c-Si interface and the activation energy (Ea = Ec - EF) variation of a-Si:H contact layers.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2024)
Article
Energy & Fuels
Jean-Baptiste Charpentier, Philippe Voarino, Julien Gaume
Summary: The phenomenon of ribbon lengthening in PV modules exposed to thermal cycling is not well explained in the literature. In this study, a three layers model is proposed to explain this effect, and the predictions of the model are validated through finite element method simulations and experiments. The results show that the model predictions are consistent with the indirect measurements, but not with the direct measurements. Additionally, it is inferred that the encapsulant plays a role after the solder failure.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2024)
Article
Energy & Fuels
Jean-Baptiste Charpentier, Philippe Voarino, Julien Gaume
Summary: This study investigates the problematic ribbon lengthening observed in PV modules exposed to high amplitude thermal cycling. A simplified system model is proposed and accurate predictions are obtained using the Finite Element Method. The results show that the thickness of the encapsulant has a substantial impact on the lengthening of the ribbons.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2024)
Article
Energy & Fuels
S. Catalan-Gomez, E. Martinez Castellano, M. Schwarz, M. Montes Bajo, L. Dorado Vargas, A. Gonzalo, A. Redondo-Cubero, A. Gallego Carro, A. Hierro, J. M. Ulloa
Summary: This study investigates the use of core-shell gallium nanoparticles as functional light scatterers on solar cells. By optimizing the nanoparticle size, the short-circuit current of the solar cells is significantly improved. The underlying physical mechanism is studied through optical measurements and simulations, and a method to reduce the plasmonic effect of the nanoparticles is demonstrated.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2024)
Article
Energy & Fuels
M. Gamel, G. Lopez, A. M. Medrano, A. Jimenez, A. Datas, M. Garin, I. Martin
Summary: In this study, a highly reflective ohmic contact to p-type c-Ge material is demonstrated, which can improve the efficiency of thermophotovoltaic devices. The experimental results show that this contact can simultaneously meet the requirements of good back surface passivation, low electrical resistivity, and high reflectivity. Moreover, simulations suggest that implementing these back contacts has the potential to achieve conversion efficiencies comparable to high-efficiency c-Ge TPV cells.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2024)
Article
Energy & Fuels
Hongyang Wei, Qing Xu, Dongchu Chen, Min Chen, Menglei Chang, Xiufang Ye
Summary: This study prepared solar selective absorption films based on anodic aluminum oxide (AAO) photonic crystals using a unique electrodeposition method. The Co-Ag electrodeposited film exhibited superior solar selective absorption properties and thermal stability.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2024)
Article
Energy & Fuels
Ankit Kumar, Ankit Chauhan, Jordi Llobet, Helder Fonseca, Patricia C. Sousa, Carlos Calaza, Gil Shalev
Summary: This study found that decorating subwavelength arrays with SiO2 quasi-nanolenses (qNL arrays) can enhance the absorption of the solar spectrum. Optical absorption mechanisms in qNL arrays were investigated using near-field scanning optical microscopy (NSOM), revealing that the enhancement is a result of the combination of effective antireflection coating, increased optical interactions between adjacent dielectrics for elevated light trapping, and strong light concentration due to the presence of qNLs.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2024)
Article
Energy & Fuels
S. Pingel, T. Wenzel, N. Goettlicher, M. Linse, L. Folcarelli, J. Schube, S. Hoffmann, S. Tepner, Y. C. Lau, J. Huyeng, A. Lorenz, F. Clement
Summary: This study demonstrates the potential to reduce silver consumption in highly efficient SHJ cells through fine-line screen printing using low temperature paste with various screens. The results show that using finer mesh allows for narrower grid fingers and lower resistance, leading to improved cell efficiency. Simulation results indicate that module wire configuration is crucial for reducing silver consumption.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2024)
Article
Energy & Fuels
Xibo He, Jun Qiu, Wei Wang, Yicheng Hou, Yong Shuai
Summary: This paper proposes a novel phase change material with high thermal conductivity and stability for fast photo-thermal conversion and storage. The experimental results demonstrate excellent durability and stability of the phase change material, with good performance in thermal conductivity and thermal storage efficiency.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2024)
Article
Energy & Fuels
Qingyuan Liu, Lin Wang, Zheng Liu, Guohua Liu
Summary: A new evaporating structure consisting of liquid marble with tunable nanowire array is proposed to enhance solar evaporation. The experiments show that the liquid marble with nanowire array exhibits outstanding evaporation performance, which has significant implications for seawater desalination or wastewater treatment.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2024)
Article
Energy & Fuels
Hao Liu, Qiming Liu, Jinpei Liu, Yonggang Zhao, Yingjie Yu, Yue An, Ganghui Wei, Yanzheng Li, Yujun Fu, Junshuai Li, Deyan He
Summary: Moisture in the air is identified as the main cause of performance degradation in organic-inorganic hybrid solar cells. Exposure to air leads to the growth of thin oxide layer on the interface and the formation of silver sulfide, increasing the series resistance and decreasing the fill factor, thus degrading the cell performance.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2024)
Article
Energy & Fuels
E. Blanco, P. Martin, M. Dominguez, P. Fernandez-Palacios, I. Lombardero, C. Sanchez-Perez, I. Garcia, C. Algora, M. Gabas
Summary: This study addresses the lack of optical parameters for p-type Ge wafers by determining the complex refractive indices of commercial Ge wafers with varying doping levels. The obtained data successfully reproduces the critical points associated with interband transitions and absorption features below the bandgap. The refractive indices were validated through experimental measurements and solar cell simulations.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2024)
