Article
Engineering, Electrical & Electronic
Yafeng Shu, Canglong Wang, Jitao Liu, Zhaocang Meng, Yinlong Wang, Wenting Li, Kui Xie, Yanshi Zhang, Lei Yang
Summary: By combining heating and irradiation of alpha beam, a suitable method for rapidly evaluating and selecting components in TPV cells has been found. The temperature distribution in the tungsten emitter was found to be Gaussian along the radial direction under a uniform distribution of the He+ ion beam. The distance between emitter and TPV cells greatly affects the radiant heat flux and temperature. The optimal distance was found to be 80 mm, resulting in the highest output power of TPV cells.
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2023)
Review
Multidisciplinary Sciences
Di Liu, Linglin Zhou, Zhong Lin Wang, Jie Wang
Summary: This study summarizes the recent progress in research on TENG, covering from AC-TENG to DC-TENG, including the design and applications of constant current TENG, showing their similarities and differences for guiding future research.
Article
Energy & Fuels
Young Jun Yoon, Jae Sang Lee, In Man Kang, Jung-Hee Lee, Dong-Seok Kim
Summary: The designed and optimized GaN-based betavoltaic cell with an AlGaN back-barrier layer and finger structure significantly improved the output power density. The optimized structure enhanced the short-circuit current density (J(SC)), resulting in a 14.8% increase in output power density compared to conventional cells.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Nanoscience & Nanotechnology
Jinfeng Liu, Xiangyu Gao, Chaorui Qiu, Liao Qiao, Jingya Yang, Ming Ma, Kexin Song, Haisheng Guo, Zhuo Xu, Fei Li
Summary: The BSPEH, utilizing a modified barbell-shaped design with two crystal stacks, shows a significantly higher power density and stable energy harvesting properties compared to traditional cantilever piezoelectric energy harvesters.
Article
Thermodynamics
Abdelhak Keddouda, Razika Ihaddadene, Ali Boukhari, Abdelmalek Atia, Muesluem Arici, Nacer Lebbihiat, Nabila Ihaddadene
Summary: This study proposes artificial neural network (ANN) and regression models for predicting the power output of photovoltaic (PV) modules, considering the effects of climatic conditions and operating temperature. The models were trained using experimental data and selected attributes such as solar irradiation, temperature, wind speed, and humidity. The ANN model showed higher accuracy compared to linear regression models, while the Rational-PowerLaw (RPL) and Power-Law (PL) models captured the nonlinearity of the system and achieved excellent precision. The proposed models outperformed others in the literature, demonstrating superior performance and accuracy.
ENERGY CONVERSION AND MANAGEMENT
(2023)
Article
Green & Sustainable Science & Technology
Jun Xie, Bingzi Zhao, Hang Zhang, Zheng Fu, Tianhua Yang, Rundong Li
Summary: In this study, an experimental platform for PV power generation was established in Shenyang, China to investigate the effects of winter snowfall and summer ash accumulation on the output characteristics of PV modules. Empirical formulas were proposed to predict the average power reduction rate based on the dust coverage density and tilt angle in the test data.
Article
Chemistry, Physical
Jiajia Shao, Yi Yang, Ou Yang, Jie Wang, Morten Willatzen, Zhong Lin Wang
Summary: The distribution of electric field and energy dynamics of triboelectric nanogenerators (TENGs) are determined using 3D mathematical modeling. The stored electrical energy and output efficiency of TENGs are quantitatively calculated, and guidelines for optimization are discussed based on device parameters, geometry, and optimum conditions. Adjustments in gap distance between neighboring TENG devices improve the performance of TENG arrays, with universal design rules and holistic optimization strategies presented for the network structure of TENGs for the first time.
ADVANCED ENERGY MATERIALS
(2021)
Article
Meteorology & Atmospheric Sciences
Fang Sun, Shunwu Zhou, Cheng Yang, Xulin Ma, Meirong Wang, Yang Sun, Shu Zhou
Summary: This study analyzed the characteristics of the northeast moving Tibetan Plateau Vortex (NE-TPV) and compared it with the east moving TPV. The research found differences between the two types of TPVs in terms of source location, intensity, circulation, and impact on precipitation. The study highlights the importance of the Hetao High-Pressure Ridge in blocking the NE-TPV and provides insights into the activity characteristics of TPVs in the Tibetan Plateau.
ATMOSPHERIC RESEARCH
(2022)
Article
Materials Science, Multidisciplinary
Jiwu Xin, Wang Li, Sihui Li, Yang Tao, Tian Xu, Yubo Luo, Qinghui Jiang, Lei Wei, Junyou Yang
Summary: InSb is a narrow-bandgap semiconductor widely used in photodetectors, infrared thermal imaging, and Hall devices. However, its high thermal conductivity and small Seebeck coefficient limit its thermoelectric performance. By introducing point defects and nanoengineering through nanocompositing, the power factor and ZT value of InSb can be effectively improved, providing a reference for optimizing the performance of other thermoelectric systems.
SCIENCE CHINA-MATERIALS
(2022)
Article
Green & Sustainable Science & Technology
Peter Enevoldsen, Mark Z. Jacobson
Summary: This study introduces a new method to estimate the spacing areas occupied by existing onshore and offshore wind farms worldwide, as well as quantifies the installed and output power densities of these farms. Results show higher power densities than previously reported, indicating that existing wind turbines may extract more wind power over less land or water than previously thought.
ENERGY FOR SUSTAINABLE DEVELOPMENT
(2021)
Article
Engineering, Electrical & Electronic
Xuankai Qi, Chaoqun Ma, Debo Wang
Summary: This work proposes a high-performance spiral piezoelectric energy harvester (PEH) with wraparound proof mass to improve the output power density and achieve a small footprint. The compact design and shared additional mass of the spiral PEH results in greater vibration, reducing the resonant frequency and increasing the output power. Experimental results show that the output characteristics are the best when the piezoelectric material length (L-p) is 18.75 mm, with a maximum open-circuit output voltage of 47.8 V and an output power of 2635 mu W. The multidirectional energy harvesting capability of the spiral PEH is also studied and measured.
IEEE SENSORS JOURNAL
(2023)
Article
Energy & Fuels
Qihui Yu, Xiaodong Li, Yanqi Geng, Xin Tan
Summary: The piston expander with compressed air as working medium has advantages of cleanliness, reliability and safety. However, its application is limited by low exhaust temperature and low output power/efficiency. Spraying micron water mist into the cylinder can achieve isothermal expansion process and improve the heat transfer rate.
Article
Chemistry, Physical
Ken Kudara, Masakazu Arai, Yukiko Suzuki, Aoi Morishita, Jun Tsunoda, Atsushi Hiraiwa, Hiroshi Kawarada
Summary: This study investigates the DC and RF characteristics of 2DHG diamond MOSFETs with regrown P++-diamond layers as source and drain. The results demonstrate that regrown P++-diamond has the potential to improve drain current density and output power density of 2DHG diamond field-effect transistors.
Article
Thermodynamics
Akshayveer, Amit Kumar, Ajeet Pratap Singh, R. Sreeram Kotha, O. P. Singh
Summary: The new concept of bifacial PV/PCM system with sandwiched thermal energy storage enclosure shows significantly higher power output density and total energy utilization density per unit land area compared to conventional PV systems. By enhancing the incident radiation utilization and melthing amount through optimized design, the electric power output of the system has been significantly increased.
ENERGY CONVERSION AND MANAGEMENT
(2021)
Article
Green & Sustainable Science & Technology
Wanxiang Yao, Xiangru Kong, Ai Xu, Puyan Xu, Yan Wang, Weijun Gao
Summary: This paper investigates the influence of rainwater on the output power of photovoltaic modules under different rainfall conditions. It is found that rainstorm conditions increased the peak PV module output power by 16.1%-28.2% compared to light rainfall conditions, with the rain showing better cleaning effects for PV modules with higher dust densities.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2023)
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)