Article
Green & Sustainable Science & Technology
Yasaman Tavakol-Moghaddam, Yadollah Saboohi, Amirhossein Fathi
Summary: This paper presents a systematic approach to design an imaging dish for a concentrator photovoltaic (CPV) system with the aim of minimizing exergy destruction. The approach includes designing a parametric dish using imaging optics and solving a differential equation numerically, estimating the output energy and exergy using Monte Carlo simulation, and finding the optimal design parameters to minimize exergy destruction through an optimization algorithm. The results show that the optimal design allows for a CPV with a concentration factor of 100-150 and a temperature of 1019 degrees C, with estimated energy and exergy efficiencies of 74.07% and 66.36%, respectively.
Article
Thermodynamics
Jose M. Saura, Daniel Chemisana, Pedro M. Rodrigo, Florencia M. Almonacid, Eduardo F. Fernandez
Summary: The study shows that shading causes additional spatial and spectral non-uniformities, which can be reduced by using homogenizers, with SILO-Pyramid providing the best results.
Article
Energy & Fuels
Xueli Xing, Yu Xin, Fan Sun, Wanjun Qu, Hui Hong, Hongguang Jin
Summary: This study introduces a hybrid prototype that synergistically couples photovoltaic and solar thermal fuel for the cascading use of full-spectrum sunlight. Test results demonstrate that the efficiency of the hybrid prototype is significantly higher than that of individual concentrated solar photovoltaics.
Article
Optics
Wesley A. Britton, Yuyao Chen, Fabrizio Sgrignuoli, Luca Dal Negro
Summary: This paper introduces a novel design of dual-band multi-focal diffractive microlenses with a sub-wavelength thickness of only 235 nm, capable of simultaneously focusing visible and near-infrared spectral bands. Experimental results demonstrate that this microlens can achieve independent focal planes for two targeted spectral bands and encode the depth information of a sample into different spectral images.
LASER & PHOTONICS REVIEWS
(2021)
Article
Chemistry, Multidisciplinary
Marti Gibert-Roca, Miquel Casademont-Vinas, Quan Liu, Koen Vandewal, Alejandro R. Goni, Mariano Campoy-Quiles
Summary: This work proposes a novel spectral splitting device concept called RAINBOW, which lays various semiconducting junctions with cascading bandgaps side by side to improve the efficiency of organic solar cells. Simulations and experiments show that this geometry can reduce thermalization losses and improve light harvesting, resulting in a 46.6% relative improvement in efficiency compared to the best sub-cell. A working proof-of-concept monolithic device consisting of two sub-cells deposited from solution on the same substrate is successfully fabricated, demonstrating the feasibility and potential of the RAINBOW solar cell concept.
ADVANCED MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Julia S. van der Burgt, Susan A. Rigter, Nelson de Gaay Fortman, Erik C. Garnett
Summary: A system that overcomes the limitations of solar tracking and poor absorption of diffuse sunlight by utilizing light-induced halide segregation in mixed halide perovskite films is presented. By using a monolayer of silica microspheres to focus direct sunlight, a low bandgap region is formed in the focal point through light-induced phase segregation, resulting in an increase in voltage characteristic for concentrating systems. Diffuse sunlight is still absorbed by the high bandgap material, avoiding the loss of diffuse sunlight seen in conventional concentrators. The concept shows a 6.6% absolute increase in power conversion efficiency compared to the film without microspheres, indicating the promising potential for a self-optimizing concentrating system.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Optics
Elhem Rdhaounia, Mahmoud Ben Amara, Moncef Balghouthi
Summary: The efficiency of solar photovoltaic systems can be improved through spectrum splitting. An experimental investigation was conducted in Tunisia to study the effects of different spectrum distributions on the performance of a monocrystalline silicon photovoltaic cell. The study found that spectral splitting improves the cell's efficiency and power output, with the yellow-green spectral band showing the highest performance in summer.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Chemistry, Physical
Guijun Chen, Yutao Wang, Dongyue Jiang, Hongchen Wang, Kun Wang, Jie Tan, Mingyang Sun, Yongchen Song, Minyi Xu
Summary: A programmable compound prism (PCP) powered by triboelectric nanogenerator (TENG) is proposed in this study for solar beam steering, triggering power generation in multi-junction solar cells. Experimental results show that the proposed technology can significantly improve the power generation efficiency of multi-junction solar cells.
Article
Thermodynamics
Mohammad Alnajideen, Gao Min
Summary: A novel hybrid photovoltaic-thermoelectric system with a solar concentrator was designed, increasing overall efficiency by 6.3% due to thermoelectric harvesting of light energy.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Article
Energy & Fuels
Matthias Auf Der Maur, Gilad Moses, Jeffrey M. Gordon, Xuanqi Huang, Yuji Zhao, Eugene A. Katz
Summary: This study analyzed the temperature and intensity dependence of open-circuit voltage of InGaN/GaN multi-quantum well solar cells in high temperature and high illumination conditions. The results show that the simple ABC model can accurately reproduce this dependence, with consideration of temperature-dependent lifetime and device heating.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2021)
Article
Nanoscience & Nanotechnology
Jinhao Zang, Fuhang Jiao, Jianyong Wei, Qing Lou, Guangsong Zheng, Chenglong Shen, Yuan Deng, Ehsan Soheyli, Reza Sahraei, Xun Yang, Huaping Zang, Weimin Zhou, Wei Fan, Shaoyi Wang, Lin Dong, Chong-Xin Shan
Summary: Researchers have developed a luminescent solar concentrator using orange-emitting carbon nanodots, which efficiently utilize sunlight in visible wavelengths and exhibit superior performance in the response bands of photovoltaic cells.
Article
Multidisciplinary Sciences
Bo Chen, Zhenhua Yu, Arthur Onno, Zhengshan Yu, Shangshang Chen, Jiantao Wang, Zachary C. Holman, Jinsong Huang
Summary: This paper reports on a bifacial all-perovskite tandem structure that achieves an equivalent efficiency of 29.3% under a back-to-front irradiance ratio of 30. By embedding a light-scattering micrometer-sized particle layer and using a nonacidic hole transport layer, the efficiency of semitransparent Pb-Sn cells is increased from 15.6% to 19.4%, enabling the fabrication of efficient bifacial all-perovskite tandem devices.
Article
Chemistry, Physical
Qingjie Feng, Guangjun Nan
Summary: The Rashba effect in different phases of MAPbX(3) (MA = CH3NH3 andX = I and Br) was investigated using the density functional theory approach. The study revealed that the Rashba effect in MAPbX(3) with the ordered arrangement of MA cations is progressively weakened as the temperature decreases, mainly due to the reduced distortion of inorganic octahedrons. Additionally, the angle-resolved Rashba splitting in MAPbI(3) is not significantly affected by going from the bulk to the surfaces in the room-temperature phase, while in MAPbBr(3), the bulk Rashba splitting collapses into anisotropic Rashba splitting at the surfaces. These findings provide insights for manipulating spin-polarized carrier dynamics in photovoltaic and spintronic devices with LHPs.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Nanoscience & Nanotechnology
Julia S. van der Burgt, David R. Needell, Tom Veeken, Albert Polman, Erik C. Garnett, Harry A. Atwater
Summary: The study discusses the potential pathway for achieving low-cost, fixed-tilt light concentration with luminescent solar concentrators. Recent advances in anisotropically emitting nanophotonic structures show promise for improving efficiency. Utilizing Monte Carlo ray-trace modeling, the researchers provide a roadmap towards high conversion efficiency by incorporating anisotropy.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Energy & Fuels
Jose M. Saura, Pedro M. Rodrigo, Florencia M. Almonacid, Daniel Chemisana, Eduardo F. Fernandez
Summary: The study investigates the impact of non-uniform illumination on triple junction solar cells equipped with different optical systems, finding that the behavior of refractive and reflective systems differs. It also highlights the importance of the concentrator-to-receiver distance as a critical design parameter.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2021)
Article
Materials Science, Multidisciplinary
Fan Zhang, Jose F. Castaneda, Shangshang Chen, Wuqiang Wu, Michael J. DiNezza, Maxwell Lassise, Wanyi Nieg, Aditya Mohite, Yucheng Liu, Shengzhong Liu, Daniel Friedman, Henan Liu, Qiong Chen, Yong-Hang Zhang, Jinsong Huang, Yong Zhang
Article
Energy & Fuels
Myles A. Steiner, Ryan M. France, Emmett E. Perl, Daniel J. Friedman, John Simon, John F. Geisz
IEEE JOURNAL OF PHOTOVOLTAICS
(2020)
Article
Chemistry, Physical
Micha Ben-Naim, Reuben J. Britto, Chase W. Aldridge, Rachel Mow, Myles A. Steiner, Adam C. Nielander, Laurie A. King, Daniel J. Friedman, Todd G. Deutsch, James L. Young, Thomas F. Jaramillo
ACS ENERGY LETTERS
(2020)
Article
Physics, Applied
Kevin L. Schulte, Ryan M. France, Daniel J. Friedman, Alina D. LaPotin, Asegun Henry, Myles A. Steiner
JOURNAL OF APPLIED PHYSICS
(2020)
Article
Chemistry, Physical
Tao Song, Daniel J. Friedman, Nikos Kopidakis
Summary: Emerging photovoltaic technologies have gained remarkable attention for their rapid efficiency growth and transition toward commercialization. Accurate efficiency measurements are crucial for these technologies, but are more complicated due to their dynamic responses and susceptibility to degradation. Comprehensive efficiency calibration and reporting steady-state efficiency are important for better comparisons between reported efficiencies.
ADVANCED ENERGY MATERIALS
(2021)
Article
Multidisciplinary Sciences
Alina LaPotin, Kevin L. Schulte, Myles A. Steiner, Kyle Buznitsky, Colin C. Kelsall, Daniel J. Friedman, Eric J. Tervo, Ryan M. France, Michelle R. Young, Andrew Rohskopf, Shomik Verma, Evelyn N. Wang, Asegun Henry
Summary: Thermophotovoltaics (TPVs) convert infrared light into electricity, enabling energy storage and conversion using high temperature heat sources. This study reports the fabrication and measurement of high-efficiency TPV cells, demonstrating the efficiency of high-bandgap tandem TPV cells.
Article
Optics
Fan Zhang, Jose F. Castaneda, Timothy H. Gfroerer, Daniel Friedman, Yong-Hang Zhang, Mark W. Wanlass, Yong Zhang
Summary: The authors demonstrate an all optical approach that allows for obtaining various key parameters relevant to carrier recombination dynamics in semiconductor materials. By analyzing photoluminescence and Raman measurements, they can determine parameters such as internal quantum efficiency, carrier density, and defect center occupation fraction. This method greatly enhances the usefulness of photoluminescence technique without the need for device processing and can be used for comprehensive material and device characterization.
LIGHT-SCIENCE & APPLICATIONS
(2022)
Article
Chemistry, Physical
Eric J. Tervo, Ryan M. France, Daniel J. Friedman, Madhan K. Arulanandam, Richard R. King, Tarun C. Narayan, Cecilia Luciano, Dustin P. Nizamian, Benjamin A. Johnson, Alexandra R. Young, Leah Y. Kuritzky, Emmett E. Perl, Moritz Limpinsel, Brendan M. Kayes, Andrew J. Ponec, David M. Bierman, Justin A. Briggs, Myles A. Steiner
Summary: Thermophotovoltaics is a promising solid-state energy converter with potential applications in grid-scale energy storage, concentrating solar-thermal power, and waste-heat recovery. Through good spectral management, optimized cell architecture, excellent material quality, and low series resistance, we have successfully designed, fabricated, and tested high-efficiency large-area thermophotovoltaic devices with an efficiency of up to 38.8% and an electrical power density of 3.78 W/cm(2) at a high emitter temperature of 1850℃.
Review
Energy & Fuels
Tao Song, Charles Mack, Rafell Williams, Daniel J. Friedman, Nikos Kopidakis
Summary: This article discusses the special performance measurement points and methods of perovskite multijunctions, including the measurement of spectral response, spectrum adjustment, and protocols for measuring the power output of the device at STC. It also presents common errors and pitfalls, as well as methods for evaluating data accuracy when a spectrally adjustable solar simulator is not available. Finally, performance measurement methods are recommended for high throughput situations.
Proceedings Paper
Energy & Fuels
Tao Song, Larry Ottoson, Josh Gallon, Daniel J. Friedman, Nikos Kopidakis
Summary: This paper emphasizes the importance of reliable performance calibration on large-size perovskite modules, proposing a protocol for Maximum Power Point Tracking (MPPT) and comparing it with Asymptotic PMAX. The interplay between metastability and degradation in perovskite modules is demonstrated using MPPT, highlighting the necessity to develop preconditioning protocols for stabilizing these devices. The goal is to promote the development of consensus protocols for performance calibration of perovskite modules to advance their credible power ratings in the PV market.
2021 IEEE 48TH PHOTOVOLTAIC SPECIALISTS CONFERENCE (PVSC)
(2021)
Proceedings Paper
Energy & Fuels
Nikos Kopidakis, Paul Ndione, Kyle Lu, Greg Horrner, Daniel Friedman
Summary: Measurements of the spectral response of cells in a PV module are essential for accurate calibration and understanding of the device's physics. A new approach for testing individual cells' spectral response in silicon modules allows for fast mapping of responses and reveals significant variations among different cells in a module. This variation has implications for the uncertainty of spectral correction and ISC calibration using a solar simulator.
2021 IEEE 48TH PHOTOVOLTAIC SPECIALISTS CONFERENCE (PVSC)
(2021)
Article
Chemistry, Physical
Shinjae Hwang, James L. Young, Rachel Mow, Anders B. Laursen, Mengjun Li, Hongbin Yang, Philip E. Batson, Martha Greenblatt, Myles A. Steiner, Daniel Friedman, Todd G. Deutsch, Eric Garfunkel, G. Charles Dismukes
SUSTAINABLE ENERGY & FUELS
(2020)
Proceedings Paper
Energy & Fuels
Daniel J. Friedman, Myles A. Steiner
2019 IEEE 46TH PHOTOVOLTAIC SPECIALISTS CONFERENCE (PVSC)
(2019)
Article
Chemistry, Physical
Myles A. Steiner, Collin D. Barraugh, Chase W. Aldridge, Isabel Barraza Alvarez, Daniel J. Friedman, Nicholas J. Ekins-Daukes, Todd G. Deutsch, James L. Young
SUSTAINABLE ENERGY & FUELS
(2019)
Article
Chemistry, Physical
Reuben J. Britto, James L. Young, Ye Yang, Myles A. Steiner, David T. LaFehr, Daniel J. Friedman, Mathew Beard, Todd G. Deutsch, Thomas F. Jaramillo
JOURNAL OF MATERIALS CHEMISTRY A
(2019)