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Today’s Solar Power Generating Technologies
Published in Anco S. Blazev, Solar Technologies for the 21st Century, 2021
a-Si solar cells can be manufactured as single, double and multi-junction devices. This increases the useful range of the technology, since multi-junction solar cells have higher efficiency and could be used in many areas of the energy markets.
Energy Markets’ Future
Published in Anco S. Blazev, Global Energy Market Trends, 2021
Thus far, multi-junction solar cells made primarily using the III-V compounds have clearly proven that by minimizing thermalization and transmission losses, large improvements in efficiency can be made over those of single-junction cells. These devices find use in generating power for space applications and in concentrator systems. They show great promise for high efficiency and reliability under harsh climate conditions, such as those in the deserts.
Photovoltaic Cells
Published in Ranjan Vepa, Electric Aircraft Dynamics, 2020
Multi-junction solar cells are one of the most promising technologies achieving high sunlight to electricity conversion efficiency. Resistive losses constitute one of the main underlying mechanisms limiting their efficiency under high illumination. Given that the smaller the band gap, the easier it is to promote movement of electrons and there is a corresponding reduction in the resistivity of the material, fine-tuning of the different electronic band gaps (engineering the band gaps) involved in multi-junction stacks will mitigate the detrimental effects of losses for both concentration-dependent and independent series resistances.
Experimental investigation of rectangular mini channel array as an effective tool for energy efficient cooling of electronic gadgets
Published in Energy Sources, Part A: Recovery, Utilization, and Environmental Effects, 2023
Jitendra D Patil, B S Gawali, Umesh Awasarmol, Girish Kapse, Shivam R Patil
Micro and mini channel heat exchangers are widely used in conventional and renewable energy (cooling of concentrator photovoltaic conversion systems) conversion systems not only due to its compactness but also because of its excellent thermal performance (Gilmore, Timchenko, and Menictas 2018). By utilizing concentrated solar radiation along with an efficient cooling system, it is possible not only to enhance efficiency of solar cell by 10 to 20% (with multi-junction solar cell) but also to reduce the cost of solar electricity substantially. Experimental study shows that the use of active cooling system with micro channel heat sink in the concentrated photovoltaic system (concentration ratio = 20) leads in the reduction of solar cell temperature up to 25°C (298 K) with uniform cell temperature (Radwan, Emam, and Ahmed 2018). Water cooled concentrated photovoltaic cell can achieve cell efficiency up to 28% and electric exergy efficiency up to 30% (Ji et al. 2022).
Infrared rectification based on electron field emission in nanoantennas for thermal energy harvesting
Published in Journal of Modern Optics, 2020
A. Chekini, M. Neshat, S. Sheikhaei
Photovoltaic (PV) cells have been conventionally used to convert energy from the Sun into the electricity. In photovoltaic cells, the particle theory of light is used to model generation and recombination of charge carriers in a p-n junction (1). According to the theory, the efficiency of solar cells is limited. From 1990, many research institutes have focused on solar cell efficiency improvement. According to an NREL report, a laboratory sample of a multi-junction solar cell was developed in 2015 with a demonstration of about 40 percent efficiency under ideal laboratory conditions (2).