The design and optimization of gaas single solar cells using. Ultrathin gaas singlejunction solar cells integrated with a. Spectral response of a simulated triple junction ingapgaasge solar cell construction of the triple junction cell is a stacked. Heterogeneous integration of iiiv multijunction solar cells. It is a form of photoelectric cell, defined as a device whose electrical characteristics, such as current, voltage, or resistance, vary when exposed to. Design of semiconductorbased back reflectors for high voc. Part 2, multijunction photovoltaic cell design, discusses the interaction of semiconductors, light, and the generation of electricity.
Research article modeling and design of graphene gaas. The electron affinity energy gap between vacuum level. Using microsystem tools, we created sturdy 3 m thick devices with lateral dimensions of 250 m, 500 m, 1 mm, and 2 mm. Modeling and design of graphene gaas junction solar cell. Design and performance of in gaasgaas based tandem solar. Multijunction photovoltaic technologies for high performance. Em microelectronic embc01 beacon 11 solar beacon in a tiny package operates forever as long as there is a few hours of daily light. All solar cells include the latest triple and quadruple junction technology, where gainpgaasge layers are grown on a germanium substrate and the whole product range benefits from many years experience on the space. Design and simulation of a high efficiency ingapgaas multi. Design and experimental characterization of optical wireless.
The tandem structure exhibited better output efficiency. Characterization of production gaas solar cells for space 4. Highefficiency gaas thinfilm solar cell reliability. If so, how can solar cell design then be optimized using modeling and simulation. Rugged reinforced thin cell rtc designintegral bypass diodeno degradation with multiple assembly methods y availabilityin high volume production product description substrate germanium method of gaas growth metal organic vapor phase epitaxy polarity pn thickness 175 m 140 m mass equivalent rtc sizes up to 7 cm x 7 cm weldable. Moreover, an optimization technique has been performed and proposed. The highest efficiency cell had a lateral size of 500 m and a. Pdf the design and optimization of gaas single solar. Structure and modeling as mentioned above, figure shows the cross section of the graphene gaas solar cell simulated using tcad tools. Efficiency improvement study for gaas solar cells final report for period 033180 through 093081 j. The reported nanowireonsi tandem cell opens up great opportunities for highefficiency, lowcost multijunction solar cells. Pdf impact of photon recycling on gaas solar cell designs. The purpose of this work is to design a single solar cell based on gaas that is highly efficient and to investigate its performance.
Design of gaas solar cells with low doped base sciencedirect. Design of iiiv multijunction solar cells on silicon substrate nikhil jain thesis submitted to the faculty of the virginia polytechnic institute and state university in partial fulfillment of the requirements for the degree of master of science in electrical engineering mantu k. Gaas is a very promising for solar cell due to its inherent material properties. The optimization procedure focuses on finding the best combination of gainp bandgap and gainp and gaas sub cell absorber layer thicknesses. According to fullsuns, their current gaas gaas solar cell technology has a maximum conversion rate of 31. Presented at the pv module reliability workshop, february 26 27 20, golden, colorado created date. They successfully obtained spectrally and spatially resolved photoluminescence pl images of a standard gaas solar cell from the fraunhofer institute for solar energy systems ise. It is a iiiv direct band gap semiconductor with a zinc blende crystal structure gallium arsenide is used in the manufacture of devices such as microwave frequency integrated circuits, monolithic microwave integrated circuits, infrared lightemitting diodes, laser diodes, solar cells and optical windows. Some of the impediments to achieving a gaas backcontacted solar cell are the complex layered structure and the difficulties involved in doping gaas from external sources.
Design of highefficiency, radiationhard, gainpgaas. Zehr rockwell international thousand oaks, california 960 prepared by sandia national laboratories albuquerque, new mexico 87185 and livermore, california 94550 for the united states department of energy. Part 2 also focuses on the technology of the national renewable energy laboratory nrel design of a gainp gaas ge triplejunction solar cell that achieved a. The allbackcontact solar cell can reduce the shadow loss. Design of a gainp gaas tandem solar cell for maximum daily, monthly, and yearly energy output alexander w. Oct, 2015 physical design of the mos 2 based solar cell. A 532 nm laser was used to homogeneously illuminate the entire field of view under a microscope objective, allowing the pl signal coming from a million points to. Impact of photon recycling on gaas solar cell designs. A solar cell, or photovoltaic cell, is an electrical device that converts the energy of light directly into electricity by the photovoltaic effect, which is a physical and chemical phenomenon. Ieee journal of photovoltaics 1 design and modeling of. Since gaas has excellent material properties, the optimization of structure design becomes more critical to boost the performance. We designed our solar cell by changing the impurity type and window layer material. From fundamental solar cell physics to computational inverse design by owen dennis miller a dissertation submitted in partial satisfaction of the requirements for the degree of doctor of philosophy in electrical engineering in the graduate division of the university of california, berkeley committee in charge.
Antireflective coating gaas ge single junction solar cells. Power density of gaas solar cell harvests 100 w in artificial light in a small area 5 cm. Pdf design of highefficiency, radiationhard, gainpgaas. In 1961, shockley and queisser showed that the maximum theoretical ef. However, these singlejunction solar cells need more development and optimization for higher conversion efficiency. Backcontacted and small form factor gaas solar cell. Characterization of production gaas solar cells for space. The basic physics and design of iiiv multijunction solar. The fabrication procedure and the results of characterization tests are discussed below. Ingaas gaas based solar cells have been designed with structural modification and evaluated their performances.
We present the results of the fabrication and characterization of gaas solar cell with a swcnt top contact. Design of freebarrier ingaasganas multiple quantum well. Heterogeneous integration of iiiv multijunction solar. I ntroduction the possibility of approaching the shockleyqueisser efficiency limit by enhancing the photon recycling in the solar cell, as predicted by theory 1, was recently demonstrated experimentally by alta devices for a gaas singlejunction cell 2. To date, the gaas solar battery cell has been commercialized for consumer use, and a superior production technology has been established for it. Rugged reinforced thin cell rtc design integral bypass diodeno degradation with multiple assembly methods. The design and optimization of gaas single solar cells.
Graphene based gaas junction solar cell is modeled and investigated by silvaco tcad tools. Therefore, within a relatively short time, a highly efficient 17. Pdf the design and optimization of gaas single solar cells. A presentation and comparison of obtained results to similar solar devices from recent publication have been done. We examine the contact between the swcnt film and the semiconductor structure by. Space solar cells offer high efficiencies, starting from the 28% class and ending in the highend cell class of 32% advanced. The schematic electronic band structure of the independent mos 2 and gaas is shown in fig. The results show that the most effective region for photo photogenerated. Therefore, we try optimize the design of allbackcontact gaas solar cells in this paper. Singlejunction solar cells are the most available in the market and the most simple in terms of the realization and fabrication comparing to the other solar devices. Interface designed mos 2 gaas heterostructure solar cell. Highefficiency gaas thinfilm solar cell reliability author. The photovoltaic behaviors have been investigated considering structure and process parameters such as substrate thickness, dependence between graphene work function and transmittance, and ntype doping concentration in gaas.
Ultrahighefficiency solar cell and receiver module. According to our recently developed semianalytical model, this. The design and optimization of gaas single solar cells using the genetic algorithm and silvaco atlas article pdf available in international journal of photoenergy 2017. Combining 1d and 2d waveguiding in an ultrathin gaas nwsi tandem solar cell. Performing organization name and address jet propulsion laboratory california institute of technology 4800 oak grove drive pasadena, california 91109 12. In this work, a gainp gaas tandem solar cell is designed for maximum energy production by optimizing for a set of geographicallydependent solar spectra using detailed numerical models. The temperature variation affects these parameters and, hence, the performance of solar cells 18.
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