Thin-film technology development for the PowerSphere

Simburger, Edward J.; Matsumoto, James H.; Giants, Thomas W.; García, Alexander; Liu, Simon; Rawal, Shristi; Perry, Alan R.; Marshall, Charles A.; Lin, John; Scarborough, Stephen; Curtis, H. B.; Kerslake, Thomas W.; Peterson, Todd

doi:10.1016/j.mseb.2004.09.035

Cited by 9 publications

(8 citation statements)

References 1 publication

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“…, where the photo-induced current can be written [9]: (1) where is the photo-induced carrier mobility and L the sample dimensions. In the region of the derivative is linear and equal to so that one can deduce the product.…”

Section: Discussionmentioning

confidence: 99%

“…1 we show a plot comparing SP for Si based cells as a function of the cell efficiency. This data is taken from a 2005 publication [1]. We note that the lines are extrapolations drawn so as to emphasize that for any chosen efficiency the specific power of thin film cells is superior to that of crystalline cells.…”

Section: Introductionmentioning

confidence: 99%

“…However, these devices can be rapidly assembled and deployed individually or in large numbers. In such small volumes it is hard to imagine the stowage of rigid or semi-rigid solar panels and there is a good case to be argued for inflatable "power spheres" [1] which could be rapidly assembled using flexible photo-voltaic materials such as solution depositable organic semiconductors. Though presently such cells have efficiencies 5% [3] they are expected to have extremely large specific powers.…”

Section: Introductionmentioning

confidence: 99%

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Origin of Radiation Induced Damage in Organic P3HT:PCBM Based Photocells

Devine

Mayberry

Kumar

et al. 2010

IEEE Trans. Nucl. Sci.

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Organic semiconductor photocells based upon P3HT:PCBM (1:1 by weight) have been subjected to X irradiation. The carrier lifetime has been determined using a pulsed optical method with continuous light to generate an open circuit voltage bias. No effect is observed on the carrier lifetime up to 300 krad (SiO 2 ). However, changes in the open circuit voltage are observed and we argue that these result from compensation of the internal field which results from the built-in potential. The origin of the field modifications must lay in the presence of radiation induced trapped charge near the organic semiconductor/anode and/or cathode interfaces.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Origin of Radiation Induced Damage in Organic P3HT:PCBM Based Photocells

Devine

Mayberry

Kumar

et al. 2010

IEEE Trans. Nucl. Sci.

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“…An option for '3-dimensional deployment' eliminates the need for solar tracking and allows for stronger omnidirectional communications. LISA-T builds upon previously published concepts, such as the PowerSphere [2], Inflatable Torus Solar Array Technology (ITSAT) [3,4], and others [5,6,7,8,9] utilizing new engineering concepts and the latest advancements in thinfilm materials, devices, and deployment options. The project leverages several existing and on-going efforts at Marshall Space Flight Center (MSFC) for design, development, fabrication, and test.…”

Section: Introductionmentioning

confidence: 99%

Advancements of the Lightweight Integrated Solar Array and Transceiver (LISA-T) Small Spacecraft System

Lockett

Martinez

Boyd

et al. 2015

2015 IEEE 42nd Photovoltaic Specialist Conference (PVSC)

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This paper describes recent advancements of the Lightweight Integrated Solar Array and Transceiver (LISA-T) currently being developed at NASA's Marshall Space FlightCenter. The LISA-T array comprises a launch stowed, orbit deployed structure on which thin-film photovoltaic (PV) and antenna devices are embedded. The system provides significant electrical power generation at low weights, high stowage efficiency, and without the need for solar tracking. Leveraging high-volume terrestrial-market PVs also gives the potential for lower array costs. LISA-T is addressing the power starvation epidemic currently seen by many small-scale satellites while also enabling the application of deployable antenna arrays. Herein, an overview of the system and its applications are presented alongside sub-system development progress and environmental testing plans.

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“…[17] MgF 2 films are also interesting due to their applications to produce multilayers with conducting materials (Ag) [18] suited for protective coatings, electromagnetic shielding, [19] and solar cells. [20] To date, various methods have been used for fabricating MgF 2 thin films, including plasma ion assisted deposition, [21] molecular beam epitaxy (MBE), [22] physical vapor deposition (PVD), [23] ion beam sputtering (IBS), [24] sol-gel, [25] and atomic layer deposition (ALD). [26] ALD presents the benefits of high control of the layer thickness and also high uniformity, excellent step coverage, and high reproducibility.…”

Section: Introductionmentioning

confidence: 99%

MOCVD Fabrication of Magnesium Fluoride Films: Effects of Deposition Parameters on Structure and Morphology

Fragalà¹,

Toro²,

Privitera³

et al. 2011

Chemical Vapor Deposition

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Magnesium fluoride (MgF 2 ) films are fabricated via low pressure metal-organic (MO)CVD on glass or quartz substrates from the novel single-source precursor Mg(hfa) 2 Á 2H 2 O Á 2diglyme. The nature and quality of films are scrutinized depending on relevant operational parameters, namely the deposition temperature, the precursor vaporization rate, and finally the flow of the oxygen reacting gas. Grazing incidence X-ray diffraction (GIXRD) data point to the formation of crystalline MgF 2 films. Scanning electron microscope (SEM) images indicate very homogeneous surfaces with grain dimensions dependent upon operational conditions, while energy dispersive X-ray (EDX) analyses point to the absence of any C or O contaminants. Smooth and homogeneous surfaces can be obtained upon deposition under high oxygen flow. The MgF 2 film deposited on glass at 400 8C under optimized conditions shows a $80% transmittance in the range 300 À 800 nm. The high crystalline and optical quality of the MgF 2 films, deposited using mild deposition temperatures (< 450 8C) still confirms MOCVD as a versatile and competitive deposition technique.

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Thin-film technology development for the PowerSphere

Cited by 9 publications

References 1 publication

Origin of Radiation Induced Damage in Organic P3HT:PCBM Based Photocells

Origin of Radiation Induced Damage in Organic P3HT:PCBM Based Photocells

Advancements of the Lightweight Integrated Solar Array and Transceiver (LISA-T) Small Spacecraft System

MOCVD Fabrication of Magnesium Fluoride Films: Effects of Deposition Parameters on Structure and Morphology

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