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Whitepapers & Technical Articles

10
Mar

SolAero’s latest generation InGaP/InGaAs/Ge ZTJ triple-junction space-grade high-efficiency solar cells have been in volume production since 2009, with over 300,000 flight cells produced to power more than 35 separate satellites. The ZTJ cells, CICs (Coverglass-Interconnected-Cell) and solar panels have also been characterized and qualified to both the AIAA-S-111 and AIAA-S-112 standards. More than 10 life-cycle […]

13
Jan

The Solar Probe Plus (SPP) spacecraft will fly further into the Sun’s corona than any previous mission, reaching a minimum perihelion at 9.5 solar radii from the center of the Sun. The solar arrays powering the spacecraft will operate under unusually high irradiances and temperatures. The array design, material choices, and necessary test facilities for […]

13
Jan

Intermediate band solar cells using quantum dots (QDs) have been proposed as an approach to increasing solar cell efficiency [1]. This paper presents results of attempts to grow QDs in the GaAs middle cell of lattice matched triple junction solar cells by Metal-Organic Chemical Vapor Deposition (MOCVD). QD size and density as a function of […]

13
Jan

This paper discusses results from continued development of Inverted Metamorphic Multi-junction (IMM) solar cells with air mass zero (AM0) conversion efficiencies greater than 34%. An experimental best four-junction IMM (IMM4J) design is presented. In an effort to improve IMM performance in space radiation environments, 1-MeV electron irradiation studies are conducted on the individual IMM4J subcells. […]

13
Jan

The six-junction inverted metamorphic multi-junction (IMM6J) solar cell has been identified as a viable path towards air mass zero (AM0) conversion efficiencies in excess of 37% (1-sun, AM0, 28ºC, 1353 mW/cm2). The design of the IMM6J device architecture is presented in this paper. Initial experimental results of the IMM6J are presented, including an experimental best […]

13
Jan

A primary goal of terrestrial photovoltaics is to reach grid cost parity. This is a difficult task, largely due to the seemingly inverse relationship between efficiency and cost. Multi-junction III/V solar cells on an active Si substrate may break this relationship by providing high efficiency with much lower material cost than traditional concentrator solar cells. […]

13
Jan

Lattice matched, triple-junction solar cells with strain compensated quantum dots (QDs) in the GaAs middle cell were grown by Metal-Organic Chemical Vapor Deposition (MOCVD). Devices with different numbers of QD layers are compared to baseline devices with no QDs. Quantum efficiency and light I-V measurements show an increase in short circuit current density and degradation […]

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