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Results for “Au-Zn”

Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.

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6 records
All sourcesNASA NTRSDOE OSTI
NASA NTRS1989

Fabrication of n(+)/p InP solar cells on silicon substrates

InP films were grown by MOCVD on Si GaAs substrates (as well as on InP substrates, included as controls), and were used to fabricate solar cells, using the Spitzer et al. (1987) technique. Contact to the substrate was made with Al-Ti-Pd-Ag to the Si wafers and with Au-Zn alloy to the GaAs wafers, while contract to the front was made with Cr-Au-Ag. Air mass zero efficiencies were found to be 7.1 percent for Si-substrate cells and 9.4 percent for GaAs-substrate cells.

Keavney, C. J.↗
NASA NTRS1993

Progress in p(+)n InP solar cells fabricated by thermal diffusion

The performance results of our most recently thermally diffused InP solar cells using the p(+)n (Cd,S) structures are presented. We have succeeded in fabricating cells with measured AMO, 25 C V(sub oc) exceeding 880 mV (bare cells) which to the best of our knowledge is higher than previously reported V(sub oc) values for any InP homojunction solar cells. The cells were fabricated by thinning the emitter, after Au-Zn front contacting, from its initial thickness of about 4.5 microns to about 0.6 microns. After thinning, the exposed surface of the emitter was passivated by a thin (approximately 50A) P-rich oxide. Based on the measured EQY and J(sub sc)-V(sub oc) characteristics of our experimental high V(sub oc) p(+)n InP solar cells, we project that reducing the emitter thickness to 0.3 microns, using an optimized AR coating, maintaining the surface hole concentration of 3 x 10(exp 18)cm(sup -3), reducing the grid shadowing from actual 10.55 percent to 6 percent and reducing the contact resistance will increase the actual measured 12.57 percent AMO 25 C efficiency to about 20.1 percent. By using our state-of-the-art p(+)n structures which have a surface hole concentration of 4 x 10(exp 18)cm(sup -3) and slightly improving the front surface passivation, an even higher practically achievable AMO, 25 C efficiency of 21.3 percent is projected.

Flood, D. J.↗
DOE OSTI2020

Materials Data on ZnAu by Materials Project

AuZn is Tetraauricupride structured and crystallizes in the cubic Pm-3m space group. The structure is three-dimensional. Au is bonded in a body-centered cubic geometry to eight equivalent Zn atoms. All Au–Zn bond lengths are 2.77 Å. Zn is bonded in a body-centered cubic geometry to eight equivalent Au atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on ZnAu3 by Materials Project

Au3Zn crystallizes in the orthorhombic Cmce space group. The structure is three-dimensional. there are three inequivalent Au sites. In the first Au site, Au is bonded in a distorted bent 120 degrees geometry to two equivalent Zn atoms. Both Au–Zn bond lengths are 2.72 Å. In the second Au site, Au is bonded in a distorted square co-planar geometry to four equivalent Zn atoms. There are two shorter (2.87 Å) and two longer (2.91 Å) Au–Zn bond lengths. In the third Au site, Au is bonded in a 12-coordinate geometry to four equivalent Zn atoms. There are two shorter (2.78 Å) and two longer (2.79 Å) Au–Zn bond lengths. Zn is bonded in a distorted q6 geometry to ten Au atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Zn3Au by Materials Project

AuZn3 crystallizes in the cubic Pm-3n space group. The structure is three-dimensional. there are two inequivalent Au sites. In the first Au site, Au is bonded to twelve equivalent Zn atoms to form a mixture of distorted face and edge-sharing AuZn12 cuboctahedra. There are four shorter (2.71 Å) and eight longer (2.87 Å) Au–Zn bond lengths. In the second Au site, Au is bonded to twelve equivalent Zn atoms to form face-sharing AuZn12 cuboctahedra. All Au–Zn bond lengths are 2.73 Å. Zn is bonded in a 4-coordinate geometry to four Au atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on ZnAu3 by Materials Project

Au3Zn crystallizes in the tetragonal I4_1/acd space group. The structure is three-dimensional. there are three inequivalent Au sites. In the first Au site, Au is bonded in a distorted bent 120 degrees geometry to two equivalent Zn atoms. Both Au–Zn bond lengths are 2.74 Å. In the second Au site, Au is bonded in a 12-coordinate geometry to four equivalent Zn atoms. There are two shorter (2.79 Å) and two longer (2.80 Å) Au–Zn bond lengths. In the third Au site, Au is bonded in a distorted square co-planar geometry to four equivalent Zn atoms. All Au–Zn bond lengths are 2.87 Å. Zn is bonded in a distorted q6 geometry to ten Au atoms.

36 MATERIALS SCIENCE↗