Search Results - "Ward, J. Scott"
-
1
Techno-economic analysis of three different substrate removal and reuse strategies for III-V solar cells
Published in Progress in photovoltaics (01-09-2016)“…The high cost of wafers suitable for epitaxial deposition of III‐V solar cells has been a primary barrier to widespread use of these cells in low‐concentration…”
Get full text
Journal Article -
2
Raising the one-sun conversion efficiency of III–V/Si solar cells to 32.8% for two junctions and 35.9% for three junctions
Published in Nature energy (25-08-2017)“…Today’s dominant photovoltaic technologies rely on single-junction devices, which are approaching their practical efficiency limit of 25–27%. Therefore,…”
Get full text
Journal Article -
3
Quadruple-Junction Inverted Metamorphic Concentrator Devices
Published in IEEE journal of photovoltaics (01-01-2015)“…We present results for quadruple-junction inverted metamorphic (4J-IMM) devices under the concentrated direct spectrum and analyze the present limitations to…”
Get full text
Journal Article -
4
Design Flexibility of Ultrahigh Efficiency Four-Junction Inverted Metamorphic Solar Cells
Published in IEEE journal of photovoltaics (01-03-2016)“…The inverted metamorphic solar cell has highly tunable bandgaps, in part due to the metamorphic subcells. Using phosphide-based compositionally graded buffers,…”
Get full text
Journal Article -
5
Optically Enhanced Photon Recycling in Mechanically Stacked Multijunction Solar Cells
Published in IEEE journal of photovoltaics (01-01-2016)“…Multijunction solar cells can be fabricated by mechanically bonding together component cells that are grown separately. Here, we present four-junction…”
Get full text
Journal Article -
6
High aspect ratio electrodeposited Ni/Au contacts for GaAs-based III-V concentrator solar cells
Published in Progress in photovoltaics (01-05-2015)“…We report on a photolithographic and electro‐deposition process that results in an optimized front grid structure for high efficiency multi‐junction III–V…”
Get full text
Journal Article -
7
Pushing Inverted Metamorphic Multijunction Solar Cells Toward Higher Efficiency at Realistic Operating Conditions
Published in IEEE journal of photovoltaics (01-04-2013)“…A unique aspect of the inverted metamorphic multijunction (IMM) solar cell is the bandgap tunability of each junction, creating extremely flexible device…”
Get full text
Journal Article -
8
Modeled performance of polycrystalline thin-film tandem solar cells
Published in Progress in photovoltaics (01-05-2002)“…The optimum bandgaps for two‐terminal monolithic multijunction devices have typically been studied under a fixed set of environmental conditions, using ideal…”
Get full text
Journal Article -
9
Design flexibility of ultra-high efficiency 4-junction inverted metamorphic solar cells
Published in 2015 IEEE 42nd Photovoltaic Specialist Conference (PVSC) (01-06-2015)“…We present recent improvements to the 4-junction inverted metamorphic solar cell. The device now includes a (Ga)InAsP buffer that transitions to lattice…”
Get full text
Conference Proceeding Journal Article -
10
Techno-economic analysis of three different substrate removal and reuse strategies for III-V solar cells: Techno-economic analysis for III-V solar cells
Published in Progress in photovoltaics (10-05-2016)“…The high cost of wafers suitable for epitaxial deposition of III-V solar cells has been a primary barrier to widespread use of these cells in low-concentration…”
Get full text
Journal Article -
11
Mechanically stacked four-junction concentrator solar cells
Published in 2015 IEEE 42nd Photovoltaic Specialist Conference (PVSC) (01-06-2015)“…Multijunction solar cells can be fabricated by bonding together component cells that are grown separately. Because the component cells are each grown…”
Get full text
Conference Proceeding -
12
Reconceptualizing Establishment Clause Cases As Free Exercise Class Actions
Published in The Yale law journal (01-06-1989)“…First Amendment establishment clause decisions have elicited at least as much commentary as other areas of Supreme Court jurisprudence. The establishment…”
Get full text
Journal Article -
13
Critical issues in the design of polycrystalline, thin-film tandem solar cells
Published in Progress in photovoltaics (01-09-2003)“…We use an empirical technique for modeling the efficiency of thin‐film tandem solar cells and calculate an approximate upper limit on the range of performance…”
Get full text
Journal Article -
14
Optically enhanced photon recycling in mechanically stacked multijunction solar cells
Published in IEEE journal of photovoltaics (09-11-2015)“…Multijunction solar cells can be fabricated by mechanically bonding together component cells that are grown separately. Here, we present four-junction…”
Get full text
Journal Article -
15
Mechanically stacked 4-terminal III-V/Si tandem solar cells
Published in 2017 IEEE 44th Photovoltaic Specialist Conference (PVSC) (01-06-2017)“…We developed 4-terminal III-V/Si dual-junction solar cells that reach certified record 1-sun efficiencies over 32%. These efficiency values exceed the…”
Get full text
Conference Proceeding -
16
Pushing inverted metamorphic multijunction solar cells toward higher efficiency at realistic operating conditions
Published in 2012 IEEE 38th Photovoltaic Specialists Conference (PVSC) PART 2 (01-06-2012)“…A unique aspect of the inverted metamorphic multijunction (IMM) solar cell is the bandgap tunability of each junction, creating extremely flexible device…”
Get full text
Conference Proceeding -
17
A new thin-film CuGaSe2/Cu(In, Ga)Se2 bifacial, tandem solar cell with both junctions formed simultaneously
Published in sans titre (2002)Get full text
Conference Proceeding