Emitter-less, back-surface alternating-contact solar cell
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United States of America Patent
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-
Jan 9, 2018
Issued Date -
N/A
app pub date -
Sep 30, 2016
filing date -
May 4, 2016
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
The disclosure provides an emitter-less solar cell design featuring p-or-n type GaAs with alternating p-n junction regions on the back-surface of the cell, opposite incident solar irradiance. Various layers of p-or-n type GaAs are interfaced together to collect charge carriers, and a thin layer of AlGaAs is applied to the front and back surfaces to prevent recombination of charge carriers. In some embodiments, the layered and doped structure generally provides an AlGaAs window layer of about 20 nm doped to about 3×(1018) cm−3, a GaAs absorption layer of about 1200 nm doped to about 2×(1017) cm−3, an AlGaAs heterojunction layer of about 20 nm doped to about 3×(1018) cm−3, and a GaAs contact layer of about 20 nm doped to about 1×(1019) cm−3. Additionally, AlGaAs BSF-heterojunction layer and GaAs BSF-contact layers each have a depth of about 20 nm and are doped to about 3×(1018) cm−3 and 1×(1019) cm−3 respectively. The heterojunction layer, and contact layer are doped to a conductivity type opposite the absorption layer.
First Claim
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International Classification(s)
- 2016 Application Filing Year
- H01L Class
- 27971 Applications Filed
- 23507 Patents Issued To-Date
- 84.05 % Issued To-Date
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- 0 Citation Count
- H01L Class
- 0 % this patent is cited more than
- 7 Age
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