Thanks to GaAs tunnel junction technology, we offer epi wafers of single-junction and dual-junction InGaP/GaAs solar cells,with different structures of epitaxial layers (AlGaAs,InGaP) grown on GaAs for solar cell application.And now we offer a epi wafer structure with InGaP tunnel junction as follows:
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AR coating MgF2/ZnS |
Au |
Frount contact |
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Au-Ge/Ni/Au |
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n+-GaAs 0.3μm |
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┏ |
n+-AlInP 0.03 μm <2×1018cm-3(Si) |
Window |
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InGaP |
n+-InGaP 0.05μm 2.0×1018cm-3(Si) |
n |
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(Eg=1.88eV) |
p+-InGaP 0.55μm 1.5×1017cm-3(Zn) |
p |
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top cell |
p+-InGaP 0.03μm 2.0×1018cm-3(Zn) |
p+ |
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p+-AlInP 0.03μm ＜5×1017cm-3(Zn) |
BSF,diff.barrier |
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Tunnel |
p+-InGaP 0.015μm 8.0×1018cm-3(Zn) |
TN(p+) |
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junction |
n+-InGaP 0.015μm 1.0×1019cm-3(Si) |
TN(n+) |
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n+-AlInP 0.05μm 1.0×1019cm-3(Si) |
Window,diff.barrier |
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GaAs (Eg=1.43 eV) bottom cell |
n+-GaAs 0.1μm 2.0×1018cm-3(Si) |
n |
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p -GaAs 3.0μm 1.0×1017cm-3(Zn) |
p |
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p+-InGap 0.1μm 2.0×1018cm-3(Zn) |
BSF |
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p+-GaAs 0.3μm 7.0×1018cm-3(Zn) |
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p+-GaAs substrate ＜1.0×1019cm-3(Zn) |
substrate |
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Au |
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Back contact |
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Note:LEDs, LASERs and Multi-junction Solar Cells can all employ tunnel junctions to improve performance. Calculating the effects of this junction is tricky, but there are ways to accurately simulate chip characteristics and cost-effectively optimize the structure’s design.
Source: semiconductorwafers.net
For more information, please visit our website:http://www.semiconductorwafers.net,
send us email at angel.ye@powerwaywafer.com or powerwaymaterial@gmail.com.
Contact Information
luna@powerwaywafer.compowerwaymaterial@gmail.com 
+86-592-5601 404
