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Multijunction solar cell having patterned emitter and method of making the solar cell

A technology of solar cells and solar sub-cells, applied in photovoltaic power generation, circuits, electrical components, etc., can solve problems such as reducing the efficiency of solar cells

Active Publication Date: 2018-06-29
THE BOEING CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

While the blanket diffusion process used to form the emitter provides an easy way to fabricate the lower subcell, this emitter configuration provides a non-ideal path for the loss of photogenerated carriers, which reduces the efficiency of the solar cell

Method used

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  • Multijunction solar cell having patterned emitter and method of making the solar cell
  • Multijunction solar cell having patterned emitter and method of making the solar cell
  • Multijunction solar cell having patterned emitter and method of making the solar cell

Examples

Experimental program
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Embodiment 1

[0054] Embodiment 1. A multi-junction solar cell comprising: a base substrate comprising a Group IV semiconductor and a dopant of a first carrier type; a patterned emitter formed at a first surface of the base substrate, The patterned emitter includes a plurality of well regions doped with a dopant of the second carrier type in the Group IV semiconductor, the base substrate includes the patterned emitter forming the first solar subcell; and the upper structure includes One or more additional solar subcells above the first solar subcell.

Embodiment 2

[0055] Embodiment 2. The multi-junction solar cell of embodiment 1, further comprising a passivation layer at the first surface of the base substrate positioned between the patterned emitter well regions and comprising a second A carrier type dopant.

Embodiment 3

[0056] Embodiment 3. The multijunction solar cell of embodiment 1 or 2, wherein the Group IV semiconductor comprises a material selected from germanium and silicon.

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Abstract

The application discloses a multijunction solar cell having a patterned emitter and a method of making the solar cell. The multijunction solar cell includes a base substrate comprising a Group IV semiconductor and a dopant of a first carrier type. A patterned emitter is formed at a first surface of the base substrate. The patterned emitter comprises a plurality of well regions doped with a dopantof a second carrier type in the Group IV semiconductor. The base substrate including the patterned emitter form a first solar subcell. The multijunction solar cell further comprises an upper structurecomprising one or more additional solar subcells over the first solar subcell. Methods of making a multijunction solar cell are also described.

Description

technical field [0001] The present disclosure relates to a multi-junction solar cell employing a patterned emitter and a method of making the solar cell. Background technique [0002] Improved solar cell efficiency is an ongoing goal of solar cell manufacturers. Providing multiple solar cell junctions in a single solar cell is a known method for increasing efficiency. Such multi-junction solar cells may include a lower subcell formed in a germanium substrate. One or more additional junctions are formed over the lower subcell. FIG. 1 shows an example of one such conventional multi-junction solar cell 10 having a p-type germanium substrate 12 with a diffused emitter region 18 . A GaInAs middle subcell 14 and a GaInP top subcell 16 are formed on the substrate 12 as part of a monolithic semiconductor stack. The middle subcell 14 and the top subcell 16 include a second junction and a third junction (not shown) in addition to the first junction provided by the emitter region 1...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/076H01L31/0224H01L31/18
CPCH01L31/022425H01L31/076H01L31/1844H01L31/1876H01L31/061H01L31/078H01L31/18Y02E10/52Y02E10/549Y02E10/547H01L31/03529H01L31/1804Y02E10/541Y02E10/548Y02E10/544Y02P70/50H01L31/0352H01L31/035209H01L31/035236H01L31/1808H01L31/02167H01L31/028H01L31/0296H01L31/0304H01L31/03046H01L31/0322H01L31/0725H01L31/074H01L31/184H01L31/1868
Inventor C·M·费策尔P·赫伯特
Owner THE BOEING CO
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