Solar cell

a solar cell and solar cell technology, applied in the field of solar cells, can solve the problems of low efficiency, disadvantageous single-layered solar cells, and inefficient solar cells with a large band gap between the host material and the host material

Inactive Publication Date: 2012-05-03
SAMSUNG SDI CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The multi-stacked solar cell design effectively absorbs a wide range of sunlight wavelengths, achieving higher efficiency and enabling the production of large-sized solar cells on a glass substrate at a lower cost, with maximum efficiency increased to about 72% compared to traditional designs.

Problems solved by technology

However, a single-layered solar cell is disadvantageous, because it has low efficiency.
For example, a solar cell with a host material having a large band gap is inefficient, because it cannot absorb light having energy smaller than the band gap.
In contrast, a solar cell with a host material having a small band gap is also inefficient, because (although it can absorb light having energy larger than the band gap) the surplus energy beyond the band gap is lost as heat.
Of the host materials used in single-layered solar cells, CdTe has the highest efficiency of 31%, but this is still relatively low.
Accordingly, there is increased difficultly and costs associated with the manufacture of large-sized p-n junctions and large-sized solar cells.

Method used

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Embodiment Construction

[0036]A more detailed description of various example embodiments is provided herein. However, specific structural and functional details disclosed herein are merely representative for purposes of describing example embodiments. Example embodiments may be embodied in many alternate forms and should not be construed as limited to only the embodiments set forth herein.

[0037]Accordingly, while example embodiments are capable of various modifications and alternative forms, embodiments thereof are shown by way of example in the drawings and will herein be described in detail. It should be understood, however, that there is no intent to limit example embodiments to the particular forms disclosed, but to the contrary, example embodiments are to cover all modifications, equivalents, and alternatives falling within the scope of example embodiments. Like numbers refer to like elements throughout the specification.

[0038]It will be understood that, although the terms first, second, etc. may be u...

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Abstract

Disclosed are a relatively high-efficiency solar cell and a method for fabricating the same using a micro-heater array. The solar cell may include first and second micro-heaters intersecting each other or being parallel to each other on a substrate, and a plurality of InxGa1-xN p-n junction layers formed using the first and second micro-heaters. The solar cell has improved efficiency because sunlight with various wavelengths may be effectively absorbed by the plurality of InxGa1-xN p-n junction layers. Furthermore, relatively large-sized solar cells may be fabricated, because the plurality of InxGa1-xN p-n junction layers may be formed on a glass substrate using a micro-heater array.

Description

CROSS REFERENCE TO RELATED U.S. APPLICATION[0001]This is a continuation application based on pending application Ser. No. 12 / 320,924, filed Feb. 9, 2009, the entire contents of which is hereby incorporated by reference.CROSS-REFERENCE TO RELATED PRIORITY APPLICATION[0002]This application claims priority under 35 U.S.C. §119 to Korean Patent Application No. 10-2008-0032072, filed Apr. 7, 2008, the entire disclosure of which is incorporated herein by reference.BACKGROUND[0003]1. Field[0004]Example embodiments relate to solar cells and methods for fabricating the same.[0005]2. Description of the Related Art[0006]Conventionally, a p-n junction is used not only as a diode for rectifying operations but also for opto-electronic devices (e.g., solar cells, light emitting diodes (LEDs), and image sensors). When fabricating p-n junctions for general-use single-layered solar cells, silicon (Si) is used as the host material, and phosphorous (P) and boron (B) may be added as n-type and p-type do...

Claims

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Application Information

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Patent Type & AuthorityApplications(United States)
IPC IPC(8): H01L31/0687H01L31/0232
CPCH01L31/03046Y02E10/544H01L31/1844H01L31/0735H01L31/042
InventorCHOI, JUNHEEHAN, JAI YONGZOULKARNEEV, ANDREI
OwnerSAMSUNG SDI CO LTD