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Solar cell and method of fabricating the same

A technology of solar cells and manufacturing methods, applied in circuits, photovoltaic power generation, electrical components, etc., can solve the problems of reduced light absorption of CIGS layer, strong toxicity of Cd, etc., and achieve the effect of improving light transmittance and power generation efficiency

Inactive Publication Date: 2014-09-03
LG INNOTEK CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, Cd is very toxic and exhibits a lower bandgap of 2.4 eV, thus reducing light absorption in the CIGS layer

Method used

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  • Solar cell and method of fabricating the same
  • Solar cell and method of fabricating the same
  • Solar cell and method of fabricating the same

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Embodiment Construction

[0019] In the description of embodiments, it should be understood that when a substrate, layer, film or electrode is referred to as being "on" or "under" another substrate, another layer, another film or another electrode, it may be One or more intermediate layers may also be present "directly" or "indirectly" on another substrate, another layer, another film or another electrode. The location of such components has been described with reference to the drawings. The thickness and size of each component shown in the drawings may be exaggerated, omitted, or schematically drawn for the purpose of convenience. Also, the size of elements does not utterly reflect an actual size.

[0020] The term "HOMO (Highest Occupied Molecular Orbital) level" used in the present disclosure refers to the highest energy level in the valence band. The term "LUMO (Lowest Occupied Molecular Orbital) level" as used in the publication is the lowest energy level of the guide band. The term "bandgap" u...

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Abstract

Disclosed are a solar cell and a method of fabricating the same. The solar cell includes a back electrode layer on a support substrate, a light absorbing layer on the back electrode layer, a buffer layer on the light absorbing layer, and a front electrode layer on the buffer layer.

Description

technical field [0001] Embodiments relate to a solar cell and a method of manufacturing the same. Background technique [0002] A solar cell can be defined as a device that converts light energy into electrical energy by using the photovoltaic effect that generates electrons when light is incident on a P-N junction diode. According to the different materials that make up the junction diode, solar cells can be divided into: silicon solar cells, compound semiconductor solar cells (mainly including I-III-VI compounds or III-V compounds), dye-sensitized solar cells, and organic solar cells . [0003] Solar cells made of CIGS (CuInGaSe), one of the chalcopyrite-based group I-III-VI compound semiconductors, exhibit superior light absorption, high photoelectric conversion efficiency at a thin thickness, and superior Electro-optic stability, so CIGS solar cells have attracted wide attention as an alternative to traditional silicon solar cells. [0004] In general, conventional CI...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/042H01L31/18
CPCH01L31/0749Y02E10/541H01L31/065H01L31/02167H01L31/0445H01L31/18
Inventor 朴起昆
Owner LG INNOTEK CO LTD