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Graded alloy telluride layer in cadmium telluride thin film photovoltaic devices and methods of manufacturing the same

A thin-film photovoltaic and cadmium telluride technology, which is applied in photovoltaic power generation, semiconductor devices, and final product manufacturing, can solve problems such as increasing device degradation rate, reducing energy conversion efficiency, and poor contact between metal electrodes and cadmium telluride layer

Inactive Publication Date: 2011-08-03
PRIMESTAR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, one problem with CdTe PV devices is poor contact of the metal electrodes with the cadmium telluride layer
This contact problem can lead to significantly reduced energy conversion efficiency in the device, and can lead to increased degradation rates of the device

Method used

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  • Graded alloy telluride layer in cadmium telluride thin film photovoltaic devices and methods of manufacturing the same
  • Graded alloy telluride layer in cadmium telluride thin film photovoltaic devices and methods of manufacturing the same
  • Graded alloy telluride layer in cadmium telluride thin film photovoltaic devices and methods of manufacturing the same

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Embodiment Construction

[0018] Reference will now be made in detail to embodiments of the invention, one or more examples of which are illustrated in the drawings. Each example is provided by way of explanation of the invention, not limitation of the invention. In fact, it will be apparent to those skilled in the art that various modifications and changes can be made in the present invention without departing from the scope and spirit of the invention. For example, features illustrated or described as part of one embodiment can be used with another embodiment to yield still a further embodiment. Thus, it is intended that the present invention includes such modifications and variations as come within the scope of the appended claims and their equivalents.

[0019] In this disclosure, when layers are described as being "on" or "over" another layer or substrate, it is understood that the layers can be directly contacting each other or have another layer or feature interposed. Thus, these terms simply ...

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Abstract

Cadmium telluride thin film photovoltaic devices (10) are generally disclosed including a graded alloy telluride layer (22). The device can include a cadmium sulfide layer (18), a graded alloy telluride layer (22) on the cadmium sulfide layer (18), and a back contact (24) on the graded alloy telluride layer (22). The graded alloy telluride layer (22) generally has an increasing alloy concentration and decreasing cadmium concentration extending in a direction from the cadmium sulfide layer (18) towards the back contact layer (24). The device (10) may also include a cadmium telluride layer (20) between the cadmium sulfide layer (18) and the graded alloy telluride layer (22). Methods are also generally disclosed for manufacturing a cadmium telluride based thin film photovoltaic device having a graded cadmium telluride structure.

Description

technical field [0001] The subject matter disclosed herein relates generally to cadmium telluride thin film photovoltaic devices and methods of their manufacture. More specifically, the subject matter disclosed herein relates to cadmium telluride thin film photovoltaic devices having a graded alloy telluride layer on a cadmium telluride layer. Background technique [0002] Thin-film photovoltaic (PV) modules (also referred to as "solar panels") based on cadmium telluride (CdTe) paired with cadmium sulfide (CdS) as the photoreactive component are gaining wide acceptance and attention within the industry. CdTe is a semiconducting material with properties particularly suitable for converting solar energy into electricity. For example, CdTe has an energy bandgap of about 1.45eV, which enables it to convert more energy from the solar spectrum than lower-bandgap semiconductor materials (e.g., 1.1eV for silicon) historically used in solar cell applications. energy. Also, CdTe co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/048H01L31/18C23C14/06C23C16/30
CPCH01L31/0296H01L31/073H01L31/1836C23C14/0629H01L31/065H01L31/02966Y02E10/50Y02E10/543Y02P70/50
Inventor S·D·费尔德曼-皮博迪
Owner PRIMESTAR
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