Method and apparatus for evaluating solar cell and use thereof

A technology of solar cells and evaluation methods, which is applied in the field of solar cell evaluation and evaluation devices and its utilization, and can solve problems such as greater influence on component performance

Inactive Publication Date: 2007-11-07
NARA INSTITUTE OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when a polycrystalline semiconductor is used, since in-plane distribution occurs, the device performance is greatly affected, and a more precise evaluation is required than a single crystal.

Method used

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  • Method and apparatus for evaluating solar cell and use thereof
  • Method and apparatus for evaluating solar cell and use thereof
  • Method and apparatus for evaluating solar cell and use thereof

Examples

Experimental program
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Embodiment

[0175] For the Si solar cell element composed of polycrystalline silicon semiconductor, inject 5~40mA / cm in the forward direction 2 current and analyze it. In this example, a radio microscope (PHEMOS-200, manufactured by Hamamatsu Photon Co., Ltd.) was used. The size of the Si solar cell element used was 1 cm×1 cm. First, images obtained by photographing the state of the Si solar cell element at the time of injecting a current are shown in FIGS. 5( a ) and 5 ( b ). FIG. 5( a ) is a diagram showing the state of light emission of the Si solar cell element, and FIG. 5( b ) is a diagram showing the diffusion length of minority carriers (electrons) in the Si solar cell element.

[0176] As shown in FIG. 5( a ), it is known that when a current is injected into the Si solar cell element, the Si solar cell element emits intense light. and. The part that looks whitish is a region that emits strongly, and the part that appears black is a region that emits weakly (and, in the case of...

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Abstract

Disclosed is a method for evaluating the performance of a solar cell which comprises a silicon semiconductor as the main component. This method comprises a current introduction step for introducing a direct current into a solar cell element constituting the solar cell in the forward direction, and an emission sensing step for sensing emission characteristics of the light emitted from the solar cell element due to the current introduction step. By this method, the photoelectric conversion performance of a solar cell can be simply and accurately evaluated without requiring large-sized equipment.

Description

technical field [0001] The present invention relates to a solar cell evaluation method, evaluation device, and utilization thereof that can easily and accurately evaluate the photoelectric conversion performance of a solar cell without using a large-scale detector, and particularly relates to conduction of a current to a constituent solar cell ( For example, a solar cell module, a solar cell panel, or a solar cell element itself), a solar cell evaluation method and a method for simply and accurately evaluating the photoelectric conversion performance of a solar cell by analyzing the light emission characteristics generated at this time and Evaluation devices and their utilization. Background technique [0002] In order to protect the global environment and promote the use of solar energy, it has been promoted to attach a solar cell module composed of solar cell elements connected with a plurality of solar cells to the roof and side wall of a general building or building. Ho...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): G01J1/00G01M11/00H01L21/66H01L31/04
CPCG01R31/2605G01J1/08H01L31/186H02S50/10G01N21/66G01J2001/4247Y02B10/12Y02E10/50Y02B10/10Y02P70/50
Inventor冬木隆
OwnerNARA INSTITUTE OF SCIENCE AND TECHNOLOGY