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Analysis method of laser damage effect on two-terminal tandem solar cell

A lamination solar and laser damage technology, applied to electrical components, photovoltaic modules, photovoltaic power generation, etc., to achieve the effect of reliable principle and simple method

Active Publication Date: 2019-05-03
NORTHWEST INST OF NUCLEAR TECH
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Problems solved by technology

[0007] The present invention aims to provide a method for analyzing the laser damage effect of two-terminal laminated solar cells based on the dark spectral response, which can be used to calculate and analyze the parallel resistance of the sub-PN junction of the device before and after laser irradiation, so as to solve the problem that the existing analysis methods cannot Problems in Realizing Quantitative Analysis of Sub-PN Junction Performance

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  • Analysis method of laser damage effect on two-terminal tandem solar cell
  • Analysis method of laser damage effect on two-terminal tandem solar cell
  • Analysis method of laser damage effect on two-terminal tandem solar cell

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Embodiment Construction

[0031] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0032] see figure 1 The method for analyzing the laser damage effect of two-terminal tandem solar cells based on the dark spectral response provided by the present invention specifically includes the following steps:

[0033] Step 1: Measure the response characteristics of the dark spectrum in the sub-PN junction absorption band of the three-junction solar cell before and after laser irradiation, and record the maximum response open circuit voltage as V i and V i ′, the maximum response short-circuit current is I i and I i ′, the corresponding dark quantum efficiency is DEQE i and DEQE i ’, where i represents the serial number of the sub-PN junction, i=1, 2, 3; the measurement results refer to image 3 ;

[0034] Step 2: Measure the maximum external quantum efficiency in the sub-PN junction absorption band of the three-junction solar cel...

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Abstract

The invention provides a laser damage effect analysis method for a two-layer stacked solar cell, so as to solve the problem that the existing analysis method cannot realize the quantitative analysis of the sub-PN junction performance, comprising the steps of: firstly acquiring the dark spectral response and the external quantum efficiency spectrum of the two-layer solar cell to be studied, then establishing and solving the linear equations of the sub-PN junction parallel resistance, analyzing the parallel resistance changes of the sub-PN junctions before and after the laser damage, and analyzing the internal damage of the two-layer stacked solar cell combined with the relation thereof with physical quantity in the PN junction.

Description

technical field [0001] The invention relates to a method for analyzing the laser damage effect of a double-ended laminated solar cell. Background technique [0002] A two-terminal tandem solar cell is a high-efficiency solar cell, which is formed by connecting several single-junction cells of different materials in series to realize efficient use of the solar spectrum and improve its conversion efficiency. [0003] At present, there are two main methods for analyzing and evaluating laser damage of two-terminal tandem solar cells: [0004] The first method: use the I-V characteristics of the device under light conditions to calculate the parameters such as open circuit voltage, short circuit current, maximum output power, and fill factor, so as to analyze and evaluate the damage of the device performance; [0005] The second method: using quantum efficiency spectrum, electroluminescence spectrum and other means to analyze the performance change of the sub-PN junction, and th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02S50/15
CPCH02S50/15Y02E10/50
Inventor 窦鹏程冯国斌张检民师宇斌李云鹏徐作冬张震
Owner NORTHWEST INST OF NUCLEAR TECH
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