Universal AC measurement method for external quantum efficiency of solar battery

A technology of solar cells and external quantum efficiency, which is applied in the direction of measuring electricity, measuring devices, and measuring electrical variables, etc., can solve the problem that the accuracy of measuring equipment cannot meet the demand, and achieve the effect of taking into account scalability, high repeatability, and ensuring measurement accuracy

CN101710171BInactive Publication Date: 2012-03-14NANJING UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2012-03-14
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a universal AC measurement method for the external quantum efficiency of a solar battery, which comprises that: an optical part consisting of a xenon light source, a focusing lens and a monochromator supplies monochromatic light; an offset light source provides a working environment for the solar battery; an optical chopper and a phase-locked amplifier use phase-locked technology to measure voltage drops at both ends of a sample resistance; a monochromatic light power meter detects a power of incident monochromatic light; a microcomputer performs instrument control and data processing; and finally, a single-wavelength external quantum efficiency curve of the solar battery is obtained. The invention focuses on the AC measurement method, and the AC measurement method has universality and can be used for various types of solar batteries. The invention also relates to an optoelectronic integrated system, which has the advantages of rapidness and accuracy, reduces the cost of solar battery parameter measurement equipment, improves signal intensity and accuracy, provides more comprehensive battery parameter information, and is used for guiding the improvement onpreparation process and performing research on the mechanism of partly batteries.
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Description

technical field

[0001] The invention relates to the field of application and testing of semiconductor materials, in particular to the test of the external quantum efficiency of solar cells or the photoelectric conversion efficiency of incident monochromatic light, and is a universal AC measurement method for the external quantum efficiency of solar cells. Background technique

[0002] Energy is the material basis for the existence and development of human society. With the continuous development of human society, especially after World War II, the world economy has entered a new period of development, and the demand for energy is also increasing day by day. Mineral energy such as coal, oil, and natural gas is consumed in large quantities. Human beings are facing increasingly severe energy crises and environmental crisis. Developing countries face particular problems because of differences in the composition of energy consumption. Taking China as an example, statistics in 2...

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Embodiment Construction

[0033] Such as figure 1 , the inventive method comprises the following steps:

[0034] 1), prepare the measurement device, including xenon lamp light source 1, focusing lens 2, monochromator 5, optical chopper 3, lock-in amplifier 9, monochromatic optical power meter, microcomputer 10 and sample holder 8, focusing lens 2 adopts Quartz plano-convex lens, the sample holder 8 is used to fix the solar cell 7, the sample holder 8 has a built-in electronic temperature control device and a sampling resistor, and the sampling resistor is short-circuited at the positive and negative ends of the solar cell;

[0035] 2), utilize the characteristic spectral line of mercury lamp spectrum to calibrate monochromator 5, monochromator 5 incident slit places are provided with multi-block filter 4, form a filter wheel, be used for eliminating the influence of secondary spectrum, The optical filter 4 is controlled by the operation software of the monochromator 5 itself;

[0036] 3) Adjust the x...