Universal AC measurement method for external quantum efficiency of solar battery

A solar cell and external quantum efficiency technology, which is applied in the measurement of electricity, measurement devices, and measurement of electrical variables, etc., can solve the problem that the accuracy of the measurement equipment cannot meet the demand, and achieve the effect of taking into account scalability, avoiding secondary errors, and efficient measurement.

Inactive Publication Date: 2010-05-19
NANJING UNIV
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Problems solved by technology

[0006] The problem to be solved by the present invention is: the accuracy of the measurement equipment of the existing solar cell quantum efficiency meas...

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  • Universal AC measurement method for external quantum efficiency of solar battery
  • Universal AC measurement method for external quantum efficiency of solar battery
  • Universal AC measurement method for external quantum efficiency of solar battery

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Embodiment Construction

[0033] Such as figure 1 , The method of the present invention includes the following steps:

[0034] 1) Prepare the measuring device, including the xenon lamp light source 1, the focusing lens 2, the monochromator 5, the optical chopper 3, the lock-in amplifier 9, the monochromatic optical power meter, the microcomputer 10 and the sample holder 8. The 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. The sampling resistor is short-circuited at the positive and negative ends of the solar cell;

[0035] 2) Calibrate the monochromator 5 by using the characteristic line of the mercury lamp spectrum. There are multiple filters 4 at the entrance slit of the monochromator 5 to form a filter wheel to eliminate the influence of the secondary spectrum. The conversion of the filter 4 is controlled by the operating software of the monochromator ...

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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 on preparation process and performing research on the mechanism of partly batteries.

Description

Technical field [0001] The invention relates to the application field and test field of semiconductor materials, in particular to the test of solar cell external quantum efficiency or incident monochromatic light photoelectric conversion efficiency, and is a universal AC measurement method of solar cell external quantum efficiency. 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 the Second World War, 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, and mankind is facing increasingly severe energy crisis and Environmental crisis. Due to the different composition of energy consumption, the problems facing developing countries are particularly serious. Take China as an example. Statistics in 2006 show that...

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Application Information

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IPC IPC(8): G01R31/36G01J1/42
Inventor 于涛薛国刚田志鹏田汉民邹志刚
Owner NANJING UNIV
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