Method for measuring dye sensitized solar battery conversion efficiency and mono-wavelength quantum efficiency

Abstract

The method for measuring the conversion efficiency of a dye-sensitized solar cell and the single-wavelength quantum efficiency comprises the following steps: determining the size of the light-receiving area of ​​the dye-sensitized nano-thin film solar cell, building a balanced bridge compensation circuit, and obtaining a current-voltage curve, which is obtained directly through a computer program Open-circuit voltage, short-circuit current, fill factor, conversion efficiency and other parameters; under the same monochromatic light conditions, measure the short-circuit current signals of the standard reference cell with known parameters and the experimental dye-sensitized nano-thin film solar cell, and compare the two Comparing calculations, the single-wavelength external quantum efficiency of the experimental dye-sensitized nano-thin film solar cell is obtained; an integrating sphere is placed at the spatial position before the dye-sensitized solar cell receives light for light integration, and the short-circuit current signal is measured, which is compared with the current of the standard reference cell The signals were compared and calculated to obtain the single-wavelength internal quantum efficiency of the experimental dye-sensitized nano-thin film solar cell.

Description

technical field [0001] The invention relates to the field of application of semiconductor materials and the field of optics, in particular to a method for testing the conversion efficiency and single-wavelength quantum efficiency of a dye-sensitized nano-film solar cell. Background technique [0002] With the development of human society and the massive consumption of fossil energy, mankind is facing an increasingly severe energy crisis. The solar cell power generation system is in a prominent position, and the wide application of the system requires high conversion efficiency of the solar cell and low manufacturing cost of the solar cell. In 1991, M. The professor's laboratory reported the research results of a brand-new dye-sensitized nano-thin film solar cell, which has received widespread attention and attention internationally. Its cheap production cost, easy industrial production technology, and broad application prospects have attracted the investment of many scien...

AI Technical Summary

Problems solved by technology

Although the traditional DC measurement method is simple, the measurement signal is too small and the test result is inaccurate

The advantage of the AC measurement method is that it does not require shielding and can suppress noise of various frequencies, but it is relatively complicated. It has certain problems in the process of measuring the parameters of dye-sensitized nano-thin film solar cells: due to the materials of this type of solar cells and The photoelectric conversion process mechanism is different from traditional silicon solar cells, and the cell's response to light is also different. Therefore, in the actual measurement process, the magnitude of the chopping frequency and the signal frequency coupling will cause the measurement results to shift.

All in all, the traditional single-wavelength quantum efficiency measurement method is either inaccurate or too complicated, so the measurement results cannot correctly reflect the characteristics of the dye-sensitized nano-thin film solar cell itself, which has caused inconvenience to the scientific research on the performance of solar cells

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