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
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[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...
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