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Solar battery IPCE curve measuring device and method

A technology of solar cells and measuring devices, applied in photovoltaic power generation, electrical components, photovoltaic system monitoring, etc., can solve problems affecting the accuracy and intuitiveness of results, relying on theoretical models, etc., to suppress errors, improve signal-to-noise ratio, The effect of increasing the degree of automation

Active Publication Date: 2010-07-07
INST OF PHYSICS - CHINESE ACAD OF SCI
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Problems solved by technology

The defect of this measurement method is that parameters such as equivalent resistance and equivalent capacitance need to be considered in the measurement, and the calculation formula of IPCE value is too dependent on the theoretical model, which affects the accuracy and intuitiveness of the obtained results
In addition, in the above IPCE curve measurement method, the reference battery and the battery under test are measured at different times, so there is a measurement error caused by the drift of the output light intensity of the light source

Method used

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  • Solar battery IPCE curve measuring device and method
  • Solar battery IPCE curve measuring device and method
  • Solar battery IPCE curve measuring device and method

Examples

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Embodiment 1

[0050] The solar cell IPCE measuring device of this embodiment includes a light source device, a short-circuit current measuring device and a computing device.

[0051] refer to image 3 , the light source device includes a light source 1, a monochromator 2, a lens group 3 and a 1:1 beam splitter 4; the light beam generated by the light source 1 becomes monochromatic light through the monochromator 2, and then corrected by the lens group 3 and coupled to 1:1 beam splitter 4, so as to obtain two identical beams at the same time and form two spots of the same size. In this embodiment, the light source 1 is a 500W xenon light source. Monochromator 2 is a single grating monochromator, the central wavelength of the grating blaze is 500nm, the wavelength scanning range covers 300nm-1100nm band, and the minimum step interval is 0.1nm. The lens group 3 is used for spot size adjustment and correction. The beam splitter 4 is a beam splitter with a light intensity of 1:1, which can be...

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Abstract

The invention provides a solar battery IPCE curve measuring device. The device comprises a light source device, a short circuit current measuring device and a calculation device, wherein the light source device is used to provide two beams of identical monochromatic light at the same time; the short circuit current measuring device is used to measure the short circuit photocurrent of a reference cell with a known response coefficient and a to-be-measured cell, and both cells are synchronously irradiated by the two beams of identical monochromatic light respectively and have identical illuminated areas; and the calculation device is used to calculate the IPCE values of the to-be-measured cells corresponding to monochromatic light of different wavelengths. The invention also provides a corresponding IPCE curve measuring method. The device and the method are capable of effectively inhibiting errors caused by output light intensity drift of a light source and accurate and intuitionistic and not influenced by battery capacitor characteristics and response speed and therefore are particularly suitable to measure the IPCE curve of a DSC battery. The embodiments of the invention can also increase the signal noise ratio of to-be-measured short circuit photocurrent signals.

Description

technical field [0001] The present invention relates to the application field and testing field of semiconductor materials, in particular, the present invention relates to a measuring device and a measuring method of a solar cell IPCE curve. Background technique [0002] Rational development and utilization of solar energy and development of solar cell industry are major issues for human beings to solve energy crisis and environmental pollution. The incident photon-electron conversion efficiency IPCE (incident photon-electron conversion efficiency) in solar cells is an important parameter to characterize the performance of the cell. Under a certain monochromatic light irradiation, IPCE is defined as the number of electrons output to the external circuit and the total incident photons. The ratio of numbers, its mathematical expression is: [0003] IPCE = 1240 × Jsc ( ...

Claims

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Application Information

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IPC IPC(8): G01R31/26H02S50/15
CPCY02E10/50
Inventor 孟庆波郭晓枝罗艳红李冬梅
Owner INST OF PHYSICS - CHINESE ACAD OF SCI
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