A Micro-area Multispectral Response Photoelectric Tester for Multijunction Solar Cells

Abstract

The invention discloses a micro-area photoelectric tester for multi-junction solar cells, which includes a tunable laser module, a laser processing module, an optical chopper, a biased white light module, a filter set, a dual optical path optical microscope, a scanning module, a display Micro-electrical fixtures, power supplies and electrical test units and standard batteries. The tunable laser and laser processing module provide signal light for multi-junction cell micro-area testing, the signal light is modulated by the beam chopper module, the bias white light module and filter set provide bias light, and the signal laser and The bias light is focused on the solar cell, and the test process is monitored by synchronous real-time imaging of the camera, and the microelectric fixture is connected with the power supply and the electrical test unit to provide the test of the bias voltage and electrical signal. The characteristic of this instrument is that it does not need other shielding systems, can monitor synchronously in real time, achieves high precision, fast and non-destructive sub-micron spatial resolution, and multi-spectral response micro-photoelectric conversion characteristics test of multi-junction solar cells.

Description

technical field [0001] The present invention relates to a Micro-area multi-spectral response photoelectric tester for multi-junction solar cells ,belong solar energy Battery micro-zone test technology field. Background technique [0002] With the comprehensive promotion of carbon neutrality in countries around the world, clean and renewable energy has attracted the attention and support of countries all over the world. Among them, the development of solar cell technology has been particularly rapid in recent years. The efficiency of traditional batteries has been continuously optimized, and emerging material batteries have been continuously proposed. The research scale of battery devices is also getting smaller and smaller. Since the efficiency limit of single-junction cells is only 33%, most of the incident light energy cannot be effectively utilized and will be converted into heat and other forms of energy. Therefore, the development of multi-junction cells has become...

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Problems solved by technology

[0007] (2) In the microscopic test, how to realize the simultaneous monitoring of the real-time position of the laser and the sample? If white light lighting is used, because white light lighting will bring additional bias current, even if the current amplifier plus phase-locking scheme is adopted later, the bias current will also cause these instruments to choose a large range, which will sacrifice the test accuracy or even make it impossible to test

[0008] (3) The photoresponse of micro-nano structures is usually wavelength-dependent, so the multi-spectral response micro-region testing methods of multi-junction cells also need to be developed

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