Micro-area multispectral response photoelectric tester for multi-junction solar cell

Abstract

The invention discloses a micro-area photoelectric tester for a multi-junction solar cell. The micro-area photoelectric tester comprises a tunable laser module, a laser processing module, an optical chopper, a bias white light module, a filter group, a double-optical-path optical microscope, a scanning module, a microscopic electrical fixture, a power supply, an electrical test unit and a standard cell. The tunable laser module and the laser processing module provide signal light for a multi-junction cell micro-area test, the signal light is modulated through a beam chopping module, the bias white light module and the filter group provide bias light, and the signal laser and the bias light are focused on a solar cell through the dual-optical-path optical microscope, The testing process is monitored through synchronous real-time imaging of a camera, and a microscopic electrical clamp is connected with a power supply and an electrical testing unit to provide testing of bias voltage and electrical signals. The instrument is characterized in that other shielding systems are not needed, real-time synchronous monitoring can be achieved, and submicron spatial resolution and multispectral response multi-junction solar cell micro-area photoelectric conversion characteristic testing is achieved in a high-precision, rapid and nondestructive mode.

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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