Online detection device and method for thin film solar cell photovoltaic conversion layer

Abstract

The invention relates to an online detection device and an online detection method for detecting the uniformity of a thin film solar cell photovoltaic conversion layer, belongs to the technical field of a solar cell and solves the technical problem that before a back contact is made, the quality of the solar cell photovoltaic conversion film layer can be detected. The online detection device comprises a delivery mechanism and a testing platform; the testing platform is provided with a fixed frame with a test probe and a movable frame with a test probe; the test probe on the fixed frame is connected with a front electrode of the solar cell to form an anode of a testing device; the test probe on the movable frame is pressed on the solar cell photovoltaic conversion layer to form a cathode of the testing device; and a forward bias is added on the photovoltaic conversion layer to detect the film quality. The online detection device and the online detection method have the active effects that the testing device has a simple structure, is convenient and rapid to operate and low in cost; and before the back contact layer is made, the quality of the photovoltaic conversion film layer can be monitored.

Description

technical field [0001] The invention relates to an online detection device and method for detecting the uniformity of a photoelectric conversion layer of a thin-film solar cell, belonging to the technical field of solar cells. Background technique [0002] The quality of the photoelectric conversion layer of thin-film solar cells directly affects the conversion efficiency of solar cell modules, and the uniformity of the film layer is an important indicator of the quality of the film layer. Therefore, it is very important to monitor the uniformity of the film layer. At present, the photoelectric conversion film layer The quality detection method is to detect after the solar cell is manufactured. It mainly uses the principle of electroluminescence, and uses an infrared camera to shoot the infrared light emitted to judge the film quality of the thin-film solar cell. For example, Chinese patent 200780001718.0 discloses a A device and method for detecting defects in a laminated f...

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Problems solved by technology

[0002] The quality of the photoelectric conversion layer of thin-film solar cells directly affects the conversion efficiency of solar cell modules, and the uniformity of the film layer is an important indicator of the quality of the film layer. Therefore, it is very important to monitor the uniformity of the film layer. At present, the photoelectric conversion film layer The quality detection method is to detect after the solar cell is manufactured. It mainly uses the principle of electroluminescence, and uses an infrared camera to shoot the infrared light emitted to judge the film quality of the thin-film solar cell. For example, Chinese patent 200780001718.0 discloses a A device and method for detecting defects in a laminated film. A light source is arranged on one side of the film surface of a laminated battery, and an imaging device is arranged on the other side of the film surface to detect battery defects according to the captured image. However, the structure of this device is complex and the process The operation is cumbersome, and the method of local judgment based on the shadow of the photo after taking a photo cannot be quantified, and the human influence factor is large, which is not conducive to accurate detection and analysis of the quality of the film layer, and the above-mentioned device and method must be for the thin-film solar energy with the back electrode prepared. The battery is inspected, that is, the inspection process is carried out after preparing the back electrode layer, so that the back electrode layer is also deposited on the unqualified photoelectric conversion film layer, which not only wastes materials, but also increases production costs.

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