Solar cell and its preparation method
A solar cell and electrode technology, applied in circuits, photovoltaic power generation, electrical components, etc., can solve the problems of power consumption, affecting the output performance of the device, and increasing its own temperature, increasing the equivalent parallel resistance value, reducing its own temperature, The effect of avoiding edge leakage
Active Publication Date: 2017-01-11
TIANJIN SANAN OPTOELECTRONICS
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Problems solved by technology
Specifically, in multi-junction concentrating solar cells, if the parallel resistance of a certain junction cell is not large enough, when the device works near the short-circuit current, the sub-cell is often in negative voltage bias, and the sub-cell in negative voltage bias The battery will act as a load to consume the power output by other sub-batteries, and at the same time cause its own temperature to rise, which will eventually affect the output performance of the device
Method used
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[0052]Hereinafter, the structure of the flip-chip multi-junction solar cell to which the present invention is applied and its manufacturing method will be described with reference to the drawings. In the drawings used in the following description, for the sake of easy understanding of features, characteristic parts may be enlarged for convenience, and the dimensional ratios and the like of each component may not necessarily be the same as the actual ones. In addition, the material, dimension, etc. which were illustrated in the following description are an example, and this invention is not limited to these, In the range which does not change the summary, it can change suitably and implement.
[0053] [Flip chip multi-junction solar cell]
[0054] figure 2 It is a schematic cross-sectional view showing an example of the flip-chip multi-junction solar cell of the present invention.
[0055] The flip-chip multi-junction solar cell of this embodiment includes a support substrat...
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The invention provides a solar battery and a manufacturing method thereof. The solar battery comprises a substrate, a solar battery semiconductor layer arranged on the substrate, and an ohmic electrode arranged on the upper surface of the solar battery semiconductor layer, wherein the ohmic electrode comprises a main grid part and branch parts. The solar battery is characterized in that the solar battery semiconductor layer is divided into a function region and a non function region; the function region is only formed in a region which is not overlapped with the main grid part in an overlooking state. In some embodiments, a current blocking layer is arranged in a region of the solar battery semiconductor layer, overlapped with the main grid part in an overlooking state and used for blocking photoproduced current from diffusing to the solar battery semiconductor layer below the main grid part so as to effectively reduce the equivalent parallel resistance of the solar battery.
Description
technical field [0001] The invention belongs to the field of semiconductor solar cells, and relates to a concentrating solar cell chip and a preparation method thereof. Background technique [0002] The third-generation concentrated solar cells have attracted much attention because of their high photoelectric conversion efficiency. Generally speaking, the equivalent parallel resistance inside a solar cell is an important factor affecting its photoelectric conversion efficiency. The larger the equivalent parallel resistance, the higher the fill factor and output efficiency, and the better the battery output characteristics; otherwise, the battery performance will be lower. affected. Specifically, in multi-junction concentrating solar cells, if the parallel resistance of a certain junction cell is not large enough, when the device works near the short-circuit current, the sub-cell is often in negative voltage bias, and the sub-cell in negative voltage bias The battery will a...
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IPC IPC(8): H01L31/0352H01L31/0224H01L31/18
CPCH01L31/022425H01L31/022433H01L31/0352H01L31/18Y02E10/50Y02P70/50
Inventor 杨美佳林桂江毕京锋刘冠洲李明阳熊伟平陈文浚吴超瑜王笃祥
Owner TIANJIN SANAN OPTOELECTRONICS