Manufacturing method of GaInP/GaAs/InGaAsP/InGaAs four-junction solar battery
A technology of solar cells and manufacturing methods, applied in the field of solar photovoltaics, can solve problems such as increasing battery manufacturing costs, increasing battery efficiency factors, and increasing battery process difficulties, so as to improve photoelectric conversion efficiency, eliminate factors affecting device performance, and reduce The effect of small heat loss
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[0019] In order to make the above objectives, features and advantages of the present invention more obvious and easy to understand, the following is specifically described in detail in conjunction with specific embodiments of the present invention as follows:
[0020] 1) Cell growth before bonding
[0021] As shown in FIG. 1, it is a schematic diagram of the battery structure before and after the bonding of the GaInP / GaAs / solar cell and the InGaAsP / InGaAs solar cell used in the present invention. It can be clearly seen from the figure that the double-junction battery first grows GaAs battery on GaAs substrate, and then grows lattice-matched GaInP battery; grows lattice-matched InGaAs battery on InP substrate, and then grows lattice Matched InGaAsP battery. Because they are all grown by lattice matching, it will not increase the difficulty of material growth due to lattice mismatch, and will not cause dislocations due to the stress release of the epitaxial layer, which will affect ...
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