A manufacturing method of a composite photovoltaic structure, comprising steps of:
- a. forming a transparent electrode material, and providing a transparent substrate, wherein the transparent electrode material with a predetermined thickness is disposed on a top surface of the transparent substrate;
- b. forming a first photovoltaic unit, wherein materials of layers of the first photovoltaic unit are sequentially formed on the transparent electrode material, a top surface layer and a bottom surface layer of the first photovoltaic unit are respectively a transparent electron transport layer and a transparent hole transport layer, and a transparent activation layer is formed between the top surface layer and the bottom surface layer of the first photovoltaic unit;
- c. forming a first insulation layer, wherein the top surface layer of the first photovoltaic unit is etched to form at least one first insulation material channel which penetrates the transparent electrode material, and the first insulation material channel is filled with insulation material, such that the first insulation layer is formed in the first insulation material channel, and the first insulation layer separates the transparent electrode material into a first transparent electrode layer and a second transparent electrode layer, wherein the first transparent electrode layer is disposed under the first photovoltaic unit, and the second transparent electrode layer is disposed outside the first photovoltaic unit;
- d. forming a first transparent conductive layer, wherein a side of the first insulation layer is etched to form a first transparent conductive material channel which penetrates the transparent electrode material from the top surface layer of the first photovoltaic unit, and transparent conductive material is disposed on the top surface layer of the first photovoltaic unit and in the first transparent conductive material channel, such that the first transparent conductive layer is formed, wherein the first transparent conductive layer is disposed on the top surface layer of the first photovoltaic unit, extends along the side of the first insulation layer, and is electrically connected to the first transparent electrode layer;
- e. forming a second photovoltaic unit, wherein materials of layers of the second photovoltaic unit are sequentially formed on the first transparent conductive layer which is disposed on the first photovoltaic unit, a top surface layer and a bottom surface layer of the second photovoltaic unit are respectively a transparent electron transport layer and a transparent hole transport layer, and a transparent activation layer is disposed between the top surface layer and the bottom surface layer of the second photovoltaic unit;
- f. forming a second insulation layer, wherein the top surface layer of the second photovoltaic unit is etched to form at least one second insulation material channel which penetrates the transparent electrode material, and the second insulation material channel is filled with insulation material, such that the second insulation layer is formed in the second insulation material channel;
- g. forming a second transparent conductive layer, wherein a side of the second insulation layer is etched to form a second transparent conductive material channel which penetrates the transparent electrode material from the top surface layer of the second photovoltaic unit, and transparent conductive material is disposed on the top surface layer of the second photovoltaic unit and in the second transparent conductive material channel, such that the second transparent conductive layer is formed, wherein the second transparent conductive layer is disposed on the top surface layer of the second photovoltaic unit, extends along the side of the second insulation layer, and is electrically connected to the second transparent electrode layer;
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- h. splitting a product, wherein a top surface of the second transparent conductive layer is etched to form a cutting channel which penetrates the transparent electrode material, so as to separate the at least one of composite photovoltaic structures on the transparent substrate, wherein the composite photovoltaic structure has the first photovoltaic unit and the second photovoltaic unit stacked on the first photovoltaic unit, and both of them are disposed on the transparent substrate and electrically connected to each other in parallel.