Thin film solar cell and method for manufacturing thin film solar cell
A technology of solar cells and thin films, applied in circuits, photovoltaic power generation, electrical components, etc., can solve problems such as not providing expressions
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no. 1 approach
[0076] figure 1 is a schematic plan view of an embodiment of the thin-film solar cell of the present invention. figure 2 (a) represents along figure 1 A schematic cross-sectional view taken of IIA-IIA, and figure 2 (b) represents along figure 1 Schematic cross-sectional view taken of IIB-IIB. exist figure 1 The thin film solar cell 1 of the present invention shown in has a transparent electrode layer 3, a semiconductor photoelectric conversion layer 4, and a back electrode layer 5 stacked on a transparent insulating substrate 2 in the following order, as in figure 2 shown in (a) and 2(b).
[0077] refer to figure 2 (b), the transparent electrode layer 3 is separated by the first separation trench 6 filled with the semiconductor photoelectric conversion layer 4 . The semiconductor photoelectric conversion layer 4 and the back electrode layer 5 are separated by the second separation trench 8 . Adjacent units are electrically connected in series through the contac...
no. 2 approach
[0111] Figure 11 is a schematic plan view of an embodiment of the thin-film solar cell of the present invention. Figure 12 (a) represents along Figure 11 XIIA-XIIA of the schematic cross-section taken by XIIA-XIIA, and Figure 12 (b) represents along Figure 11 Schematic cross-sectional view taken of XIIB-XIIB.
[0112] exist Figure 11 The feature of the thin-film solar cell 1 shown in is that the transparent electrode 3 not only protrudes in the length direction of the separation trench, extending beyond the semiconductor photoelectric conversion layer 4 and the back electrode layer 5, but also extends perpendicular to the length of the separation trench. One of the directions is highlighted.
[0113] The following will refer to Figure 13-20 The schematic cross-sectional view of is described in Figure 11 The fabrication method of thin-film solar cell 1 is shown in . exist Figure 13-20 Among them, (a) corresponds to the Figure 11 XIIA-XIIA (the length directi...
Embodiment 1
[0135] as in image 3 As shown in (a) and 3(b), a transparent insulating substrate 2 formed of a glass substrate was prepared, having a rectangular surface of 560 mm (width) × 925 mm (length), which was formed with SnO 2 Transparent conductive layer 3.
[0136] The fundamental wave YAG laser beam is scanned from the side of the transparent insulating substrate 2 in the length direction of the separation trench to remove the transparent conductive layer 3 in stripes. Thus, 50 first separation trenches 6 each having a width of 0.08 mm were formed, as in Figure 4 shown in (b). The first separation trenches 6 are formed such that the distances between adjacent first separation trenches 6 are equal (only in the power generation region). For the transparent insulating substrate 2, ultrasonic cleaning was performed with pure water. The first separation trench 6 is not formed in a direction perpendicular to the length direction of the separation trench, as in Figure 4 shown in ...
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