Method for the production of a thin-film solar cell array, comprising a plurality of thin-film solar cells (I, II, III,...) applied on a substrate, which comprise respectively at least one first rear-side electrode (1 I, 1 II, 1 III,...), which is orientated towards the substrate, and a second electrode and/or a conversion layer (3 I, 3 II, 3 III,...) and also a photoactive layer (2 I, 2 II, 2 III,...) disposed between the rear-side electrode (1 I, 1 II, 1 III,...) and the second electrode and/or the conversion layer (3 I, 3 II, 3 III,...), the thin-film solar cell array a) having at least one overlapping region in which respectively one first (I, II,...) and one second thin-film solar cell (II, III,...) are disposed in two layers (n, n+1,...) and in pairs (I-II, II-III,...) situated one above the other, one region of the respectively first thin-film solar cell (I, II,...) in a first layer (n,...) and one region of the respectively second thin-film solar cell (II, III,...), which is disposed on the side of the respectively first thin-film solar cell (I, II,...) orientated away from the substrate in a layer (n+1,...) situated above the respectively first thin-film solar cell (I, II,...), being connected to each other and connected electrically in series, and b) having at least one transition region in which respectively only the respectively second thin-film solar cell (II, III,...) of the pair of respectively first and respectively second thin-film solar cell (I-II, II-III,...) is configured, configured in the layer (n+1,...) situated above the first layer, the rear-side electrode (1 II n+1, 1 III n+1,...), the photoactive layer (2 II n+1, 2 III n+1,...) and the second electrode and/or the conversion layer (3 II n+1, 3 III n+1,...) of the respectively second thin-film solar cell (II, III,...) being converted, configured in the first layer (n,...), into respectively one rear-side electrode (1 II n, 1 III n,...), a photoactive layer (2 II n, 2 III n,...) and a second electrode and/or a conversion layer (3 II n, 3 III n,...), in which there are produced on a substrate, simultaneously or successively, a plurality of thin-film solar cells (I, II, III,...) by means of respective simultaneous or successive deposition of at least one first rear-side electrode (1 I, 1 II, 1 III,...), which is orientated towards the substrate, and one photoactive layer (2 I, 2 II, 2 III,...) disposed above and also one second electrode and/or one conversion layer (3 I, 3 II, 3 III,...) disposed above on the substrate, at least two thin-film solar cells (I, II, III,...) being produced in at least one overlapping region in pairs (I-II, II-III,...) in at least two layers (n, n+1,...) situated one above the other, by the respectively second thin-film solar cell (II, III,...) of each pair (I-II, II-III,...) of first (I, II,...) and second thin-film solar cell (II, III,...) being deposited in regions in a layer (n+1, n+2,...) situated above the respectively first thin-film solar cell, and the respectively first (I, II,...) and second thin-film solar cell (II, III,...) in this region being connected electrically in series, and the respectively second thin-film solar cell (II, III,...) of each pair (I-II, II-III) of first (I, II,...) and second thin-film solar cell (II, III,...) being deposited offset relative to the respectively first thin-film solar cell (I, II,...) of each pair (I-II, II-III,...) of first (I, II,...) and second thin-film solar cell (II, III,...) so that a transition region is configured, in which the rear-side electrode (1 II, 1 III,...), the photoactive layer (2 II, 2 III,...) disposed above and also the second electrode and/or the conversion layer (3 II, 3 III,...) disposed above, of the respectively second thin-film solar cell of each pair (I-II, II-III,...) of first (I, II,...) and second thin-film solar cell (II, III,...) being converted from the layer (n+1, n+2,...) situated above the respectively first thin-film solar cell onto a layer (n, n+1) situated below. a) having at least one overlapping region in which respectively one first (I, II,...) and one second thin-film solar cell (II, III,...) are disposed in two layers (n, n+1,...) and in pairs (I-II, II-III,...) situated one above the other, one region of the respectively first thin-film solar cell (I, II,...) in a first layer (n,...) and one region of the respectively second thin-film solar cell (II, III,...), which is disposed on the side of the respectively first thin-film solar cell (I, II,...) orientated away from the substrate in a layer (n+1,...) situated above the respectively first thin-film solar cell (I, II,...), being connected to each other and connected electrically in series, and b) having at least one transition region in which respectively only the respectively second thin-film solar cell (II, III,...) of the pair of respectively first and respectively second thin-film solar cell (I-II, II-III,...) is configured, configured in the layer (n+1,...) situated above the first layer, the rear-side electrode (1 II n+1, 1 III n+1,...), the photoactive layer (2 II n+1, 2 III n+1,...) and the second electrode and/or the conversion layer (3 II n+1, 3 III n+1,...) of the respectively second thin-film solar cell (II, III,...) being converted, configured in the first layer (n,...), into respectively one rear-side electrode (1 II n, 1 III n,...), a photoactive layer (2 II n, 2 III n,...) and a second electrode and/or a conversion layer (3 II n, 3 III n,...),