| CPC H10K 30/10 (2023.02) [H10F 10/16 (2025.01); H10F 77/12 (2025.01); H10F 77/496 (2025.01)] | 13 Claims |

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1. An energy harvesting device, comprising
a patterned graphene sheet arranged on a substrate, wherein the patterned graphene sheet contains channels;
a perovskite composition arranged on the patterned graphene sheet, wherein the perovskite composition conforms to the channels of the patterned graphene sheet;
a luminescent material composition or a 2D material composition arranged on the perovskite composition; and
at least two electrodes wherein the patterned graphene sheet is arranged between the perovskite composition and the at least two electrodes.
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