Abstract: A two-dimensional (2D) hybrid perovskite based opto-electric device includes first and second 2D perovskite layers extending along a given plane; an organic layer sandwiched between the first and second 2D perovskite layers, and extending along the given plane; an external organic layer formed on the first 2D perovskite layer and configured to directly face an ambient of the opto-electric device and to extend along the given plane; and electrical pads directly formed over the external organic layer. A roughness of the external organic layer is smaller than 10 nm.

Abstract: A self-powered and flexible photodetector system includes a triboelectric nanogenerator, TENG, device configured to generate an electrical current from a mechanical movement; a photodetector, PD, sensor, formed on the TENG device and configured to detect a light; and a voltage regulating circuit electrically connected to the TENG device and the PD sensor and configured to regulate a voltage provided by TENG device to the PD sensor. The PD sensor and the TENG device are flexible.

Abstract: A triboelectric photodetector system that includes a triboelectric device configured to generate an electrical current based on a mechanical movement, the triboelectric device having a first compounded layer and a second compounded layer partially separated by a gap; a photodetector, PD, sensor formed on the triboelectric device and configured to transform light energy into electrical energy with a perovskite layer; a first electrical connection that electrically connects a first electrode of the PD sensor to the first compounded layer of the triboelectric device; and a second electrical connection that electrically connects a second electrode of the PD sensor to the second compounded layer of the triboelectric device. The triboelectric device electrically biases the PD sensor to facilitate electrical carrier extraction from the perovskite layer of the PD sensor.

Abstract: A two-dimensional (2D) hybrid perovskite based opto-electric device includes first and second 2D perovskite layers extending along a given plane; an organic layer sandwiched between the first and second 2D perovskite layers, and extending along the given plane; an external organic layer formed on the first 2D perovskite layer and configured to directly face an ambient of the opto-electric device and to extend along the given plane; and electrical pads directly formed over the external organic layer. A roughness of the external organic layer is smaller than 10 nm.

Abstract: Roll-to-roll fabrication of predetermined or ordered three-dimensional nanostructure arrays is described. Provided methods can comprise imprinting a substrate with a two-dimensional (2-D) pattern by rolling a cylindrical pattern comprising a 2-D array of structures against a substrate. In addition, control or determination of nanostructure parameters via control of process parameters is provided.

Abstract: Roll-to-roll fabrication of predetermined or ordered three-dimensional nanostructure arrays is described. Provided methods can comprise imprinting a substrate with a two-dimensional (2-D) pattern by rolling a cylindrical pattern comprising a 2-D array of structures against a substrate. In addition, control or determination of nanostructure parameters via control of process parameters is provided.