Abstract: An electron emitter comprises a tapered-shaped emission tip having a base face and an apex opposite the base face, the emission tip consisting essentially of semiconductor material, the semiconductor material being partially doped n-type and partially doped p-type, wherein the base face is doped one of n-type or p-type and the apex is doped opposite type of the base face and a p-n junction is thereby formed at a position between the base face and the apex.

Abstract: A method of making a virtual substrate includes providing a donor substrate comprising a single crystal donor layer of a first material over a support substrate, wherein the first material comprises a ternary, quaternary or penternary semiconductor material or a material which is not available in bulk form, bonding the donor substrate to a handle substrate, and separating the donor substrate from the handle substrate such that a single crystal film of the first material remains bonded to the handle substrate.

Abstract: A multi-junction solar cell includes an active silicon subcell, a first non-silicon subcell bonded to a first side of the active silicon subcell, and a second non-silicon subcell bonded to a second side of the active silicon subcell. This and other solar cells may be formed by bonding and layer transfer.

Abstract: The invention concerns a photoactive nanocomposite (3) comprising at least one donor-acceptor couple of semiconductor elements. One of the elements is made of doped nanowires (7) with sp3 structure, and the other of the elements is an organic compound (8). The elements are supported by a device substrate (1). The invention also concerns a production method. According to a first embodiment, after their growth, the nanowires (7) are retrieved, functionalised and solubilised in the organic component (8). The mixture is deposited by coating on a device substrate. According to a second embodiment, the nanowires (7) are formed on a growth substrate (5) which is also the device substrate. The organic component (8) is combined with the nanowires (7) so as to form an active layer (3). Such a photoactive nanocomposite (3) allows production of a photovoltaic cell.

Abstract: A method of making an electrode, such as an interconnect for a semiconductor device, includes forming aligned carbon nanotubes using dielectrophoresis.

Abstract: A method of making a semiconductor thin film bonded to a handle substrate includes implanting a semiconductor substrate with a light ion species while cooling the semiconductor substrate, bonding the implanted semiconductor substrate to the handle substrate to form a bonded structure, and annealing the bonded structure, such that the semiconductor thin film is transferred from the semiconductor substrate to the handle substrate.

Abstract: The invention concerns a photoactive nanocomposite (3) comprising at least one donor-acceptor couple of semiconductor elements. One of the elements is made of doped nanowires (7) with sp3 structure, and the other of the elements is an organic compound (8). The elements are supported by a device substrate (1). The invention also concerns a production method. According to a first embodiment, after their growth, the nanowires (7) are retrieved, functionalised and solubilised in the organic component (8). The mixture is deposited by coating on a device substrate. According to a second embodiment, the nanowires (7) are formed on a growth substrate (5) which is also the device substrate. The organic component (8) is combined with the nanowires (7) so as to form an active layer (3). Such a photoactive nanocomposite (3) allows production of a photovoltaic cell.

Abstract: A method of forming a virtual substrate comprised of an optoelectronic device substrate and handle substrate comprises the steps of initiating bonding of the device substrate to the handle substrate, improving or increasing the mechanical strength of the device and handle substrates, and thinning the device substrate to leave a single-crystal film on the virtual substrate such as by exfoliation of a device film from the device substrate. The handle substrate is typically Si or other inexpensive common substrate material, while the optoelectronic device substrate is formed of more expensive and specialized electro-optic material. Using the methodology of the invention a wide variety of thin film electro-optic materials of high quality can be bonded to inexpensive substrates which serve as the mechanical support for an optoelectronic device layer fabricated in the thin film electro-optic material.

Abstract: A multi-junction solar cell includes a silicon solar subcell, a GaInP solar subcell, and a GaAs solar subcell located between the silicon solar subcell and the GaInP solar subcell. The GaAs solar subcell is bonded to the silicon solar subcell such that a bonded interface exists between these subcells.

Abstract: A method of forming a virtual substrate comprised of an optoelectronic device substrate and handle substrate comprises the steps of initiating bonding of the device substrate to the handle substrate, improving or increasing the mechanical strength of the device and handle substrates, and thinning the device substrate to leave a single-crystal film on the virtual substrate such as by exfoliation of a device film from the device substrate. The handle substrate is typically Si or other inexpensive common substrate material, while the optoelectronic device substrate is formed of more expensive and specialized electro-optic material. Using the methodology of the invention a wide variety of thin film electro-optic materials of high quality can be bonded to inexpensive substrates which serve as the mechanical support for an optoelectronic device layer fabricated in the thin film electro-optic material.