Abstract: Disclosed herein are organic photosensitive optoelectronic devices, such as organic photovoltaics, including a photoactive region, wherein the photoactive region contains an energy-cascading multilayer donor region. The energy-cascading multilayer donor region may drive exciton transfer from an anode to a dissociating interface while reducing exciton quenching, improving overlap with the solar spectrum, and minimizing polaron pair recombination, resulting in improved device performance.

Abstract: A method of making a photovoltaic cell comprises the steps of providing a substrate in a vacuum, depositing an anode over the substrate, depositing a first heterojunction layer over the anode layer, depositing a second heterojunction layer over the first heterojunction layer, depositing a cathode over the second heterojunction layer, and releasing the vacuum. A photovoltaic cell is also described.

Abstract: Thin-film electronic devices such as LED devices and field effect transistor devices are fabricated using a non-destructive epitaxial lift-off technique that allows indefinite reuse of a growth substrate. The method includes providing an epitaxial protective layer on the growth substrate and a sacrificial release layer between the protective layer and an active device layer. After the device layer is released from the growth substrate, the protective layer is selectively etched to provide a newly exposed surface suitable for epitaxial growth of another device layer. The entire thickness of the growth substrate is preserved, enabling continued reuse. Inorganic thin-film device layers can be transferred to a flexible secondary substrate, enabling formation of curved inorganic optoelectronic devices.

Abstract: A solar tracking system for tracking the orientation of solar energy is disclosed. The solar tracking system may be integrated with solar cells and solar concentrators. The solar tracking system may have a first (22) and second (24) tracker module array that are opposite from another, aligned in substantially identical orientation, and form a tracker module pair array (1000). Tracker module pairs (12, 14; 12, 144) may allow motion relative to one another while maintaining substantially identical orientation. Solar concentrators may be attached to opposing tracker modules of a tracker module pair forming an array of solar concentrators. A base bar array (28) may be coupled to at least one tracker module pair. A transmission may operably rotate the base bar array and the tracker module pair array simultaneously.

Abstract: A first device is provided. The device includes a print head. The print head further includes a first nozzle hermetically sealed to a first source of gas. The first nozzle has an aperture having a smallest dimension of 0.5 to 500 microns in a direction perpendicular to a flow direction of the first nozzle. At a distance from the aperture into the first nozzle that is 5 times the smallest dimension of the aperture of the first nozzle, the smallest dimension perpendicular to the flow direction is at least twice the smallest dimension of the aperture of the first nozzle.

Abstract: Organic photovoltaic cells (OPVs) and their compositions are described herein. In one or more embodiments, the OPV or solar cell includes an anode; a cathode; a first active layer positioned between the anode and the cathode, the first active layer configured to absorb light in a first wavelength spectrum; a second active layer positioned between the anode and the cathode, the second active layer configured to absorb light in a second wavelength spectrum; and a recombination zone positioned between the first active layer and the second active layer.

Abstract: An organic light emitting device (OLED) comprises an anode; a cathode; and a light emitting layer, disposed between the anode and the cathode; wherein the light emitting layer comprises at least one luminescent compound; and wherein the transition dipole moment of the at least one luminescent compound is oriented parallel to the surface of the light emitting layer. A method of fabricating a light emitting layer, comprises the steps of providing a substrate; depositing less than 2 nm of a template material on the substrate; and depositing a composition comprising at least one light emitting compound on the template material.

Abstract: An organic optoelectronic device comprises a substrate having first and second regions, a first electrode positioned over the first region of the substrate, a shutter electrode positioned over the second region of the substrate, an organic heterojunction layer comprising an organic heterojunction material, positioned over at least a portion of the first electrode, an insulator layer positioned over at least a portion of the shutter electrode, an organic channel layer, comprising an organic channel material, positioned over at least a portion of the heterojunction and insulator layers, and a second electrode positioned over the channel layer in the second region of the substrate, wherein the shutter electrode is configured to generate a repulsive potential barrier in the channel layer, suitable to at least reduce movement of charge in the channel layer. A method of measuring received light in an optoelectronic device is also described.

Abstract: An organic photovoltaic device comprises an anode and a cathode, an active layer positioned between the anode and the cathode, comprising a first donor material and a first acceptor material in a first ratio, and an interface layer positioned between the anode and the cathode, comprising a second donor material and a second acceptor material in a second ratio. A method of fabricating an organic photovoltaic device and an organic photovoltaic device produced with the disclosed methods are also disclosed herein.

Abstract: Semitransparent organic photovoltaic (OPV) cells provide integrated photovoltaic needs, such as use on windows and other architectural surfaces. These cells can achieve high power conversion efficiency and supply acceptable transparency. Inverted, semitransparent OPV cells are provided that include a mixed organic heterojunction layer or a planar-mixed heterojunction layer. These cells can additionally be used to create a tandem cell, which absorbs light over a broader range of wavelengths.

Abstract: An organic optoelectronic device comprises a first electrode, a first infrared photovoltaic subcell positioned over the first electrode, a second infrared photovoltaic subcell positioned over the first near-infrared subcell, and a first visible photovoltaic subcell positioned over the second near-infrared subcell, a second electrode positioned between the second near-infrared photovoltaic subcell and the first visible photovoltaic subcell, and a third electrode positioned over the first visible photovoltaic subcell, wherein the first electrode and the third electrode are held at the same potential relative to the second electrode.

Abstract: An OLED device comprises a substrate, a first electrode positioned over the substrate, a second electrode positioned over the first electrode, at least one emissive layer positioned between the first and second electrodes in a first region of the OLED device, and a multilayer dielectric reflector stack, comprising a plurality of dielectric reflector layers positioned between the substrate and the first electrode, wherein the multilayer dielectric reflector stack is configured to form an optical cavity with the emissive layer having a Purcell Factor of at least 3.

Abstract: Provided herein is an organic photovoltaic device comprising one or ore layers comprising one or more organic and/or organometallic compounds, and one or more of these layers may have a root-mean-square surface roughness ranging from about 2 nm to about 10 nm. Additionally provided is a method of manufacturing an organic photovoltaic device, and may comprise depositing one or more organic and/or organometallic compounds in one or more layers having a root-mean-square surface roughness ranging from about 2 nm to about 10 nm. Also provided is an organic photovoltaic device comprises one or more layers of one or more organic and/or organometallic compounds, the layers are deposited by organic vapor phase deposition, and the PCE may decrease by no more than about 1% after 250 hours of illumination at 1 sun intensity.

Abstract: Disclosed herein are organic photosensitive optoelectronic device comprising a first layer comprising one or more of a first layer material, a second layer comprising one or more of a second layer material, and a third layer comprising one or more of a third layer material. The second layer may be dissolved in a semi-orthogonal solvent. The first layer and the third layer may be very slightly soluble or practically insoluble in the semi-orthogonal solvent.

Abstract: A method of fabricating a photovoltaic cell having a microinverter is provided. The method may include fabricating a monolithic microinverter layer through epitaxy and operably connecting the at least one microinverter layer to at least one photovoltaic cell formed on a photovoltaic layer. A photovoltaic device is also provided. The device may have a photovoltaic layer comprising at least one photovoltaic cell and a microinverter layer comprising at least one microinverter, wherein the microinverter layer was fabricated through epitaxy, the at least one microinverter is configured to be operably connected to at least one photovoltaic cell.

Abstract: Organic photovoltaic cells (OPVs) and their compositions are described herein. In one or more embodiments, the acceptor with an active layer of an OPV includes is a non-fullerene acceptor. Such non-fullerene acceptors may provide improved OPV performance characteristics such as improved power conversion efficiency, open circuit voltage, fill factor, short circuit current, and/or external quantum efficiency. One example of a non-fullerene acceptor is (4,4,10,10-tetrakis(4-hexylphenyl)-5,11-(2-ethylhexyloxy)-4,10-dihydro-dithienyl[1,2-b:4,5b?] benzodi-thiophene-2,8-diyl) bis(2-(3-oxo-2,3-dihydroinden-5,6-dichloro-1-ylidene) malononitrile.

Abstract: There is disclosed squaraine compounds of formula I: wherein each of Y1 and Y2 is independently chosen from an optionally substituted amino group and an optionally substituted aryl group. Also described are organic optoelectronic devices comprising a Donor-Acceptor heterojunction that is formed from one or more of the squaraine compounds. A method of making the disclosed device, which may include one or more sublimation step for depositing said squaraine compound, is also disclosed.

Abstract: An organic vapor deposition device comprises a print head, comprising a source channel, in fluid communication with a flow of carrier gas and a quantity of organic source material configured to mix with the carrier gas, a nozzle having a deposition outlet, in fluid communication with the source channel, and a shutter configured at least to open and close the deposition outlet, wherein the print heat is configured to allow the flow of carrier gas and the organic source material exit the deposition outlet when the shutter is in an open position, and to prevent the flow of carrier gas and the organic source material from exiting the deposition outlet when the shutter is in a closed position. A method of manufacturing a device comprising an organic feature on a substrate is also described.

Abstract: An organic photovoltaic cell comprises a first electrode, a second electrode, an active layer comprising at least one donor material and at least one acceptor material, positioned between the first electrode and the second electrode, an outcoupling layer positioned on a surface of the first electrode such that the first electrode is positioned between the outcoupling layer and the active layer, and an anti-reflective coating positioned over a surface of the second electrode such that the second electrode is positioned between the anti-reflective coating and the active layer, wherein the organic photovoltaic cell is at least semi-transparent to at least one wavelength range. A method of fabricating an organic device is also described.

Abstract: A method of fabricating a photovoltaic cell having a microinverter is provided. The method may include fabricating a monolithic microinverter layer through epitaxy and operably connecting the at least one microinverter layer to at least one photovoltaic cell formed on a photovoltaic layer. A photovoltaic device is also provided. The device may have a photovoltaic layer comprising at least one photovoltaic cell and a microinverter layer comprising at least one microinverter, wherein the microinverter layer was fabricated through epitaxy, the at least one microinverter is configured to be operably connected to at least one photovoltaic cell.