Abstract: Embodiments of the disclosed subject matter provide an organic vapor jet printing (OVJP) system having a printhead that include a fluidic shutter comprising a plurality of microchannels that are in fluidic communication with one another, and a micronozzle array connected to the fluidic shutter. The plurality of microchannels include a first microchannel to receive the carrier-organic mixture, a second microchannel to receive a blocking gas, a third microchannel connected to the micronozzle array, and a fourth microchannel connected to an exhaust line. The carrier-organic mixture may be deposited on a substrate when the apparatus operates in a first operating mode, and the blocking gas may direct evaporated organic material of the carrier-organic mix to the exhaust line when the apparatus operates in a second operating mode.

Abstract: An organic light emitting device comprises an anode, a first hole transport layer positioned over the anode, a barrier transport layer positioned over the first hole transport layer, a second hole transport layer positioned over the barrier transport layer, at least one emissive layer positioned over the second hole transport layer, and a cathode positioned over the at least one emissive layer.

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 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.