Abstract:
A compound having a surface region of highly negative electrostatic potential, which comprises a ligand L A represented by Formula I may be used in organic electroluminescent devices (OLEDs) and consumer products. Transition metal complexes comprising the ligand L A of Formula I may promote molecular alignment of dopants in OLEDs.
Abstract:
A compound having a surface region of highly negative electrostatic potential, which comprises a ligand L A represented by Formula I may be used in organic electroluminescent devices (OLEDs) and consumer products. Transition metal complexes comprising the ligand L A of Formula I may promote molecular alignment of dopants in OLEDs.
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:
Disclosed herein are stable organic photosensitive devices including at least one exciton-blocking charge carrier filter. The filters comprise a mixture of at least one wide energy gap material having a sufficiently high glass transition temperature, e.g., higher than the temperature or temperature range at which the device typically operates, higher than a highest operating temperature of the device, higher than a threshold temperature value, etc. and at least one electron or hole conducting material. As described herein, the novel filters simultaneously block excitons and conduct the desired charge carrier (electrons or holes).
Abstract:
An organic light emitting device is disclosed whose emissive layer has a host material, a first emissive dopant, and a second dopant. The second dopant is an excited energy state managing dopant provided in an amount between 2-10 vol. % of the emissive layer and has a lowest triplet state energy level, T M , that is higher than a lowest triplet state energy levels, T 1 , of both the host and the first dopant and lower than the multiply-excited energy level, T *, of the first dopant.
Abstract:
There is disclosed ultrahigh-efficiency single- and multi-junction thin-film solar cells. This disclosure is also directed to a substrate-damage-free epitaxial lift-off (ELO) process that employs adhesive-free, reliable and lightweight cold-weld bonding to a substrate, such as bonding to plastic or metal foils shaped into compound parabolic metal foil concentrators. By combining low-cost solar cell production and ultrahigh-efficiency of solar intensity-concentrated thin-film solar cells on foil substrates shaped into an integrated collector, as described herein, both lower cost of the module as well as significant cost reductions in the infrastructure is achieved.
Abstract:
A method of preparing a bulk heterojunction organic photovoltaic cell through combinations of thermal and solvent vapor annealing are described. Bulk heterojunction films may prepared by known methods such as spin coating, and then exposed to one or more vaporized solvents and thermally annealed in an effort to enhance the crystalline nature of the photoactive materials.
Abstract:
A photosensitive optoelectronic device having an improved hybrid planar bulk heterojunction includes a plurality of photoconductive materials (950) disposed between the anode (120) and the cathode (170). The photoconductive materials (950) include a first continuous layer of donor material (152) and a second continuous layer of acceptor material (154). A first network of donor material or materials (953c) extends from the first continuous layer (152) toward the second continuous layer (154), providing continuous pathways for conduction of holes to the first continuous layer (152). A second network of acceptor material or materials (953b) extends from the second continuous layer (154) toward the first continuous layer (152), providing continuous pathways for conduction of electrons to the second continuous layer (154). The first network (953c) and the second network (953b) are interlaced with each other. At least one other photoconductive material (953a, 953d) is interspersed between the interlaced networks. This other photoconductive material or materials (953a, 953d) has an absorption spectra different from the donor and acceptor materials.
Abstract:
An organic photosensitive optoelectronic device, having a donor-acceptor heterojunction of a donor-like material and an acceptor-like material and methods of making such devices is provided. At least one of the donor-like material and the acceptor-like material includes a subphthalocyanine, a subporphyrin, and/or a subporphyrazine compound; and/or the device optionally has at least one of a blocking layer or a charge transport layer, where the blocking layer and/or the charge transport layer includes a subphthalocyanine, a subporphyrin, and/or a subporphyrazine compound.