Abstract: Photovoltaic devices having photoactive layers coupled to buffer layers are disclosed. Such devices may be transparent to visible light but absorb near-infrared light and/or ultraviolet light. The photovoltaic devices may include a p-phenylene layer that acts as a buffer layer. The photovoltaic devices may include one or more photoactive layers. The one or more photoactive layers may include a single planar heterojunction, a single bulk heterojunction (BHJ), or multiple stacked BHJs that have complementary absorption characteristics, among other possibilities.

Abstract: Photoactive compounds are disclosed. The disclosed photoactive compounds include metal complexes with dipyrromethene-based ligands, which can be substituted with a variety of different side chains or groups or can include various fused ring configurations, such as including aromatic or heteroaromatic groups. The metal complexes may include two dipyrromethene-based ligands, which can be the same or different. The photoactive compounds can be used as photoactive materials in organic photovoltaic devices, such as visibly transparent or opaque photovoltaic devices.

Abstract: An insulated glass unit (IGU) characterized by a transmitted IGU color (a*IGU; b*IGU) includes a photovoltaic structure characterized by a first transmitted color (a*1; b*1) and a low emissivity structure characterized by a second transmitted color (a*2; b*2). The first transmitted color and the second transmitted color are complementary.

Abstract: Identifying on-line advertising conversions includes identifying, at a computer server system, a plurality of reports from one or more computing devices, wherein each of the reports indicates a clock skew between one of the computing devices and a clock server system; using the clock skews to determine that two or more of the reports are likely from a common computing device; determining that the two or more of the reports are common, in that they correspond to display of an advertisement on the common computing device and to purchase of on-line content with the common computing device; and indicating that a purchase conversion occurred based on determining that the two or more of the reports are common.

Abstract: Identifying on-line advertising conversions includes identifying, at a computer server system, a plurality of reports from one or more computing devices, wherein each of the reports indicates a clock skew between one of the computing devices and a clock server system; using the clock skews to determine that two or more of the reports are likely from a common computing device; determining that the two or more of the reports are common, in that they correspond to display of an advertisement on the common computing device and to purchase of on-line content with the common computing device; and indicating that a purchase conversion occurred based on determining that the two or more of the reports are common.