Machine Learning for Ultra High Throughput Screening of Organic Solar Cells: Solving the Needle in the Haystack Problem

Over the last two decades the organic solar cell community has synthesized tens of thousands of novel polymers and small molecules in the search for an optimum light harvesting material. These materials are often crudely evaluated simply by measuring the current–voltage (JV) curves in the light to obtain power conversion efficiencies (PCEs). Materials with low PCEs are quickly disregarded in the search for higher efficiencies. More complex measurements such as frequency/time domain characterization that could explain why the material performed as it is often not performed as they are too time consuming/complex. This limited feedback forced the field to advance using a more or less random walk of material development and has significantly slowed progress. Herein, a simple technique based on machine learning that can quickly and accurately extract recombination time constants and charge carrier mobilities as a function of light intensity simply from light/dark JV curves alone. This technique reduces the time to fully analyze a working cell from weeks to seconds and opens up the possibility of not only fully characterizing new devices as they are fabricated, but also data mining historical data sets for promising materials the community has overlooked

Turnen ist mehr ! Zur wiederbegründung und weiterentwicklung des turnens seit 1945 aus verbandspolitischer sicht

Politique de promotion de la culture physique par la gymnastique, menée par la fédération allemande de gymnastique (DTB) depuis sa refondation après la Seconde Guerre mondiale, jusqu'à nos jours

New paper chromatographic procedures for fractionating the lipides

93 p. ill.Printing process for illustrations in original document: Ozalid proces

Unidentified factors in the nutrition of chickens

Due to the character of the original source materials and the nature of batch digitization, quality control issues may be present in this document. Please report any quality issues you encounter to [email protected], referencing the URI of the item.Bibliography: p. 40-46.Not availabl

The calcium reserve/basement membrane complex of the avian eggshell : implications for development of calcium translocation and respiratory functions

Vita.A well-defined subregion of the mammillary knob of the avian eggshell, designated the calcium reserve assembly (CRA), is identified as a specialized structure housing the calcium reserve for the embryo. Embedded in the fibers of the outer shell membrane, the CRA consists of a baseplate (a composite of modified shell membrane fibers and crystalline accretions) subtending the globose Ca-reserve body (CRB) (a calcified, proteinaceous gel component), and thin CRB-cover. The ontogeny of the CRA is here documented, from initial secretions in the granular isthmus to final capping by a newly-identified structure--the crown-in the uterus. Many eggshell anomalies may be explained as failures in the normal assembling of the components of the CRA, crown, and palisade layer. An empty zone is created beneath the shell by hatch-time, due to the embryo's drawdown of calcium from the CRA. Estimates of calcium recovery from CRA and shell (excluding air space) indicate that the CRA sequester sufficient calcium to supply the embryo's requirement. We have identified a classic basement membrane lining the inner shell membrane (ISM) and verified one of its defining constituents--laminin-by immunocytochemistry. Since, typically, basement membranes are associated with the molecular governance of cytodifferentiation, we propose that the cytodifferentiation of the chorioallantoic membrane (CAM) may be similarly programmed by requisite molecular interactions with the ISM-basement membrane. After adherence between the CAM and ISM-basement membrane (at about day-10 of incubation), an extensive intraectodermal blood sinus develops from capillaries originating in the mesenchyme. External squamous chorionic epithelial cells become transformed into capillary-covering cells having cytoplasmic processes which form a sheath over the blood sinus. The expanded blood sinus cavity is traversed by columns consisting of capillary-covering cell bodies, villus-cavity cells, and basal cells contributed from the inner ectodermal layer. The extensive blood sinus and related structures of the CAM enable proper respiration and calcium retrieval functions to develop. In essence, the two "hemiorgans" (CAM and ISM-basement membrane-CRA complex) become coupled around day-10 of incubation to form a functioning calcium retrieval-respiratory organ