Alexi C Arango

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Since the mixing ratio of the anions in the solution from which the crystals were grown was revealed to be almost identical to the stoichiometry determined by EPMA of the obtained crystal, the mixing ratio of the anions in the solution was adopted in the chemical formula of the crystal. The results of EPMA of k-(BETS) 2 Fe x Ga 1±x Br 1.0 Cl 3.0 are: for x(More)
We demonstrate a bilayer photovoltaic device consisting of a heterojunction between colloidal cadmium selenide (CdSe) quantum dots (QDs) and a wide band gap organic hole-transporting thin film of N,N'-diphenyl-N,N'-bis(3-methylphenyl)[1,1'-biphenyl]-4,4'-diamine (TPD) molecules. The active light-absorbing film of QDs is nondestructively printed onto TPD(More)
Solution-processable colloidal quantum-dot systems exhibit many of the special optical and electronic properties associated with epitaxially grown, quantum confined systems. Their tunable band gap and higher absorption relative to the bulk make quantum dots particularly attractive as photo-generation materials. At the same time, colloidal quantum dots offer(More)
Organic light-emitting diodes (OLEDs) and other optoelectronic applications employ molecular organic solids due to their high luminance, efficiency, and contrast ratio [1], but the shadow-masking technology currently used to pattern pixels at the finest level of feature definition requires thin, delicate masks, which are difficult to scale to large-area(More)
Alternating current thin-film electroluminescent (AC-TFEL) devices already occupy a segment of the large-area, high-resolution, flat-panel-display market. The AC-TFEL displays, which consist of a phosphor layer, such as manganese doped-zinc sulfide (ZnS:Mn), vertically sandwiched between two insulators that are contacted by electrodes, are robust, possess(More)
BACKGROUND The first cases of multiple sclerosis (MS) in Panama were notified in the 1980s and it was considered a low-risk region for this disease. Between 2000 and 2005, a prevalence study was conducted to characterize MS in Panama. METHODS An instrument was developed to gather information from clinical files and interviews with previous informed(More)
Our research is focused on deciphering the physical properties that govern behavior of nanostructured materials and applying the findings to development of practical, active technologies. With focus on organic and inorganic-nanocrystal electronic and optoelectronic structures, to date we demonstrated efficient LEDs, lasers, solar cells, photodetectors,(More)
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