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Although these properties make them suitable for several applications, the number of reliable NIR luminescent lanthanide complexes available for OLED devices is negligible [3]. The crystal structure of the complexes will be shown as determined by single crystal X-ray diffraction, with the geometry of the coordination sphere fully characterized.

Absorption of light by the lanthanide-ligand ensemble was revealed by diffuse reflectance and luminescence properties of the powder sample, measured under different excitation energies, confirms the ligand-to-lanthanide energy transfer. The magnetic properties of the polycrystalline samples — as a function of temperature and field— confirms the single-lanthanide-ion behaviour and show slow magnetic relaxation behavior.

The potential use of this new family as multifunctional materials will be debated. Binnemans, Chem. Eliseeva and J. Bunzli, Acc. Resume : The recently re-discovered class of hybrid metal-halide perovskite semiconductors hold great promise for solar cells, LEDs and lasers. Resume : One key advantage of solution-processable organic semiconductors is the opportunity of blending different materials in order to attain novel material properties and applications.

The concept of ternary blend organic solar cells makes use of exactly that idea: three or more organic chromophores are combined to better match the solar irradiance spectrum and thus increase the amount of light absorbed, which, in turn, will increase the power output of the solar cell.

Lecture 6: Compound Semiconductor Materials Science (Designing 1D Quantum Well Heterostructures)

However, the charge transport limitations of many current generation polymer blends typically require rather low active layer thicknesses around nm for optimum performance. Motivated by the possibility to process thick-film devices based on ternary blends, we demonstrate solar modules consisting of three solar cells connected is series, delivering 8.

These results underscore the relevance of ternary photovoltaic polymer blends for future upscaling technologies. Reference: N. Gasparini, T. Ameri et al, Energy Environ. Resume : We report the control of spontaneous emission in a flexible all-polymeric microcavity FAPMC embedding a layer of a novel porphyrin polymer l-Pn near-infrared NIR emitter blended with poly 9,9-dioctylfluorenyl-alt-benzothiadiazole F8BT as fluorescent material.

This flexible, narrow and tunable light source could be usefully implemented in inexpensive lab-on-a-chip for photonic and sensing applications in NIR spectral region. Scotognella S. Varo, L. Criante, S. Gazzo, G. Manfredi, R. Knarr III, D. Springer International Publishing, Resume : Recently, NIR polymers have been employed as an electron donor material in organic solar cells because they can harvest many more photons in the solar light.

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However, most of NIR polymer solar cells still suffer from a low fill factor FF because of inefficient charge collection. For these solar cells, the FF decreases with increasing number of fluorine atoms attached in the polymer main chain. In order to discuss the origin of the lower FFs, we evaluated the bimolecular recombination rate krec by measuring transient photovoltage TPV and transient photocurrent TPC.

We conclude that the bimolecular recombination should be suppressed to improve the charge collection efficiency and hence PCE of NIR polymer solar cells furthermore. Kawashima, T. Fukuhara, Y. Suda, Y. Suzuki, T. Koganezawa, H. Yoshida, H. Ohkita, I. Osaka, K. Takimiya, J. Resume : Two-photon absorption 2PA brightness is a non-linear optical phenomenon with broad scope of applications.

Optimum Design of Organic Electrochemical Type Transistors for Applications in Biochemical Sensing

It has already been applied, or is under intensive investigation, in fields such as: optical limiting, polymerization-microfabrication, 3D-data storage, photodynamic therapy, two-photon excited fluorescence etc. Strategic placement of a fluorene scaffold at the periphery of a diketopyrrolopyrrole via tandem Friedel-Crafts-dehydratation reactions, resulted in dyes with supreme solubility.