Luminescence in the LiF–MgF2 System Activated by Rare Earths

Journal of Applied Spectroscopy - In recent years, several reports have appeared on luminescence in LiMgF3. Important applications have also been claimed. There is no record of LiMgF3 in the ICDD...     

Synthesis and Luminescence of Ba2ScCl7

Physics of the Solid State - New results on luminescence in Ba2ScCl7 are reported. Lanthanides Eu2+ and Ce3+ were chosen as activators. The phosphors could be prepared by a simple wet chemical...     

Cu2S nanocrystals incorporated highly efficient non-fullerene ternary organic solar cells

Here, we report Cu₂S nanocrystals based non-fullerene ternary polymer solar cells by incorporating Cu₂S in conjugated polymer (PBDB-T: poly[(2,6-(4,8-bis(5-(2-ethylhexyl)thiophen-2-yl)-benzo[1,2-b:4,5-b′]dithiophene))-alt-(5,5-(1′,3′-di-2-thienyl-5′,7′-bis(2-ethylhexyl) benzo[1′,2′-c:4′,5′-c′]dithiophene-4,8-dione))]) and small molecule non-fullerene compound (ITIC:3,9-bis(2-methylene-(3-(1,1-dicyanomethylene)-indanone))-5,5,11,11-tetrakis(4-hexylphenyl)-dithieno[2,3-d:2′,3′-d′]-s-indaceno[1,2-b:5,6-b′]dithiophene). The devices were fabricated in inverted configuration i.e. ITO/ZnO/PBDB-T: Cu₂S NCs: ITIC/MoO₃/Ag. Effect of concentration of Cu₂S nanocrystals on the performance parameters of PBDB-T: ITIC based organic solar cells is studied. An enhancement in the power conversion efficiency from 8.24% to 9.53% is achieved for the optimum concentration of Cu₂S nanocrystals in the organic photoactive blend. The cause of improvement in the performance parameters of the device is investigated by means of the light intensity dependent electrochemical impedance spectroscopy and atomic force microscopy. It is found that the devices with Cu₂S nanocrystals have less trap-assisted recombination.     

Design,synthesis and antifungal evaluation of novel benzimidazole tertiary amine type of fluconazole analogues

A novel series of compounds containing tertiary amine moiety, substituted benzimidazole and triazole ring, initial design by molecular docking study of this scaffold at the active site of the fungal enzymes lanosterol 14α-demethylase (homology modeled of C. albicans) was synthesized by microwave irradiation and characterized by Proton Nuclear Magnetic Resonance (¹H NMR), Infra Red (IR), and Mass Spectroscopy (MS), and by elemental analysis. The screening of compound for in vitro (turbidimetric method) and in vivo (kidney burden test) antifungal activity against C. albicans revealed activity in many of the compounds as comparable to that of fluconazole.     

Preparation and characterization of LiAEAlF6:Eu (AE=Mg, Ca, Sr or Ba) phosphors

Wet chemical synthesis of LiAEAlF₆:Eu (AE=Mg, Ca, Sr or Ba) phosphors is described. Formation of single-phase compounds LiCaAlF₆ and LiSrAlF₆ was confirmed by XRD. LiCaAlF₆:Eu and LiSrAlF₆:Eu phosphors exhibited broadband emission corresponding to intraconfigurational transition 4f⁶5d¹→4f⁷(⁸S_7/2). LiMgAlF₆:Eu exhibits a narrow line emission corresponding to ⁶P_J→⁸S_7/2 transition of 4f⁷ configuration besides the band emission. LiBaAlF₆:Eu, on the other hand, was found to yield predominantly line emission.     

Wet Chemical Synthesis and Study of Luminescence in Some Eu2+ Activated AEMgF4 Hosts

Physics of the Solid State - Synthesis of alkaline-earth complex fluoride such as BaMgF4 (BMF), SrMgF4 (SMF), and CaMgF4 (CMF) was attempted through a simple wet chemical method. All these...