11 documents found, page 1 of 2
Dual Spectral Matching in Perovskite Solar Cells via Upconverting plus Downshif...
Palácio, Milliane P.S.; dos Santos, Luis P.M.; Barros, Leonardo C.E.; Oliveira, Nagyla; Coelho, Sergio F.N.; Coimbra, Edgar A.C.; Camilo, Daniel P.Maximizing solar cell efficiency is a critical step toward revolutionizing photovoltaic technologies and harnessing the full potential of light for energy conversion. This study investigates the incorporation of NaGdF4:Yb3+,Tm3+@NaGdF4:Eu3+(TMN) and NaGdF4:Yb3+,Er3+@NaGdF4:Eu3+(ERN) nanoparticles into perovskite solar cells (PSCs) to improve their power conversion efficiency. The nanoparticles were synthesized ...
pH-Sensitive fluorescent sensor for Fe(III) and Cu(II) ions based on rhodamine ...
Belko, Nikita; Maltanava, Hanna; Lugovski, Anatol; Ferreira, Rute A.S.; Correia, Sandra F.H.; Shabunya, Polina; Fatykhava, SviatlanaSpirocyclic rhodamine derivatives have great potential to be used as fluorescent sensors. Rho- damine B hydrazide (RBH) and its derivatives have been employed to detect various analytes. The interactions of a sensor with an analyte might result in the protonation or hydrolysis of the sensor. Understanding these processes is useful for developing new sensors with improved characteristics. In this work, the perfo...
Reprogrammable and Reconfigurable Photonic Molecular Logic Gates Based on Ln3+ ...
Zanella, S.; Hernández-Rodríguez, Miguel A.; Fu, L.; Carlos, Luís D.; Ferreira, Rute A.S.; Brites, C.D.S.The miniaturization of the silicon chips is reaching its physical limits, and the transistors are so small that current leakage will become an insurmountable problem. Additionally, the actual chip shortage makes clear the excessive world dependence on silicon, stressing the need for silicon-free computing strategies. Quantum computing process information by manipulating photons, and computation performed by ind...
Walsh-coded orthogonal chaotic shift keying for key distribution in visible lig...
Silvério, Tiago; Figueiredo, Gonçalo; Ferreira, Rute A.S.; André, Paulo S.In contemporary society, secure communications employing chaotic communication schemes have opened new challenges. Chaotic communication schemes in which signals are spectrally spread, with low power spectral density, become useful to improve resilience against multipath fading, making them increasingly important for indoor applications in the framework of visible light communication (VLC). Here, we will explor...
Phosphor-based green-emitting coatings for circadian lighting
Bispo-Jr, Airton G. [UNESP]; Lima, Sergio A.M. [UNESP]; Carlos, Luís D.; Ferreira, Rute A.S.; Pires, Ana M. [UNESP]Made available in DSpace on 2020-12-12T01:21:21Z (GMT). No. of bitstreams: 0 Previous issue date: 2020-08-01; Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq); Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP); Fuel Cell Technologies Office; Federación Española de Enfermedades Raras; Centro de Investigação em Materiais Cerâmicos e Compósitos; Light-emitting diodes (LEDs) combinin...
Efficient green-emitting Tb3+-doped di-ureasil coating phosphors for near-UV ex...
Fang, Ming; Bispo-Jr, Airton G. [UNESP]; Fu, Lianshe; Ferreira, Rute A.S.; Carlos, Luís D.Made available in DSpace on 2020-12-12T01:09:44Z (GMT). No. of bitstreams: 0 Previous issue date: 2020-03-01; Ministério da Ciência, Tecnologia e Ensino Superior; Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP); China Scholarship Council; Fundação para a Ciência e a Tecnologia; Light-emitting diodes (LEDs) are replacing conventional lighting sources, like incandescent and fluorescent lamps, due to...
Efficient green-emitting Tb3+-doped di-ureasil coating phosphors for near-UV ex...
Fang, Ming; Bispo-Jr, Airton G.; Fu, Lianshe; Ferreira, Rute A.S.; Carlos, Luís D.Light-emitting diodes (LEDs) are replacing conventional lighting sources, like incandescent and fluorescent lamps, due to their higher efficiency, lower energy consumption and environmental friendliness characteristics. Additional applications envisaging “engineered light” able to control the human circadian rhythm are now in place with emphases on green-emitting LEDs. In this work, transparent and flexible coa...
Surface crystallization of ionic liquid crystals
Martins, Mónia A.R.; Carvalho, Pedro J.; Alves, Douglas; Dariva, Cláudio; Costa, Mariana C.; Ferreira, Rute A.S.; André, Paulo S.; Morgado, PedroThe evidence for surface crystallization in ionic liquids is scarce. The existing reports seem to be contradictory as for its driving forces, since in the two compounds investigated in the literature, the contribution of coloumbic and van der Waals forces is very different. In this work 1-dodecyl-3- methylimidazolium tetrafluoroborate was studied and its surface crystallization characterized by surface tension,...
UV-converting blue-emitting polyfluorene-based organic-inorganic hybrids for so...
Santos, Thays C.F.; Rodrigues, Rebeca R.; Correia, Sandra F.H.; Carlos, Luís D.; Ferreira, Rute A.S.; Molina, Celso; Péres, Laura O.Solid state lighting (SSL) revolutionized the light sources and displays market. Challenges include the seek for low cost and efficient materials able to emit pure colours (red, green and blue). Herein, we report amine-functionalized organic/inorganic di-ureasil hybrids consisting of a siliceous skeleton and oligopolyether chains, d-U(600), modified by distinct concentration values of a blue emitting uncharged ...
Concentration dependence of the infrared photoluminescence of Pr3+ in fluoroind...
Ribeiro, Sidney J. L. [UNESP]; Galleani, Gustavo [UNESP]; Fortes, Luis [UNESP]; Manzani, Danilo [UNESP]; Ferreira, Rute A.S.; Carlos, Luis D.Made available in DSpace on 2018-12-11T17:29:32Z (GMT). No. of bitstreams: 0 Previous issue date: 2016-08-23; Infrared photoluminescence properties are investigated for Pr3+ containing fluoroindate glasses with formula (mol% compositions) (99-x)[40InF3-20SrF2-20BaF2-20ZnF2]:xPrF3 (x= 0.1, 0.2, 0.5, 1.0 and 2.0 mol%). Different mechanisms of population and quenching for Pr3+ 1D2 and 1G4 levels are shown from pho...