A teaching strategy to understand the Solid State Chemistry for high level education students: an experience with a phosphorescence material
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Otros documentos de la autoría: Stilbyte, Viktorija; Peña-Huguet, Iván; Pérez Maseda, Marta; Mollar Cuni, Andrés; Gutiérrez-Blanco, María; Rueda, Celia M.; Serna Gallen, Pablo; Fortuño-Morte, Maria; Beltrán Mir, Héctor; Cordoncillo, Eloisa
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Título
A teaching strategy to understand the Solid State Chemistry for high level education students: an experience with a phosphorescence materialAutoría
Fecha de publicación
2018-07Editor
International Academy of Technology, Education and Development (IATED)ISBN
978-84-09-02709-5ISSN
2340-1117Cita bibliográfica
V. Stilbyte, I. Peña-Huguet, M. Pérez-Maseda, A. Mollar-Cuni, M. Gutiérrez-Blanco, C.M. Rueda, P. Serna-Gallen, M. Fortuño-Morte, H. Beltrán-Mir, E. Cordoncillo (2018) A TEACHING STRATEGY TO UNDERSTAND THE SOLID STATE CHEMISTRY FOR HIGH LEVEL EDUCATION STUDENTS: AN EXPERIENCE WITH A PHOSPHORESCENCE MATERIAL, EDULEARN18 Proceedings, pp. 794-801.Tipo de documento
info:eu-repo/semantics/conferenceObjectVersión de la editorial
https://library.iated.org/view/STILBYTE2018ATEVersión
info:eu-repo/semantics/publishedVersionPalabras clave / Materias
Resumen
Solid state chemistry has attracted the attention of many fields due to its wealthy chemistry as well as
the versatility of its applications. Among the wide fields in this area, the light interaction with a solid
has ... [+]
Solid state chemistry has attracted the attention of many fields due to its wealthy chemistry as well as
the versatility of its applications. Among the wide fields in this area, the light interaction with a solid
has been selected in this experience to understand the phosphorescence process in a material. This
experience will allow students to understand an amazing phenomena which occurs in our quotidian life
as the light emission of fireflies, stickers or fireworks. A teaching strategy has been proposed for
undergraduate chemistry students, introducing them to the concepts of phosphorescence as well as
different techniques of characterization through a simple laboratory session based in the synthesis of
a phosphor material. Nowadays, it is a challenge to encourage students to properly understand
chemistry and materials science due to the importance that represents in our society.
Luminescence is a spontaneous light emission coming from excited electronic states after the
absorption of UV/visible light. These processes include triboluminescence, fluorescence,
phosphorescence, chemiluminescence and bioluminescence. In particular, phosphorescence visible
light on slow (minute to hour) time scales after the excitation source has been removed. Lanthanidedoped
strontium aluminate (Eu:SrAl2O4) is one of the most widely used phosphor owing to its green
environmental properties and their excellent features, like their long-lasting phosphorescence or their
potential applications in optoelectronic devices.
The aim of this work is showing an example to understand this energetic concept from the preparation
of a phosphorescent material based on the strontium aluminate structure. A new methodology of
synthesis derived of the Pechini’s method has been introduced to the students. The importance of
lanthanides ions has also been highlighted. Two common characterization techniques in Solid State
Chemistry are presented to the students: X-Ray Diffraction and Electron Microscopy. Finally,
phosphorescence properties have been studied in order to bring them closer in the complete
preparation of a material. It has allowed them to keep in contact during the whole experiment with the
three main concepts of Materials Science: synthesis, structure and properties. This fact makes the
work interesting not only from the point of view of students, also for teachers of inorganic chemistry
and material science and undergraduate students owing to its pedagogical character employing a
Problem Based Learning. [-]
Descripción
Proceeding of 10th International Conference on Education and New Learning Technologies (EDULEARN2018), 2nd-4th July 2018, Palma, Mallorca, Spain
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