NotesFAQContact Us
Collection
Advanced
Search Tips
Peer reviewed Peer reviewed
Direct linkDirect link
ERIC Number: EJ1151307
Record Type: Journal
Publication Date: 2017-Aug
Pages: 6
Abstractor: As Provided
ISBN: N/A
ISSN: ISSN-0021-9584
EISSN: N/A
Preparing, Characterizing, and Investigating Luminescent Properties of a Series of Long-Lasting Phosphors in a SrO-Al[subscript 2]O[subscript 3] System: An Integrated and Inquiry-Based Experiment in Solid State Chemistry for the Undergraduate Laboratory
Ma, Yan-Zi; Jia, Li; Ma, Kai-Guo; Wang, Hai-Hong; Jing, Xi-Ping
Journal of Chemical Education, v94 n8 p1157-1162 Aug 2017
An integrated and inquiry-based experiment on solid state chemistry is applied to an inorganic chemistry lab course to provide insight into the characteristics of the solid phase reaction. In this experiment, students have the opportunity to synthesize long-lasting phosphors with formula xSrO·yAl[subscript 2]O[subscript 3]:Eu[superscript 2+], Dy[superscript 3+], by means of precipitation and high temperature methods, and to characterize them by powder X-ray diffractometry. The luminescent properties of the phosphors are also suitable for investigation by student research teams with the assistance of solid fluorescence analysis. With a change in the Sr/Al ratio of strontium aluminates, the phosphors show distinct emission bands, and with a change in the content of Dy in a certain range, the different data of luminescence intensity and decay time can be obtained. By analyzing the crystal structures and photoluminescence mechanism of products, students can better understand abstract concepts of luminescent solid materials, including nonstoichiometric compounds, extrinsic point defects, crystalline fields in the solid state, band levels, and hole and electron transfer.
Division of Chemical Education, Inc and ACS Publications Division of the American Chemical Society. 1155 Sixteenth Street NW, Washington, DC 20036. Tel: 800-227-5558; Tel: 202-872-4600; e-mail: eic@jce.acs.org; Web site: http://pubs.acs.org/jchemeduc
Publication Type: Journal Articles; Reports - Descriptive
Education Level: Higher Education
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A
Grant or Contract Numbers: N/A