Violet light emitting SrS/SrCl:Eu thin-film electroluminescent devices

• DOI: 10.1063/1.115514
• Publication Date: 2002-07-26T13:40:46Z
• Authors: W. Kong; S. Ahmed; J. Ferguson; R. Solanki
• Keywords: 02 engineering and technology; 0210 nano-technology

Emission of bright (over 9 cd/m2) violet light centered at 404 nm has been achieved from SrS:Eu thin-film electroluminescent (EL) devices. The brightness has remained stable after several hours of operation. The source of this light is believed to be the 5d–4f transition of Eu2+ in the SrCl2 host, which is formed near the ZnS/SrS interfaces within the sandwich structure of the EL devices. Similar device structures were also utilized to produce ultraviolet EL emission at 367 nm from SrCl2:Ce3+ layers. These devices were grown via atomic layer epitaxy.