Journal
JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS
Volume 39, Issue 9A, Pages 5301-5309Publisher
JAPAN SOC APPLIED PHYSICS
DOI: 10.1143/JJAP.39.5301
Keywords
aluminumquinoline; multilayer structure; type-I and type-II energy lineups; photoluminescence dynamics; energy transfer
Categories
Ask authors/readers for more resources
Photoluminescence (PL) dynamics of aluminumquinoline (Alq(3); tris(8-hydroxyquinoline) aluminum)-based organic multilayer structures, i.e., Alq(3)/oxadiazole (t-BuPBD; (2-(4-biphenylyl)-5-(4-tert-butylphenyl) 1,3,4-oxadiazole), Alq(3)/cyclopentadiene (PPCP; 1,2,3,4,5-pentaphenyl-1,3-cyclopentadiene and Alq(3)/diamine (TPD; N,N'-diphenyl-N,N'-bis-(3-methylphenyl)-[1,1 '-biphenyl]-4,4'-diamine), which possess different types of energy lineups (equivalent to types I and II of inorganic semiconductor multilayer structures) of the highest occupied molecular orbital (HOMO) and the lowest unoccupied molecular orbital (LUMO) energy levels, were investigated and compared. The fast energy transfer followed by strong PL in Alq3 was proved for Alq(3)/PBD which is of type-I energy lineup, while the tendency of separation of excitons, i.e., electrons and holes generated in the excited molecules, was demonstrated for Alq(3)/PPCP and Alq(3)/TPD which are of type II. These results indicate that the energy lineup with respect to HOMO and LUMO energy levels can be a guideline for luminescence dynamics in organic multilayer structures.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available