Tuning energy levels in magnesium modified Alq3

Chien Hung Lin, Chi Ta Chou, Yu Hung Chen, Meng Hsiu Wu, Jiun Haw Lee, Chih I. Wu, Surojit Chattopadhyay, Chin Hsin J. Liu, Ker Jar Song, Yian Tai, Juen Kai Wang, Kuei Hsien Chen, Li Chyong Chen*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


The low molecular weight tris-(8-hydroxyquinoline) aluminum (Alq 3) has been modified with magnesium (Mg) incorporation that altered the nature of its opto-electronic characteristics. Ultraviolet photoelectron spectroscopy and optical absorption measurements yielded quantitative energy positions of the electronic states of the Mg:Alq3, its highest occupied molecular orbitals (HOMO) and lowest unoccupied molecular orbitals (LUMO), and resultant shifts thereof due to the Mg incorporation. Consistent lowering of the HOMO and LUMO with Mg incorporation and a new distribution of the HOMO-LUMO separation are observed.

Original languageEnglish
Article number083541
JournalJournal of Applied Physics
Issue number8
StatePublished - 15 Apr 2011


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