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Identifying the roles of the excited states on the magnetoconductance in tris-(8-hydroxyquinolinato) aluminum
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/content/aip/journal/apl/102/11/10.1063/1.4795937
2013-03-18
2014-11-29

Abstract

Magnetoconductance response (MC) in illuminated tris-(8-hydroxyquinolinato) aluminum (Alq3) single layer has been studied to clarify the role of excitons and electron-hole (e-h) pairs on the MC generation. By fitting the MC curves at different bias conditions, the contribution of e-h pairs and excitons to the MC can be differentiated in the same material. The fitting results indicated that hyperfine mixing between the singlet and triplet e-h pairs results in a Lorentzian type MC within hyperfine field and charge reaction of triplet excitons induces a high-field MC following a non-Lorentzian shape, respectively. Moreover, the characteristic field width for the high-field MC is very different at forward and reverse bias regime, implying that the rate strength for the hole/electron-exciton reactions in Alq3 should be treated separately.

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Scitation: Identifying the roles of the excited states on the magnetoconductance in tris-(8-hydroxyquinolinato) aluminum
http://aip.metastore.ingenta.com/content/aip/journal/apl/102/11/10.1063/1.4795937
10.1063/1.4795937
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