Observation of the Mott–Gurney law in tris (8-hydroxyquinoline) aluminum films

Autor:	Paolo A. Losio, Peter Günter, Michael Kiy, A. Tapponnier, Marlus Koehler, Ivan Biaggio
Rok vydání:	2002
Předmět:	Electron mobility Materials science Physics and Astronomy (miscellaneous) Condensed matter physics Analytical chemistry chemistry.chemical_element Thermal conduction Amorphous solid chemistry Aluminium Electric field Thin film Order of magnitude Voltage
Zdroj:	Applied Physics Letters. 80:1198-1200
ISSN:	1077-3118 0003-6951
Popis:	We show that tris (8-hydroxyquinoline) aluminum (Alq3) thin films produced and characterized under ultrahigh vacuum conditions present a well-defined squared-law dependence of the injected current on the applied voltage at applied electric fields of the order of 0.25–1 MV/cm. From this, one derives an electric-field-independent electron mobility of the order of 10−7 cm2/(V s), with a variation between different samples of about one order of magnitude. Observations of current–voltage characteristics with clear indications of trap-filling and space-charge-limited conduction at high fields in Alq3 excludes the existence of traps with an exponential distribution of trap energies, as is commonly assumed in amorphous materials.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::4d1c37d552dcc55a9faf5fe60f75a9b2 https://doi.org/10.1063/1.1449527 Zobrazit plný text záznamu