Charge injection in organic light‐emitting diodes: Tunneling into low mobility materials

Autor:	I. D. Parker, Paul Davids, S.-H. M. Kogan, Darryl L. Smith
Rok vydání:	1996
Předmět:	Electron mobility Tunnel effect Materials science Physics and Astronomy (miscellaneous) Orders of magnitude (temperature) business.industry OLED Optoelectronics Charge carrier Electroluminescence business Quantum tunnelling Diode
Zdroj:	Applied Physics Letters. 69:2270-2272
ISSN:	1077-3118 0003-6951
DOI:	10.1063/1.117530
Popis:	We present device model calculations for the current–voltage (I–V) characteristics of organic diodes and compare them with measurements of structures fabricated using MEH‐PPV. The measured I–V characteristics have a Fowler–Nordheim (FN) functional form, but are more than three orders of magnitude smaller than the calculated FN tunneling current. We find that the low mobility of the organic materials leads to a large backflow of injected carriers into the injecting contact. These results account for the experimental observations and also demonstrate how transport layers in multilayer organic light‐emitting diodes can be used to improve carrier injection.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::0551d359c48c8c2068dcf0beba42ab5d https://doi.org/10.1063/1.117530 Zobrazit plný text záznamu