Molecular Ionic Junction for Enhanced Electronic Charge Transfer

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• 作者：Henk J. Bolink ; Etienne Baranoff ; Miguel Clemente-Leó ; n ; Eugenio Coronado ; Angel Lopé ; z-Muñ ; oz ; Diego Repetto ; Michele Sessolo ; Md. K. Nazeeruddin
• 刊名：Langmuir
• 出版年：2009
• 出版时间：January 6, 2009
• 年：2009
• 卷：25
• 期：1
• 页码：79-83
• 全文大小：221K
• 年卷期：v.25,no.1(January 6, 2009)
• ISSN：1520-5827

文摘

We present the first evidence of charge injection improvement in an organic electroluminescent device provided by a single ionic molecular layer. A hole-dominated, hybrid organic−inorganic light-emitting device is used as a probe to verify the effectiveness of the ionic compound monolayer on modifying the metal oxide cathode. The rearrangement of ions under an applied bias induces a strong field at the electrode−organic interface resulting in an enhancement of the electron injection into the organic semiconductor. A strong decrease in turn-on voltage for electroluminescence is observed for the device containing the ionic molecular monolayer.