Comparing the distribution of the electronic gap of an organic molecule with its photoluminescence spectrum

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Title: Comparing the distribution of the electronic gap of an organic molecule with its photoluminescence spectrum
Authors: Costa Milán, David | Villalvilla Soria, José Moisés | Díaz-García, María A. | Untiedt, Carlos
Research Group/s: Grupo de Nanofísica | Física de la Materia Condensada
Center, Department or Service: Universidad de Alicante. Departamento de Física Aplicada
Keywords: STM | Organic molecules | Semiconductor gap | Photoluminescence
Knowledge Area: Física de la Materia Condensada | Física Aplicada
Issue Date: 26-Apr-2013
Publisher: American Institute of Physics
Citation: Applied Physics Letters. 2013, 102(16): 163307. doi:10.1063/1.4803169
Abstract: The electronic gap structure of the organic molecule N,N′-diphenyl-N,N′-bis(3-methylphenyl)-(1,1′-biphenyl)-4,4′-diamine, also known as TPD, has been studied by means of a Scanning Tunneling Microscope (STM) and by Photoluminescence (PL) analysis. Hundreds of current-voltage characteristics measured at different spots of the sample show the typical behavior of a semiconductor. The analysis of the curves allows to construct a gap distribution histogram which reassembles the PL spectrum of this compound. This analysis demonstrates that STM can give relevant information, not only related to the expected value of a semiconductor gap but also on its distribution which affects its physical properties such as its PL.
Sponsor: We acknowledge financial support of the Spanish Government (Grant Nos. FIS2010-21883-C02-01, MAT2011-28167-C02-01, and No. CONSOLIDER CSD2007-0010) and Comunidad Valenciana (ACOMP/2012/127 and PROMETEO/2012/011). This research has been partial funded by FEDER funds of the EU.
ISSN: 0003-6951 (Print) | 1077-3118 (Online)
DOI: 10.1063/1.4803169
Language: eng
Type: info:eu-repo/semantics/article
Rights: Copyright 2013 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.
Peer Review: si
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Appears in Collections:INV - Grupo de Nanofísica - Artículos de Revistas
INV - Física de la Materia Condensada - Artículos de Revistas

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