The University of Dublin | Trinity College -- Ollscoil Átha Cliath | Coláiste na Tríonóide
Trinity's Access to Research Archive
Home :: Log In :: Submit :: Alerts ::

PEER Project >
PEER Publications >

Please use this identifier to cite or link to this item:

Title: Molecular semiconductor-doped insulator (MSDI) heterojunctions as new transducers for chemical sensors
Keywords: Physical Sciences
Issue Date: 1-Dec-2011
Publisher: EDP Sciences
Abstract: Abstract This article describes a new principle of transduction involving an heterojunction between a Molecular Semiconductor and a Doped Insulator (MSDI). Herein, we report on an MSDI-based sensor featuring an heterojunction between a lutetium bisphthalocyanine (LuPc2), which acts as Molecular Semiconductor (MS) and a thin film of Doped Insulator (DI) made of substituted or fluorinated copper phthalocyanine (CuFnPc, where n = 0, 8, 16). Previously, we reported the peculiar effect of the heterojunction on the MSDI’s electronic behavior, suggesting this device as a new kind of transducer for gas chemosensing. Indeed, of particular significance was the key role of modulator played by the nature of the doped insulator sub-layer. While the MS thin film remains the only layer of the sensor exposed to gas atmosphere, the DI’s ability to tune the electronic characteristics of the organic heterojunction allows it to drastically affect the nature of the effective charge carriers. In particular, an increase in fluorination of the doped insulator can cause an inversion of the LuPc2 response toward electron accepting (ozone, ppb level) or donating (ammonia, ppm level) gases. The present work focuses on the structural, electronic and electrical properties of the MSDI heterojunction, which have been studied by UV-vis spectroscopy, atomic force microscopy, current-voltage measurements and chemical doping, in order to shed some light on this phenomenon. The unique ambipolar nature of LuPc2 is suggested to be the main property responsible for the MSDI’s unique behavior.
ISSN: 1286-0042 (pISSN)
1286-0050 (eISSN)
1286-0042 (ISSN)
DOI: 10.1051/epjap/2011110220
Rights: © The Author(s), 2011
EDP Sciences, 2011
This article is distributed under the terms of the Creative Commons Attribution Noncommercial License which permits any noncommercial use, distribution, and reproduction in any medium, provided the original author(s) and source are credited.
Affiliation: 9 Avenue Alain Savary - 21047 - Dijon - FRANCE (Bouvet, M.)
24227 - León - SPAIN (Parra, V.)
9 Avenue Alain Savary - 21047 - Dijon - FRANCE (Suisse, J.-M.)
Appears in Collections:PEER Publications

Files in This Item:

File Description SizeFormat
PEER_stage2_10.1051%2Fepjap%2F2011110220.pdf5.84 MBAdobe PDFView/Open

This item is protected by original copyright

Please note: There is a known bug in some browsers that causes an error when a user tries to view large pdf file within the browser window. If you receive the message "The file is damaged and could not be repaired", please try one of the solutions linked below based on the browser you are using.

Items in TARA are protected by copyright, with all rights reserved, unless otherwise indicated.


Valid XHTML 1.0! DSpace Software Copyright © 2002-2010  Duraspace - Feedback