Article ID Journal Published Year Pages File Type
1264047 Organic Electronics 2012 5 Pages PDF
Abstract

Charge transport and gas sensing characteristics of cobalt phthalocyanine films deposited along (ATB) and perpendicular (PTB) to the natural twin boundaries of (0 0 1) LaAlO3 substrate have been investigated. The charge carrier mobility of ATB films (∼5 cm2 V−1 s−1) is five orders of magnitude higher compared to that of PTB films (∼7 × 10−5 cm2 V−1 s−1), suggesting that twin boundaries acts like a template for ordering of molecules. The ATB films on exposure to ammonia showed a reversible increase of resistance, with fast response and recovery. In contrast PTB films showed same sensitivity, but exhibits base resistance drift along with sluggish response.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► CoPc films were deposited on LaAlO3 substrates with natural twin boundaries. ► The resistivity of films along twin boundaries is very low compared to perpendicular. ► These films exhibit high sensitivity and fast response/recovery on exposure to ammonia.

Related Topics
Physical Sciences and Engineering Chemistry Chemistry (General)
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