Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1264047 | Organic Electronics | 2012 | 5 Pages |
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.