کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1264047 | 972098 | 2012 | 5 صفحه PDF | دانلود رایگان |

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.
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► 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.
Journal: Organic Electronics - Volume 13, Issue 11, November 2012, Pages 2600–2604