One-step fabrication of ordered organic crystalline array for novel optoelectronic applications

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• 作者：Biswanath  ; Mukherjee^a ;   ; ^{biswanath.mukh@gmail.com} ; Moumita  ; Mukherjee^b
• 关键词：Organic semiconductor ; TCNQ ; Field-effect transistor ; Ordered crystals ; Optoelectronics ; Solution processed
• 刊名：Organic Electronics
• 出版年：2011
• 出版时间：December 2011
• 年：2011
• 卷：12
• 期：12
• 页码：1980-1987
• 全文大小：1662 K

文摘

We report the fabrication of ordered crystalline array of low molar-mass, soluble organic compounds (TCNQ, TTF) in large scale by a simple solution casting technique requiring no additional surface treatment. Different solvents and different processing conditions have been applied to find the optimum conditions for direct growth of the ordered crystalline arrays. Based on these crystalline arrays, organic field-effect transistors (OFETs) and photodetectors (PDs) have been fabricated which exhibited excellent device performances. TCNQ (TTF) based OFETs exhibited a low threshold voltage, high on/off current ratio (?0³) and a field-effect mobility as high as ?.02 (0.05) cm² V^? s^?. The ordered organic crystalline arrays, used in the fabrication of PDs, showed reproducible and reversible photoswitching characteristics with photo to dark current conversion ratio ?0. This one-step, solution-based, self-assembly method for ordered array of different organic crystals in large area could have significant potential for future large-scale and low-cost optoelectronic devices. In addition, this study may encourage the researchers to synthesize and investigate for different organic materials capable of forming high quality nano/micro crystalline structures for various applications in plastic electronic devices.