Photoconductive Properties of Dibenzotetrathiafulvalene-Tetracyanoquinodimethane (DBTTF-TCNQ) Nanorods Prepared by the Reprecipitation Method
Photoconductive Properties of Dibenzotetrathiafulvalene-Tetracyanoquinodimethane (DBTTF-TCNQ) Nanorods Prepared by the Reprecipitation Method
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再沉淀法制备二苯并四硫富瓦烯-四氰基醌二甲烷(DBTTF-TCNQ)纳米棒的光电导性能
DOI：
10.1166/jnn.2019.16346
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发表时间：
2019
影响因子：
--
通讯作者：
Masuhara Akito
中科院分区：
文献类型：
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作者：
Takeda Masaki;Hojo Kenta;Umemoto Kazuki;Scharber Markus Clark;Stadler Philipp;Yumusak Cigdem;Sariciftci Niyazi Serdar;White Matthew Shuette;Furis Madalina;Okada Shuji;Yoshida Tsukasa;Matsui Jun;Masuhara Akito
电荷转移复合晶体因其金属导电性、光电导性、双极电荷传输和高载流子迁移率而被广泛研究。关于它们在有机场效应晶体管和太阳能电池等有机电子器件中的应用的大量研究已经报道。然而，电荷转移复合物的大体积单晶难以处理，特别是难以制成薄膜形式。最近，电荷转移晶体的纳米/微米晶化被吸引来实现薄膜应用。本文采用再沉淀法制备了二苯并四硫富瓦烯-四氰基醌二甲烷（DBTTF-TCNQ）电荷转移复合纳米棒。所形成的纳米棒具有与通过缓慢蒸发溶剂制备的热力学稳定块状晶体不同的动力学亚稳态晶体结构。根据光电导测量，纳米棒堆叠显示出与块状晶体 (417.14 μA/W) 相当的显着光敏度 (354.57 μA/W)。这些结果表明，由于分子堆叠组装的差异，二苯并四硫富瓦烯-四氰基醌二甲烷（DBTTF-TCNQ）纳米棒具有有利于载流子传输的晶体结构。
Charge-transfer complex crystals have been extensively studied because of their metallic conductivity, photoconductivity, ambipolar charge transport, and high career mobility. Numerous studies of their applications for organic electric devices such as organic field effect transistors and solar cells have reported. However, bulky single crystals of charge-transfer complexes are difficult to handle, specifically to be made into a form of a thin film. Recently, nano/micro crystallization of charge-transfer crystal is attracted to realize thin film applications. In this paper, charge transfer complex nanorods composed of dibenzotetrathiafulvalene-tetracyanoquinodimethane (DBTTF-TCNQ) were prepared by the reprecipitation method. The as-formed nanorods possess a kinetically metastable crystal structure different from the thermodynamically stable bulk crystal prepared by slow evaporation of the solvent. From photoconductive measurement, nanorod stacks show a significant photosensitivity (354.57 μA/W) on par with bulk crystal (417.14 μA/W). These results suggest dibenzotetrathiafulvalene-tetracyanoquinodimethane (DBTTF-TCNQ) nanorods have a favorable crystal structure for carrier transport due to the difference of molecular stacking assembly.