Controlling Photoconductivity in PBI Films by Supramolecular Assembly.

Controlling Photoconductivity in PBI Films by Supramolecular Assembly.
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DOI:
10.1002/chem.201800201
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发表时间:
2018-03-15
期刊:
Chemistry (Weinheim an der Bergstrasse, Germany)
影响因子:
--
通讯作者:
Adams DJ
Adams DJ
中科院分区:
其他
文献类型:
--
作者:
Draper ER;Archibald LJ;Nolan MC;Schweins R;Zwijnenburg MA;Sproules S;Adams DJ

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二萘嵌苯双酰亚胺(PBIs)在溶液中自组装。PBI的溶解度通常通过选择酰亚胺位置上的取代基而改变。通常认为这种取代不会影响PBI的电子性质,并且自组装聚集体的性质基本上是孤立分子的性质。然而,取代基确实会影响自组装,导致形成的聚集体中可能存在不同的堆积。在这里,我们表明,由取代的PBIs库形成的薄膜的光电导性随着取代基的变化而变化很大,并证明这是由于它们包装的不同方式。我们的研究结果为通过仔细选择取代基控制聚集体结构来调节自组装PBI的光电性能提供了可能性,正如我们在这里以这种方式优化PBI薄膜的光电导性所证明的那样。
Perylene bisimides (PBIs) self‐assemble in solution. The solubility of the PBIs is commonly changed through the choice of substituents at the imide positions. It is generally assumed this substitution does not affect the electronic properties of the PBI, and that the properties of the self‐assembled aggregate are essentially that of the isolated molecule. However, substituents do affect the self‐assembly, resulting in potentially different packing in the formed aggregates. Here, we show that the photoconductivity of films formed from a library of substituted PBIs varies strongly with the substituent and demonstrate that this is due to the different ways in which they pack. Our results open the possibility for tuning the optoelectronic properties of self‐assembled PBIs by controlling the aggregate structure through careful choice of substituent, as demonstrated by us here optimising the photoconductivity of PBI films in this way.
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