Thin Films of Highly Planar Semiconductor Polymers Exhibiting Band-like Transport at Room Temperature
Thin Films of Highly Planar Semiconductor Polymers Exhibiting Band-like Transport at Room Temperature
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DOI：
10.1021/jacs.5b04253
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发表时间：
2015-07-01
影响因子：
15
通讯作者：
Kang, Moon Sung
中科院分区：
文献类型：
--
作者：
Lee, Jiyoul;Chung, Jong Won;Kang, Moon Sung
我们报道了在室温下从印刷聚合物薄膜中观察到的带状输运。这是通过供体-受体型噻吩-噻唑共聚物实现的，该共聚物经过精心设计，以提高主链的平面度和大分子之间的转移积分。由于强烈的分子相互作用，打印的聚合物薄膜具有与分子单晶相当的极低的陷阱密度。此外，电场可以很容易地降低电荷输运的能垒高度，从而导致室温下类带电荷输运的扩展电子态的形成。
We report the observation of band-like transport from printed polymer thin films at room temperature. This was achieved from donor-acceptor type thiophene-thiazole copolymer that was carefully designed to enhance the planarity of the backbone and the resulting transfer integral between the macromolecules. Due to the strong molecular interaction, the printed polymer film exhibited extremely low trap density comparable to that of molecular single crystals. Moreover, the energy barrier height for charge transport could be readily reduced with the aid of electric field, which led formation of extended electron states for band-like charge transport at room temperature.