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控制溶液态聚合物聚集体的动力学用于实现聚合物半导体的高效n掺杂
作者:小柯机器人 发布时间:2021/1/10 19:41:27

北京大学雷霆团队通过控制溶液态聚合物聚集体的动力学用于实现聚合物半导体的高效n掺杂。 相关研究成果发表在2021年1月06日出版的《德国应用化学》。

聚合物半导体的掺杂通常受到聚合物和掺杂剂之间相容性问题的限制。尽管人们致力于通过化学改性来提高聚合物半导体的相容性,但n掺杂聚合物半导体的电导率通常低于10S cm  1。

该文中,研究人员开发了一种通过调节共轭聚合物的溶液态聚集体来克服相容性问题。研究人员发现共轭聚合物的溶液态聚集体不仅随溶剂和温度而变化,而且随溶液老化时间而变化。调节溶液态聚合物聚集体可以直接影响其固态微观结构和与掺杂剂的相容性。结果表明,同时获得了高掺杂效率和高载流子迁移率。研究了聚合物聚集体的动力学行为后,n型掺杂的P(PzDPP-CT2)电导率可调谐到32.1 S cm  1。

该方法还可用于提高其它具有不同聚集倾向和行为的聚合物体系(如N2200)的掺杂效率。

研究结果揭示了聚合物聚集体的动力学以及对固态微结构和掺杂效率的影响的重要性。

附:英文原文

Title: Efficient n‐Doping of Polymeric Semiconductors through Controlling the Dynamics of Solution‐State Polymer Aggregates

Author: Miao Xiong, Xinwen Yan, Jia-Tong Li, Song Zhang, Zhiqiang Cao, Nathaniel Prine, Yang Lu, Jie-Yu Wang, Xiaodan Gu, Ting Lei

Issue&Volume: 06 January 2021

Abstract: Doping of polymeric semiconductors is often limited by the miscibility issue between polymers and dopants.  Although significant efforts have been devoted to enhancing the miscibility via chemical modification, the electrical conductivities of n‐doped polymeric semiconductors are usually below 10 S cm  1  . Here, we report a different approach to overcome the miscibility issue by modulating the solution‐state aggregates of conjugated polymers. We found that the solution‐state aggregates of conjugated polymers not only change with solvent and temperature but also change with solution aging time. Modulating the solution‐state polymer aggregates can directly influence their solid‐state microstructures and miscibility with dopants. As a result, both high doping efficiency and high charge carrier mobility were simultaneously obtained.  The n‐doped electrical conductivity of P(PzDPP‐CT2)  can be tuned up to 32.1 S cm  1  after exploring the dynamics of the polymer aggregates. This method can also be used to improve the doping efficiency of other polymer systems (e.g. N2200) with different aggregation tendencies and behaviors. Our results highlight the importance of understanding the dynamics of the polymer aggregates and the influence on the solid‐state microstructures and doping efficiency.

DOI: 10.1002/anie.202015216

Source: https://onlinelibrary.wiley.com/doi/10.1002/anie.202015216

期刊信息

Angewandte Chemie:《德国应用化学》,创刊于1887年。隶属于德国化学会,最新IF:12.959
官方网址:https://onlinelibrary.wiley.com/journal/15213773
投稿链接:https://www.editorialmanager.com/anie/default.aspx