复旦大学王洋团队报道了双（苯并硒二唑）乙烷——空穴和电子迁移率超过10cm²V^-1s^-1，用于双极性聚合物晶体管的π-扩展受主二聚体单元 。相关研究成果于2024年3月5日发表在国际顶尖学术期刊《德国应用化学》。

缺乏平衡空穴（μh）和电子迁移率（μe）>10cm²V^-1s^-1的双极性聚合物，是开发有机集成电路的主要瓶颈。

该文中，研究人员展示了π-延伸的含硒受体二聚体单元的设计和合成，即苯并[c][1,2,5]硒二唑-4-基）乙烷（BBSeE），以解决这一难题。与硫对应物相比，BBSeE表现出更深的前沿分子轨道能级和更强的吸电子特性。BBSeE的成功锡化为获得受体-受体共聚物pN-BBSeE提供了一个很好的机会，其显示出更窄的带隙、更低的最低未占分子轨道能级（4.05eV）和更高程度的主链平面性。

因此，基于pN-BBSeE的有机晶体管显示出理想平衡的双极传输，μh和μe分别为10.08和10.15 cm²V^-1s^-1。同时，μh/μe值>10.0 cm²V^-1s^-1是有史以来报道的双极性聚合物的最佳性能。此外，pN-BBSeE表现出优异的货架储存稳定性，在储存两个月后保持了85%以上的初始迁移率值。

研究表明，π-扩展受体二聚体BBSeE是构建应用于，下一代有机集成电路高性能双极性聚合物的一种很有前途的受体构建块。

附：英文原文

Title: Bis(benzoselenadiazol)ethane: A π-Extended Acceptor-Dimeric Unit for Ambipolar Polymer Transistors with Hole and Electron Mobilities Exceeding 10 cm2 V−1 s−1

Author: Di Liu, Yinghan Zhao, Jianqi Zhang, Zhixiang Wei, Yunqi Liu, Yang Wang

Issue&Volume: 2024-03-05

Abstract: The lack of ambipolar polymers with balanced hole (μh) and electron mobilities (μe) >10 cm2 V1s1 is the main bottleneck for developing organic integrated circuits. Herein, we show the design and synthesis of a π-extended selenium-containing acceptor-dimeric unit, namely benzo[c][1,2,5]selenadiazol-4-yl)ethane (BBSeE), to address this dilemma. In comparison to its sulfur-counterpart, BBSeE demonstrates deeper frontier molecular orbital levels and stronger electron-withdrawing properties. The successful stannylation of BBSeE offers a great opportunity to access acceptor-acceptor copolymer pN-BBSeE, which shows a narrower band gap, lower-lying lowest unoccupied molecular orbital level (4.05 eV), and a higher degree of backbone planarity. Consequently, the pN-BBSeE-based organic transistors display an ideally balanced ambipolar transport with μh and μe of 10.08 and 10.15 cm2 V1 s1, respectively. To the best of our knowledge, the simultaneous μh /μe values >10.0 cm2 V1 s1 are the best performances ever reported for ambipolar polymers. In addition, pN-BBSeE shows an excellent shelf-storage stability, retaining over 85% of the initial mobility values after two months storage. Our study demonstrates the π-extended acceptor-dimeric BBSeE is a promising acceptor building block for constructing high-performance ambipolar polymers applied in next-generation organic integrated circuit.

DOI: 10.1002/anie.202400061

Source: https://onlinelibrary.wiley.com/doi/10.1002/anie.202400061