有機半導體是各類光電設備中非常重要的一種材料。然而n型有機半導體（電子傳輸）的開發遠遠落後與p型（孔穴傳輸）有機半導體。近日，來自中國科學院長春應用化學研究所的研究團隊開發了一種方式，利用硼氮配位鍵（B←N）設計n型有機半導體。研究者們合成了一種新的n型並苯，具有最低未佔有分子軌道能量級和n型特性。這篇文章發表在近期出版的《德國應用化學》上。
n-Type Azaacenes Containing B←N Units
Yang Min,Chuandong Dou,* Hongkun Tian, Yanhou Geng, Jun Liu,* and Lixiang Wang
Abstract
We disclose a novel strategy to design n-type acenes through the introduction of boron–nitrogen coordination bonds (B←N). We synthesized two azaacenes composed of two B←N units and six/eight linearly annelated rings. The B←N unit significantly perturbed the electronic structures of the azaacenes: Unique LUMOs delocalized over the entire acene skeletons and decreased aromaticity of the B←N-adjacent rings. Most importantly, these B←N-containing azaacenes exhibited low-lying LUMO energy levels and high electron affinities, thus leading to n-type character. The solution-processed organic field-effect transistor based on one such azaacene exhibited unipolar n-type characteristics with an electron mobility of 0.21 cm2 V−1 s−1.
點擊「閱讀原文」查看全文