Synthesis and optical reactivity of 6,13-α-diketoprecursors of 2,3,9,10-tetraalkylpentacenes in solution, films and crystals
作者:Shuhei Katsuta、Hiroyuki Saeki、Katsuki Tanaka、Yuki Murai、Daiki Kuzuhara、Masahiro Misaki、Naoki Aratani、Sadahiro Masuo、Yasukiyo Ueda、Hiroko Yamada
DOI:10.1039/c3tc31824a
日期:——
Tetraalkylpentacenes having alkyl chains at 2,3,9,10-positions (Et-PEN, Pr-PEN and Hex-PEN) were prepared from their precursors Et-PDK, Pr-PDK and Hex-PDK, respectively. Photoreactions proceeded both in solutions, thin-films, and crystals, thus the properties of Et-PDK in films can be studied despite the instability of the pentacenes in solution. Et-PEN showed significantly different aggregation-nature compared with the parent pentacene. The hole mobilities of Et-PEN and Pr-PEN in films were 3.4 Ã 10â6 and 8.1 Ã 10â7 cm2 Vâ1 sâ1, respectively, determined by space-charge-limited current measurement, comparable with the order 10â6 cm2 Vâ1 sâ1 of the electron mobility of Alq3.
在2,3,9,10-位置具有烷基链的四烷基戊苯(Et-PEN、Pr-PEN和Hex-PEN)分别从它们的先驱物Et-PDK、Pr-PDK和Hex-PDK制备而成。光反应在溶液、薄膜和晶体中进行,因此尽管戊苯在溶液中不稳定,也可以研究Et-PDK在薄膜中的性质。Et-PEN与母体戊苯相比,表现出显著不同的聚集性质。通过空间电荷限制电流测量,Et-PEN和Pr-PEN在薄膜中的空穴迁移率分别为3.4 × 10⁻6和8.1 × 10⁻7 cm² V⁻¹ s⁻¹,与Alq3的电子迁移率在10⁻6 cm² V⁻¹ s⁻¹数量级相当。