期刊
ACS APPLIED MATERIALS & INTERFACES
卷 1, 期 9, 页码 2071-2079出版社
AMER CHEMICAL SOC
DOI: 10.1021/am9004418
关键词
organic thin-film transistor; diazapentacenes; induced crystallization; pentacene; film morphology
资金
- National Science Council, Taiwan, Republic of China
- Academia Sinica
5,7,12,14-Tetrachloro-6,13-diaza-6,13-dihydropentacene (TCDAHP) and 5,7,12, 14-tetrachloro-6,13-diazapentacene (TCDAP) were synthesized and assessed as the active channel materials for thin-film transistor applications. Analyses of the crystal structures of these molecules revealed that both exhibited slipped pi-pi stacking of the long and fused aromatic moiety. Although the packing Features of the two compounds are basically identical, their highest occupied molecular orbitals, which are relevant to hole transport, are very different. Better mobility was predicted for TCDAHP over TCDAP based on the dimeric structure in: the X-ray coordinates. The morphologies of thin films of TCDAHP and TCDAP prepared by thermal evaporation depend critically on the substrate on which the molecules were deposited: from the amorphous state on a SiO2/Si surface to the crystalline state on a pentacene buffer layer surface. The performance of chin-film transistors prepared on various Substrate surfaces was studied. While no field-effect mobility was observed for these films deposited on SiO2/Si, a high mobility of 1.4 cm(2)/(V s) For the TCDAHP film was achieved when deposited on a pentacene buffer layer prepared on a rubbed monolayer of n-nonyltrichlorosilane on a SiO2/Si surface, A similar device prepared from TCDAP gave a mobility of 0.13 cm(2)/(V s).
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据