| 摘要: | 我們已經開發出6,13-Bis-phenylethynyl-pentacene (BPE-Pen)、5,11-Bis(phenylethyny)anthradithiophene (BPE-ADT)、6,13-Bis(4- Pentanoylphenylethynyl)pentacene (BPPE-Pen)、6,13-Bis(4- Pentanoyl phenylethynyl)antradithiophen (BBPE-ADT)、6,13-Bis(4-triethylsiliylphenylethynyl)pentacene (BTPE-Pen)、6,13-Bis(4-Pentanoylphenyl) pentacene (BPP-Pen)、6,13-Bis(4-Pentanoylphenyl)antradithiophene(BPP-ADT)、6,13-Bis(4-triethylsiliylphenyl)pentacene (BTE-Pen)八種有機半導體分子，目前已測量出BPE-Pen、BPE-ADT、BTE-Pen具有P型有機半導體材料之特性，其中BPE-ADT載子移動率可達1.42 x 10-2 cm2 V-1 s-1。藉由X光單晶繞射的解析，發覺BPE-ADT、BPE-Pen其外接苯環與其中心結構非共平面，其分子間堆疊與pentacene相同為魚骨狀構型，但載子移動率仍不如預期。 元件製作的部分，由西北大學Tobin J. Marks實驗室協助製作，以上所合成出的可溶性半導體將使用溶劑製程及真空蒸鍍的方法來製作元件。目前這些新材料的元件製備條件仍在嘗試階段，希望能找出最適合的製程條件，以利未來對此類分子的材料做更多的結構改良，以期提昇穩定度、溶解度和載子移動率並製作出元件效能更佳的有機薄膜電晶體。 Two new soluble organic semiconductor material systems were investigated. The first system is based on pentacene (Pen), five new organic semiconductor materials: 6,13-Bis(phenylethynyl)pentacene (BPE-Pen)、6,13-Bis(4-pentanoylphenylethynyl)pentacene (BPPE-Pen)、6,13-Bis(4-triethylsiliylphenylethynyl)pentacene (BTPE-Pen)、6,13-Bis(4-pentanoylphenyl)pentacene (BPP-Pen)、6,13-Bis(4-triethylsiliylphenyl)pentacene (BTE-Pen) were prepared. The second system is based on anthradithiophene (ADT), three new organic semiconductor materials: 5,11-Bis(phenylethynyl)anthradithiophene (BPE-ADT)、5,11-Bis(4-pentanoylphenylethynyl)antradithiophene (BBPE-ADT)、5,11-Bis(4-pentanoylphenyl)antradithiophene (BPP-ADT) were synthesized. BPE-Pen、BPE-ADT、BTE-Pen exhibited as P-type semiconductor。BPE-ADT shows the stability enhancement and with current mobility of 1.4x10-2 cm2/Vs, on/off ratio ~ 104 and threshold voltage -6.0V. The molecular structures of BPE-ADT and BPE-pen have been determined by single-crystal X-ray diffraction and reveal their herringbone packing and the phenyl group in both compounds are not coplanar to the central moiety, leading to a not very high mobility. The device fabrications of all the eight materials are currently assisted by Tobin J. Marks group at Northwestern University, where the solution process and vacuum deposition will be examined. Hopefully, better mobility and easier fabrication will be obtained in the future. |
