Novel 2-hexylthieno[3,2-b]thiophene-containing conjugated molecules have been synthesized via a reduction reaction using tin chloride in an acidic medium. They exhibited good solubility in common organic solvents and good self-film and crystal-forming properties. The single-crystalline objects were fabricated by a solvent slow diffusion process and then were employed for fabricating field-effect transistors (FETs) along with thinfilm transistors (TFTs). TFTs made of 5 and 6 exhibited carrier mobility as high as 0.10-0.15 $cm^2V^-1}s^-1}$. The single-crystal-based FET made of 6 showed 0.70 $cm^2V^-1}s^-1}$ which was relatively higher than that of the 5-based FET ($\mu}=0.23cm^2V^-1}s^-1}$). In addition, we fabricated organic photovoltaic (OPV) cells with new 2-hexylthieno [3,2-b]thiophene-containing conjugated molecules and methanofullerene [6,6]-phenyl C61-butyric acid methyl ester ($PC_61}BM$) without thermal annealing. The ternary system for a bulk heterojunction (BHJ) OPV cell was elaborated using $PC_61}BM$ and two p-type conjugated molecules such as 5 and 7 for modulating the molecular energy levels. As a result, the OPV cell containing 5, 7, and $PC_61}BM$ had improved results with an open-circuit voltage of 0.90 V, a short-circuit current density of 2.83 $mA/cm^2$, and a fill factor of 0.31, offering an overall power conversion efficiency (PCE) of 0.78%, which was larger than those of the devices made of only molecule 5 ($\eta}$~0.67%) or 7 ($\eta}$~0.46%) with $PC_61}BM$ under identical weight compositions.
合成了包含2-己基
噻吩[3,2-b]
噻吩的共轭分子,采用在酸性介质中使用
氯化锡的还原反应。这些分子在常见有机溶剂中表现出良好的溶解性以及良好的自制膜和晶体形成特性。通过溶剂缓慢扩散过程制备了单晶物体,随后用于制造场效应晶体管(FETs)和薄膜晶体管(TFTs)。由5和6制成的TFTs展现出高达0.10-0.15
$cm^2V^-1}s^-1}$的载流子迁移率。基于6的单晶FET表现出0.70
$cm^2V^-1}s^-1}$的迁移率,相对高于基于5的FET(
$\mu}=0.23cm^2V^-1}s^-1}$)。此外,我们还利用新的2-己基
噻吩[3,2-b]
噻吩含有的共轭分子和
甲烷富勒烯[6,6]-苯基C61-
丁酸甲酯(
$PC_61}BM$)制造了有机光伏(OPV)电池,而无需热退火。为大块异质结(BHJ)OPV电池构建了一个三元系统,采用<※>$PC_61}BM$和两种p型共轭分子,如5和7,来调节分子能级。因此,包含5、7和
$PC_61}BM$的OPV电池表现出改善的结果,开路电压为0.90 V,短路电流密度为2.83
$mA/cm^2$,填充因子为0.31,总体功率转换效率(PCE)为0.78%,高于仅由分子5(
$\eta}$~0.67%)或7(
$\eta}$~0.46%)与
$PC_61}BM$在相同重量配比下制成的器件。