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The Institute of Chemistry of the Chinese Academy of Sciences has made important progress in the research of polymer field effect transistor materials
The Chinese Academy of Sciences has made important progress in the research of polymer field-effect transistor materials. With the strong support of the Chinese Academy of Sciences, the Ministry of Science and Technology, and the National Natural Science Foundation of China, relevant researchers in the Key Laboratory of Organic Solids Institute of the Institute of Chemistry, Chinese Academy of Sciences Great progress has been made in the research of semiconductor materials, and the relevant results were published in the recent international materials magazine Adv. Mater. Organic optoelectronic materials have received widespread attention due to their potential applications in low cost, flexible electronic paper, electronic radio frequency trademarks, and storage devices. Conjugated polymer optoelectronic materials are an important part of organic optoelectronic materials, especially in the preparation of solution-processable organic optoelectronic devices with obvious advantages. Therefore, the development of high-performance solution-processable new organic semiconductor materials is an urgent need to prepare large-area, low-cost organic circuits. Relevant researchers from the Key Laboratory of the Institute of Organic Solids reported a solution-processable, high-performance p-type polymer semiconductor material PDVT (Figure 1), and a solution-processable field-effect transistor device. The results show that: two The polymers all exhibit good hole transport properties, their mobility is higher than 2.0cm2 / V? S, and the current switching ratio is about 105 ~ 107. Among them, the mobility of the polymer PDVT-10 containing long-chain side groups can reach a maximum of 8.2 cm2 / V? S, which is the highest value of the currently reported solution processing polymer field effect transistor devices. The researchers used grazing X-ray diffraction (GIXRD) to study the stacking structure of the polymer, and analyzed the stacking morphology of the polymer PDVT-8 and PDVT-10 films. The distance dd of the alkyl chain of the two polymers is 19.44? And 21.11 ?, and the π-π distance between the main chains is 3.72? And 3.66 ?. This relatively small dd and π-π stacking interval are very conducive to carrier transport. The successful preparation of flexible organic field effect transistors and inverters shows that these materials have important potential application value in low-cost, large-area processing organic electronics. The corresponding results were published in the international magazine Adv. Mater. (2012, 24, 4618–4622) and were selected as the current cover (Figure 2). In addition, the researchers also synthesized a bifunctional polymer semiconductor material containing benzocarbazole units, which has both good field effect transistor performance and excellent photovoltaic performance. The research results are published in the form of a bottom cover (Figure 3) in the near future J. Mater. Chem., (2012, 22, 3696).