25834-16-6Relevant articles and documents
Effect of polymer chain conformation on field-effect transistor performance: Synthesis and properties of two arylene imide based D-A copolymers
Chen, Dugang,Zhao, Yan,Zhong, Cheng,Gao, Siqi,Yu, Gui,Liu, Yunqi,Qin, Jingui
, p. 14639 - 14644 (2012)
Two donor-acceptor (D-A) alternating copolymers (P1 and P2) with phthalimide or thieno[3,4-c]pyrrole-4,6-dione as the electron acceptor and bithiophene as the electron donor have been synthesized by Stille polycondensation. Both polymers showed good thermal stability and a low HOMO level. Organic field-effect transistor (OFET) devices with common architectures were fabricated to evaluate and compare the FET properties of the two polymers. Though P2 exhibits better coplanarity than P1, the FET results revealed that both the hole mobility and current on-off ratio of P1 are more than one order of magnitude higher than P2. Theoretical calculations and AFM were conducted to analyze the reason for this very interesting result, and it was found that polymer chain conformation is another important factor (in addition to coplanarity) for polymers to obtain high FET performance.
Aromatic amine compound containing structure of tetramethyl isoindoline or oxide thereof, and preparation method of same
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Paragraph 0039; 0040; 0041; 0042, (2018/06/26)
The invention provides an aromatic amine compound containing structure of tetramethyl isoindoline or an oxide thereof, and a preparation method of same. The aromatic amine compound containing the tetramethyl isoindoline oxide structure is 4,7-bis(4-aminophenyl)-1,1,3,3-tetramethyl isoindoline oxide which is represented as the chemical formula (III), and the aromatic amine compound containing the tetramethyl isoindoline structure is 4,7-bis(4-aminophenyl)-1,1,3,3-tetramethyl isoindoline which is represented as the chemical formula (IV). The aromatic amine compound containing the structure of the tetramethyl isoindoline or the oxide thereof can be an important precursor for synthesis of organic porous covalent framework materials.
Optimal ambipolar charge transport of thienylenevinylene-based polymer semiconductors by changes in conformation for high-performance organic thin film transistors and inverters
Kim, Juhwan,Baeg, Kang-Jun,Khim, Dongyoon,James, David T.,Kim, Ji-Seon,Lim, Bogyu,Yun, Jin-Mun,Jeong, Hyung-Gu,Amegadze, Paul S. K.,Noh, Yong-Young,Kim, Dong-Yu
, p. 1572 - 1583 (2013/07/28)
We report the synthesis and characterization of thienylenevinylene-based donor-acceptor alternating copolymers (PTVPhI-Eh and PTVPhI-C12) as highly efficient ambipolar semiconductors in a thin film transistor. These polymers exhibit significantly improved hole and electron mobilities after thermal annealing. To determine the relationship between ambipolar charge transport and thermal annealing, we investigated these polymers using various analyses such as optical spectroscopy, Raman spectroscopy, computational quantum chemical calculation, X-ray diffraction, atomic force microscopy, and ambipolar charge mobility measurements. In pristine films, the polymer chains exhibited weak intra- and interchain ordering. However, when samples were annealed at sufficiently high temperatures, they exhibited a more ordered intra- and interchain conformation. As a result, we found a strong relationship between intra- and interchain conformational changes of the polymers and corresponding ambipolar charge transport properties during thermal annealing processes. Finally, we demonstrate complementary-like ambipolar inverters using a PTVPhI-Eh polymer. The largely shifted inverting voltage was improved for the thermally annealed inverters, which exhibited large voltage gains (~40).