Optimal Ambipolar Charge Transport of Thienylenevinylene-Based Polymer Semiconductors by Changes in Conformation for High-Performance Organic Thin Film Transistors and Inverters

被引:55
|
作者
Kim, Juhwan [1 ]
Baeg, Kang-Jun [4 ]
Khim, Dongyoon [1 ]
James, David T. [5 ,6 ]
Kim, Ji-Seon [5 ,6 ]
Lim, Bogyu [7 ]
Yun, Jin-Mun [1 ]
Jeong, Hyung-Gu [1 ]
Amegadze, Paul S. K. [3 ]
Noh, Yong-Young [3 ]
Kim, Dong-Yu [1 ,2 ]
机构
[1] Gwangju Inst Sci & Technol, Sch Mat Sci & Engn, Kwangju 500712, South Korea
[2] Gwangju Inst Sci & Technol, Dept Nanobio Mat & Elect, Kwangju 500712, South Korea
[3] Dongguk Univ, Dept Energy & Mat Engn, Seoul 100715, South Korea
[4] KERI, Nano Carbon Mat Res Grp, Chang Won 642120, Gyeongsangnam D, South Korea
[5] Univ London Imperial Coll Sci Technol & Med, Dept Phys, London SW7 2AZ, England
[6] Univ London Imperial Coll Sci Technol & Med, Ctr Plast Elect, London SW7 2AZ, England
[7] Stanford Univ, Dept Mat Sci & Engn, Stanford, CA 94305 USA
基金
新加坡国家研究基金会;
关键词
ambipolar polymer; charge transport; OTFTs; thienylenevinylene; polymer conformation; FIELD-EFFECT TRANSISTORS; MOBILITY; COPOLYMERS; DIKETOPYRROLOPYRROLE; VINYLENE; INJECTION; OLIGOMERS; DESIGN;
D O I
10.1021/cm303908f
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
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 (similar to 40).
引用
收藏
页码:1572 / 1583
页数:12
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