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收集所有交通大學研究人員與學生個人或團體所發表之各項學術著作，涵蓋期刊論文、教師專書、學位論文等項。;;Collections of Publications of NCTU Researchers and Students Like Journal Papers and Thesis.

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Subject: search.filters.subject.conjugated polymers

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Now showing 1 - 10 of 45
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    Design, synthesis, photophysical, and electrochemical properties of DCM-based conjugated polymers for light-emitting devices
    (2012-09-15)
    Vanjinathan, Mahalingam
    ;
    Lin, Hong-Cheu
    ;
    Nasar, A. Sultan
    ;
    材料科學與工程學系
    ;
    Department of Materials Science and Engineering
    A series of conjugated hyperbranched polymers, hyperbranched copolymers, and linear polymers containing 2-pyran-4-ylidenemalononitrile (acceptor) and triphenylamine/fluorene (donor) units were synthesized and characterized by FTIR, 1H NMR, thermogravimetric analyses, differential scanning calorimetry, gel permeation chromatography, UVvisible, photoluminescence, and cyclic voltammetry measurements. All the polymers show red-light emission in the range of 566656 nm both in solution and in solid state. The quantum efficiency of the polymers was in the range of 5682%. Among the six polymers synthesized, only polymers containing fluorene units show Tg and polymers based on triphenylamine not exhibit Tg. The band gap of these polymers were found to be reasonably low; hyperbranched copolymer containing fluorene unit shows lowest band gap of 2.18 eV due to the stabilization of LUMO energy level by the electron withdrawing ?CN groups. The thermal and solubility behavior of the polymers were found to be good. All the EL spectra of the devices (indium-tin oxide/poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate)/polymer/2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline/tris(8-hydroxyquinoline)aluminum)/LiF/Al) show red-light emission, and the device fabricated with P3 and P4 shows maximum luminance and luminous efficiency of 4104 cd m-2 and 0.55 cd angstrom-1 and 3696 cd m-2 and 0.47 cd angstrom-1, respectively, indicates that they had the best carrier balance. (c) 2012 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem, 2012
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    Orientation Preferences of Interchain Stackings for Poly(3-hexylthiophene) Nanowires Prepared Using Template-Based Wetting Methods
    (2018-06-01)
    Jeng, Kai-Sheng
    ;
    Chu, Chien-Wei
    ;
    Liu, Chien-Liang
    ;
    Jean, Woan-Mei
    ;
    Chen, Hsin-Lung
    Poly(3-hexylthiophene) (P3HT) nanowires have drawn great attention recently because of their unique properties that can be applied to optoelectronic devices such as conjugated polymer solar cells and organic field-effect transistors. There is still an urgent need, however, to study the fabrication and characterization of P3HT nanowires with controllable morphologies and molecular orientations. In this work, feasible routes are presented to fabricate P3HT nanowires using the solution wetting template method and the solvent-annealing-induced nanowetting in template (SAINT) method. The morphologies and chemical compositions of the P3HT nanowires prepared using these two methods are confirmed by scanning electron microscopy, transmission electron microscopy (TEM), and Raman spectroscopy. From the ultraviolet-visible spectroscopy and wide-angle X-ray scattering results, it is concluded that the degrees of the crystallinity and the orientation preferences of interchain stackings along the pore axis for the P3HT nanowires prepared by the SAINT method are higher than those prepared by the solution wetting template method.
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    Confinement Effects on the Optical Properties and Chain Conformations of Poly(9,9-di-n-octylfluorene-alt-benzothiadiazole) Nanotubes
    (2016-09)
    Chu, Chien-Wei
    ;
    Jeng, Kai-Sheng
    ;
    Chi, Mu-Huan
    ;
    Tsai, Chia-Chan
    ;
    Cheng, Ming-Hsiang
    Although many fabrication methods of conjugated polymer nanostructures have been developed, the effects of confinement on the morphologies, chain conformations, and optical properties of conjugated polymers are still not well understood. In this work, poly(9,9-di-n-octylfluorene-alt-benzothiadiazole) (F8BT), a light-emitting conjugated polymer, is used to fabricate nanotubes by a solution wetting method using anodic aluminum oxide templates. The property changes under the nanoscale confinement have been investigated. The morphologies of F8BT nanostructures are characterized by scanning electron microscope, transmission electron microscope, and laser scanning confocal microscope. The data show the hollow morphologies and no or low crystallinity of the nanostructures. The optical properties are also measured using UV-vis absorption, photoluminescence, and confocal Raman spectroscopy. The spectroscopy data indicate that F8BT polymer chains have less intermolecular interactions and coplanarity under the confinement effect.
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    Conjugated Polymer/Nanocrystal Nanocomposites for Renewable Energy Applications in Photovoltaics and Photocatalysis
    (2014-11-26)
    Su, Yu-Wei
    ;
    Lin, Wei-Hao
    ;
    Hsu, Yung-Jung
    ;
    Wei, Kung-Hwa
    ;
    材料科學與工程學系
    Conjugated polymer/nanocrystal composites have attracted much attention for use in renewable energy applications because of their versatile and synergistic optical and electronic properties. Upon absorbing photons, charge separation occurs in the nanocrystals, generating electrons and holes for photocurrent flow or reduction/oxidation (redox) reactions under proper conditions. Incorporating these nanocrystals into conjugated polymers can complement the visible light absorption range of the polymers for photovoltaics applications or allow the polymers to sensitize or immobilize the nanocrystals for photocatalysis. Here, the current developments of conjugated polymer/nanocrystal nanocomposites for bulk heterojunction-type photovoltaics incorporating Cd- and Pb-based nanocrystals or quantum dots are reviewed. The effects of manipulating the organic ligands and the concentration of the nanocrystal precursor, critical factors that affect the shape and aggregation of the nanocrystals, are also discussed. In the conclusion, the mechanisms through which conjugated polymers can sensitize semiconductor nanocrystals (TiO2, ZnO) to ensure efficient charge separation, as well as how they can support immobilized nanocrystals for use in photocatalysis, are addressed.
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    Side-Chain-Bulk Effects on the Molecular Packing and Photovoltaic Performance of Benzotrithiophene-Benzooxadiazole Conjugated Copolymers
    (2015-04-27)
    Lan, Shang-Che
    ;
    Chang, Chiao-Kai
    ;
    Wang, Yi-Chien
    ;
    Wei, Kung-Hwa
    ;
    材料科學與工程學系
    Two alternating donor-acceptor conjugated polymers, PBTTBO-C13C11 and PBTTBO-C13C8, comprising 5-alkylbenzo[1,2-b:3,4-b:5,6-d]trithiophene (BTT) as the donor and 4,7-bis(4-dodecylthien-2-yl)benzo[1,2,5]oxadiazole (BO) as the acceptor, with different alkyl side-chain architectures on their BTT units are synthesized, and their bulk heterojunction photovoltaic properties when blended with the fullerene PC71BM are characterized. Even a slight change in the length of the alkyl chain of the BTT units influences the steric bulk to such a degree that it substantially affects the molecular packing of the polymers and the performance of their photovoltaic devices. The bulkier side chains of the polymer PBTTBO-C13C11 not only prevent its crystallization, but also suppress its light-absorption coefficient relative to that of PBTTBO-C13C8, as evidenced by X-ray diffraction and UV/Vis absorption studies, presumably because of weakened intermolecular interactions. Moreover, the polymer bearing bulkier side chains, PBTTBO-C13C11, is less miscible with PC71BM than PBTTBO-C13C8, and this characteristic determines the morphology of their annealed blended films, as shown by TEM studies. The best efficiency is obtained with a device containing an annealed PBTTBO-C13C8/PC71BM (1/2 w/w) active layer that was maintained at 120 degrees C for 10 min, which shows a power conversion efficiency of 6.2%, an open-circuit voltage of 0.75 V, a short-circuit current density of 12.6 mAcm(-2), and a fill factor of 66%.
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    Effects of Thermal Annealing and Solvent Annealing on the Morphologies and Properties of Poly(3-hexylthiophene) Nanowires
    (2015-01-01)
    Fu, Chuan-Min
    ;
    Jeng, Kai-Sheng
    ;
    Li, Yu-Hsun
    ;
    Hsu, Yuan-Chen
    ;
    Chi, Mu-Huan
    In recent years, poly(3-hexylthiophene) (P3HT) nanowires have attracted great interest because of their unique physical and electronic properties. The annealing effects on the properties and morphologies of P3HT nanowires, however, are still not fully understood. In this work, the effects of thermal annealing and solvent annealing on the morphologies and crystallinities of P3HT nanowires prepared by the whisker method are studied. P3HT is first dissolved in heated p-xylene, followed by a cooling process to room temperature, and P3HT nanowires are formed by self-assembly. The crystallinities of the P3HT nanowires are observed to increase by both thermal annealing and solvent annealing, as confirmed by differential scanning calorimetry and X-ray diffraction. The device performances of organic field-effect transistors based on the annealed nanowires are also examined. After annealing, an enhancement of the charge mobility by one order is observed.
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    High-Efficiency Large-Bandgap Material for Polymer Solar Cells
    (2015-01-01)
    Wei, Hedi
    ;
    Chao, Yi-Hsiang
    ;
    Kang, Chong
    ;
    Li, Cuihong
    ;
    Lu, Heng
    High-molecular-weight conjugated polymer HD-PDFC-DTBT with N-(2-hexyldecyl)-3,6-difluorocarbazole as the donor unit, 5,6-bis(octyloxy)benzothiadiazole as the acceptor unit, and thiophene as the spacer is synthesized by Suzuki polycondensation. HD-PDFC-DTBT shows a large bandgap of 1.96 eV and a high hole mobility of 0.16 cm(2) V-1 s(-1). HD-PDFC-DTBT:PC71BM-based inverted polymer solar cells (PSCs) give a power conversion efficiency (PCE) of 7.39% with a V-oc of 0.93 V, a J(sc) of 14.11 mA cm(-2), and an FF of 0.56.
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    兩岸共同合作重點項目（三）：高效率高分子太陽能電池研發-界面及元件工程
    (2011)
    許千樹
    ;
    HSU CHAIN-SHU
    ;
    國立交通大學應用化學系（所）
    本計畫最終目標是要達到9%能量轉換效率之高分子太陽能電池，計畫內容包括材 料合成、界面及元件工程。大陸方面著重於低能隙共軛高分子之合成，合成出寬吸收、 高遷移率、合適能級的具有較高太陽電池光電轉換效率的聚合物材料，內容包括(1)“給 體-π-受體＂型含芴單元的共軛聚合物的合成 (2)“給體-π-受體＂型含喹喔啉類共軛聚 合物的合成 (3) 給體-π-受體＂型含菲啶共軛聚合物的合成 (4)“給體-π-受體＂型含有 醯亞胺單體的共軛聚合物。本研究團隊負責界面及元件工程，界面工程方面包括引進主 動層/電極間緩衝層，以及添加金奈米粒子誘導表面電漿共振，以增加光吸收等，元件工 程方面包括設計及製備(1)正型結構有機太陽能電池(2)負型結構有機太陽能電池(3)多層 串疊型有機太陽能電池，以各式的製程條件來達到元件的優化及長期穩定性。
  • Thumbnail Image
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    兩岸共同合作重點項目（三）：高效率高分子太陽能電池研發-界面及元件工程
    (2012)
    許千樹
    ;
    HSU CHAIN-SHU
    ;
    國立交通大學應用化學系（所）
    本計畫最終目標是要達到9%能量轉換效率之高分子太陽能電池，計畫內容包括材 料合成、界面及元件工程。大陸方面著重於低能隙共軛高分子之合成，合成出寬吸收、 高遷移率、合適能級的具有較高太陽電池光電轉換效率的聚合物材料，內容包括(1)“給 體-π-受體＂型含芴單元的共軛聚合物的合成 (2)“給體-π-受體＂型含喹喔啉類共軛聚 合物的合成 (3) 給體-π-受體＂型含菲啶共軛聚合物的合成 (4)“給體-π-受體＂型含有 醯亞胺單體的共軛聚合物。本研究團隊負責界面及元件工程，界面工程方面包括引進主 動層/電極間緩衝層，以及添加金奈米粒子誘導表面電漿共振，以增加光吸收等，元件工 程方面包括設計及製備(1)正型結構有機太陽能電池(2)負型結構有機太陽能電池(3)多層 串疊型有機太陽能電池，以各式的製程條件來達到元件的優化及長期穩定性。