A5068009125- Conducting polymers and applications
- Organic Electronics and Photovoltaics
- Advanced Sensor and Energy Harvesting Materials
- Advanced Memory and Neural Computing
- Thin-Film Transistor Technologies
- Organic Light-Emitting Diodes Research
- Semiconductor materials and devices
- Perovskite Materials and Applications
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Tactile and Sensory Interactions
- Analytical Chemistry and Sensors
- Supercapacitor Materials and Fabrication
- Synthesis and properties of polymers
- Advanced Battery Materials and Technologies
- Advancements in Battery Materials
- Dielectric materials and actuators
- Molecular Junctions and Nanostructures
- Zeolite Catalysis and Synthesis
- Crystallography and molecular interactions
- Electrospun Nanofibers in Biomedical Applications
- Luminescence and Fluorescent Materials
- Mesoporous Materials and Catalysis
- Nanomaterials and Printing Technologies
- Neuroscience and Neural Engineering
National Taipei University of Technology
2016-2025
National Chengchi University
2023-2025
Ming Chi University of Technology
2019-2024
Stanford University
2010-2022
Taipei Veterans General Hospital
2021-2022
National Yang Ming Chiao Tung University
2021-2022
National Taiwan University
2006-2015
Stanford Medicine
2014
The University of Texas at Austin
2013
The University of Texas Health Science Center at Houston
2012
Understanding crystal polymorphism is a long-standing challenge relevant to many fields, such as pharmaceuticals, organic semiconductors, pigments, food, and explosives. Controlling of semiconductors (OSCs) in thin films particularly important given that form the active layer most electronics devices dramatic changes electronic properties can be induced even by small molecular packing. However, there are very few polymorphic OSCs for which structure-property relationships have been...
Abstract Core‐chlorinated naphthalene tetracarboxylic diimides (NDIs) with fluoroalkyl chains are synthesized and employed for n‐channel organic thin‐film transistors (OTFTs). Structural analyses of the single crystals thin films performed their charge‐transport behavior is investigated in terms structure–property relationships. NDIs two chlorine substituents shown to exhibit a herringbone structure very close π‐plane distance (3.3–3.4 Å), large π‐stack overlap (slipping angle ca. 62°), high...
A series of bulky end-capped [1]benzothieno[3,2-b]benzothiophenes (BTBTs) are developed in order to tune the packing structure via terminal substitution. coupled theoretical and experimental study allows us identify 2,7-di-tert-butylBTBT as a new high-performance organic semiconductor with large well-balanced transfer integrals, evidenced by quantum-chemical calculations. Single-crystal field-effect transistors show remarkable average saturation mobility 7.1 cm2 V−1 s−1.
A molecular nano‐floating gate (NFG) of pentacene‐based transistor memory devices is developed using conjugated polymer nanoparticles (CPN) as the discrete trapping sites embedded in an insulating polymer, poly (methacrylic acid) (PMAA). The polyfluorene (PF) and poly(fluorene‐alt‐benzo[2,1,3]thiadiazole (PFBT) with average diameters around 50–70 nm are used charge‐trapping sites, while hydrophilic PMAA serves a matrix tunneling layer. By inserting PF floating gate, device reveals...
New donor–acceptor conjugated copolymer, PSeDPP, consisting of selenophene (Se) and 3,6-dithiophen-2-yl-2,5-dialkylpyrrolo[3,4-c]pyrrole-1,4-dione (DPP), was developed for high performance ambipolar field-effect transistors (FETs) nonvolatile memory applications. The maximum absorption peak optical band gap PSeDPP thin film were observed at 849 nm 1.29 eV, respectively, indicating the strong intramolecular intermolecular charge transfer. polymer crystallinity FET mobility significantly...
Developing organic photovoltaic systems that possess high efficiency, reproducibility, and low cost remains a topic of keen investigation. From molecular design perspective, developing "multicomponent" copolymerization synthetic approach could potentially afford macromolecular materials encompassing all the aforementioned desired parameters. Herein, we describe synthesis series poly(isoindigo-dithiophene)-based conjugated polymers with varying amounts weight polystyrene (PS) side chains (Mn...
The synthesis and characterization of a fused thiophene-diketopyrrolopyrrole based semiconducting polymer PTDPPTFT4 is presented. A number synthetic challenges have been overcome in the development practical scalable synthesis. Characterization by Gel Permeation Chromatography (GPC) over range temperatures has revealed tendency this to aggregate even at elevated confirmed that molecular weight values obtained are for nonaggregated material. This meets important requirements potential...
Over the past decades, demand for organic memory has rapidly increased due to development of flexible electronics.
Organic stretchable electronics have attracted extensive scientific and industrial interest because they can be stretched, twisted, or compressed, enabling the next-generation of organic for human/machine interfaces. These electronic devices already been described applications such as field-effect transistors, photovoltaics, light-emitting diodes, sensors. High-performance electronics, however, currently still involve complicated processing steps to integrate substrates, semiconductors,...
The design of polymer semiconductors possessing high charge transport performance, coupled with good ductility, remains a challenge. Understanding the distribution and behavior both crystalline domains amorphous regions in conjugated films, upon an applied stress, shall provide general guiding principles to stretchable organic semiconductors. Structure–property relationships (especially side chain backbone engineering) are investigated for series poly(tetrathienoacene‐diketopyrrolopyrrole)...
A stretchable and mechanical robust field-effect transistor is essential for soft wearable electronics. To realize transistors, elastic dielectrics with small current hysteresis, high elasticity, dielectric constants are the critical factor low-voltage-driven devices. Here, we demonstrate polar elastomer consisting of poly(vinylidene fluoride-hexafluoropropylene) (PVDF-HFP):poly(4-vinylphenol) (PVP). Owing to constant PVDF-HFP, device can be operated under less than 5 V shows a linear-regime...
Polymers with an abundant amorphous domain should facilitate energy dissipation upon stretching, making near π-conjugated polymers have immense potential in realizing intrinsically stretchable field-effect transistor (FET) devices. In this study, high mobility preservation under the stretched state is attempted by replacing typical alkyl-monothienyl (T-R) on a benzo[1,2-b:4,5-b']dithiophene-difluorobenzothiadiazole backbone three other biaxially extended side-chains, including...
Wearable skin-inspired electronic skins present remarkable outgrowth in recent years because their promising comfort device integration, lightweight, and mechanically robust durable characteristics led to significant progresses wearable sensors optoelectronics. devices demand real-time applicability factors such as complex fabrication steps, manufacturing cost, reliable performances, severely limiting the utilization. Herein, we nominate a scalable solution-processable electrospun patterned...
Abstract Triboelectric nanogenerators (TENGs) have become reliable green energy harvesters by converting biomechanical motions into electricity. However, the inevitable charge leakage and poor electric field (EF) of conventional TENG result in inferior tribo‐charge density on active layer. In this paper, TiO 2 ‐MXene incorporated polystyrene (PS) nanofiber membrane (PTMx NFM) trapping interlayer is introduced single electrode mode (S‐TENG) to prevent electron loss at interface. Surprisingly,...
We report the synthesis, optoelectronic properties, and electrical switching memory characteristics of three new donor–acceptor oligoimides consisting electron-donating moieties (triphenylamine or carbazole) electron-withdrawing phthalimide moieties. The influence different donor (D)–acceptor (A) arrangements, including D-A-D A-D-A structures, on properties was explored. Devices based revealed a reversible nonvolatile negative-differential-resistance (NDR) characteristic excellent stability...
We report the synthesis, properties, and optoelectronic device applications of two-dimensional (2D) like conjugated copolymers, P4TBT, P4TDTBT, P4TDTQ, P4TDPP, consisting 2′,5′′-bis(trimethystannyl)-5,5′′′-di-(2-ethylhexyl)[2,3′;5′,2′′;4′′,2′′′]quarterthiophene (4T) with following four acceptors 4,7-dibromo-2,1,3-benzothiodiazole (BT), 4,7-di-2-thienyl-2,1,3-benzothiadiazole (DTBT), 2,3-bis(4-(2-ethylhexyloxy)phenyl)-5,8-bis[5′-bromodithien-2-ylquinoxalines] (DTQ),...
We report a low-temperature processed, hydroxyl-free poly(vinyl phenyl) (PVP) dielectric layer cross-linked using thiol–ene chemistry. This new material exhibited high constant as compared to conventional polymer dielectrics, e.g. polystyrene, and allowed for cross-linking at 80 °C, which is lower than the glass transition temperature of most commonly used plastic substrates, poly(ethylene terathalate) (PET). Due absence hydroxyl groups, displayed more stable performance other previously...
Using non‐chlorinated solvents for polymer device fabrication is highly desirable to avoid the negative environmental and health effects of chlorinated solvents. Here, a mixed solvent system, composed by mixture tetrahydronaphthalene p ‐xylene, described processing high mobility donor‐acceptor fused thiophene‐diketopyrrolopyrrole copolymer (PTDPPTFT4) in thin film transistors. The use system on performance, e.g., charge transport, morphology, molecular packing, are investigated. ‐Xylene...
Abstract High charge carrier mobility solution‐processed n‐channel organic thin‐film transistors (OTFTs) based on core‐chlorinated naphthalene tetracarboxylic diimides (NDIs) with fluoroalkyl chains are demonstrated. These OTFTs were prepared through a solution shearing method. Core‐chlorination of NDIs not only increases the electron mobilities OTFTs, but also enhances their air stability, since chlorination in NDI core lowers lowest unoccupied molecular orbital (LUMO) levels. The...
We report the nonvolatile memory characteristics of pentacene-based organic field-effect transistors (OFET) using polystyrenepara-substituted with π-conjugated oligofluorenes (P(St-Fl)n (n = 1–3)) as chargeable polymer electrets. Effects fluorene conjugated length on surface structure and pentacene OFET were investigated. Among these electrets, device P(St-Fl) exhibited highest mobility 0.47 cm2 V−1 s−1 due to largest grain size growth. The P(St-Fl)3 revealed hysteresis window 76 V it having...
Stretchable electronics exhibit unique mechanical properties to expand the applications areas of conventional based on rigid wafers. Intrinsically stretchable thin film transistor is an essential component for functional electronics, which presents a great opportunity develop mechanically compliant electronic materials. Certain elastomers have been recently adopted as gate dielectrics, but their dielectric not thoroughly investigated such applications. Here, charging measurement technique...