A5046599766- Conducting polymers and applications
- Organic Electronics and Photovoltaics
- Advanced Sensor and Energy Harvesting Materials
- Analytical Chemistry and Sensors
- Advanced Memory and Neural Computing
- Electrochemical sensors and biosensors
- Neuroscience and Neural Engineering
- Molecular Junctions and Nanostructures
- Polydiacetylene-based materials and applications
- Semiconductor materials and devices
- Luminescence and Fluorescent Materials
- Electrochemical Analysis and Applications
- Thin-Film Transistor Technologies
- Quantum Dots Synthesis And Properties
- Advanced battery technologies research
- Lignin and Wood Chemistry
- Synthesis and properties of polymers
- Insect and Arachnid Ecology and Behavior
- Semiconductor materials and interfaces
- Perovskite Materials and Applications
- Nanowire Synthesis and Applications
- Advanced Materials and Mechanics
- Sensor Technology and Measurement Systems
- Silk-based biomaterials and applications
- Microplastics and Plastic Pollution
Johannes Kepler University of Linz
2012-2025
Joanneum Research
2012-2023
NanoTecCenter Weiz Forschungsgesellschaft (Austria)
2018
University of Bucharest
2012
Auburn University
2005-2006
We live in a world where the lifetime of electronics is becoming shorter, now approaching an average several months. This poses growing ecological problem. brief review will present some initial steps taken to address issue electronic waste with biodegradable organic materials. Many materials have been shown be biodegradable, safe, and nontoxic, including compounds natural origin. Additionally, unique features such suggest they useful biofunctional electronics; demonstrating functions that...
Millenniums-old natural dye indigo - a “new” ambipolar organic semiconductor. Indigo shows balanced electron and hole mobilities of 1 × 10−2 cm2 V−1 s−1 good stability against degradation in air. Inverters with gains 105 the first 110 third quadrant are demonstrated. Fabricated entirely from biodegradable compounds, these devices show large potential such materials for green electronics. Detailed facts importance to specialist readers published as ”Supporting Information”. Such documents...
Abstract Biocompatible‐ingestible electronic circuits and capsules for medical diagnosis monitoring are currently based on traditional silicon technology. Organic electronics has huge potential developing biodegradable, biocompatible, bioresorbable, or even metabolizable products. An ideal pathway such devices involves fabrication with materials from nature, found in common commodity Transistors an operational voltage as low 4–5 V, a source drain current of up to 0.5 μA on‐off ratio 3–5...
Hydrogen-bonding (H-bonding) is a relatively strong, highly directional, and specific noncovalent interaction present in many organic molecules, notably responsible for supramolecular ordering biological systems. The H-bonding interactions play role electrically conducting materials – particular those related to biology, e.g. melanin indigo. This article aims highlight recent work on application of nature-inspired H-bonded molecules electronic devices. Three topics are covered this brief...
Extensive intramolecular π-conjugation is considered to be requisite in the design of organic semiconductors. Here, two inkjet pigments, epindolidione and quinacridone, that break this rule are explored. These molecules afford intermolecular π-stacking reinforced by hydrogen-bonding bridges. Air-stable field effect transistors reported support mobilities up 1.5 cm2/Vs with T80 lifetimes comparable most stable semiconducting materials.
"Exotic" materials have become the focus of recent developments in organic electronics that envision biocompatibility, biodegradability, and sustainability for low-cost, large-volume electronic components. In this brief review, we discuss firstly use paper, leather, silk, hard gelatine, bio-degradable plastics as substrates devices, secondly smoothing agents, such polydimethylsiloxane aurin. Thirdly, describe DNA nucleobases examples exotic dielectrics with low dielectric losses leakage...
Abstract We describe the history of indigo dye and its derivative Tyrian purple, from their roles in ancient world to recent research showing semiconducting properties indigoids. Indigoids are natural dyes that have been produced for centuries, is currently most worldwide. Herein we review these materials, chemistry physical properties, characteristics solid state. Due hydrogen bonding π‐stacking, purple form highly‐ordered crystalline thin films. Such films used fabricate high‐performance...
The surface passivation by organic ligands of differently composed cesium lead halide perovskite nanocrystals was explored.
Biocompatible and sustainable electronic-grade materials are integral for the development of electronics biointegration 'use-and-throw' applications. Herein we report use natural resin shellac in organic field-effect transistors. Shellac was employed to cast robust smooth substrates suitable durable transistor devices. In addition displays excellent insulating properties enabling its as a high-quality dielectric layer (OFET) We demonstrate that two common semiconductors, pentacene C60, show...
Quinacridone is a five-ring hydrogen-bonded molecule analogous in structure and size to the well-known organic semiconductor pentacene. Unlike pentacene, quinacridone has limited intramolecular π-conjugation becomes highly colored solid state due strong intermolecular electronic coupling. We found that shows field-effect mobility of 0.1 cm2/V·s, comparable mobilities pentacene similarly prepared devices. Photoinduced charge generation single-layer metal-insulator-metal diodes more than...
Ionic impurities in gate dielectrics are outlined as a possible source for threshold voltage shifts organic field effect transistors. Using poly(vinyl alcohol) containing sodium acetate we show how transistors can be designed memory elements or polymer integrated circuits.
Ambipolar organic semiconductors enable complementary-like circuits in electronics. Here we show promising electron and hole transport properties the natural pigment Tyrian Purple (6,6’-dibromoindigo). X-ray diffraction of films reveals a highly-ordered structure with single preferential orientation, attributed to intermolecular hydrogen bonding. This material, band gap ∼1.8 eV, demonstrates high mobilities 0.22 cm2/V·s 0.03 transistors, respectively; air-stable operation. Inverters gains...
An ultra-thin natural-source-based cellulose derivate is used in a bilayer gate dielectric for organic complementary inverters. Extraordinarily high small-signal gains up to 1600, very sharp transition region (as low as 40 mV), full rail-to-rail swing, balanced noise margin of 92.5%, and “long-time” stability are shown, revealing that these inverters highly suitable complex circuit designs. For more than decade now the research electronics was driven by unique consumer markets demanding...
We report on the natural source based and biodegradable material cellulose Al2O3 as ultrathin hybrid high-k dielectric layer for applications in green electronics. Dielectric films of 16 nm (ε ≈ 8.4) 8 9) exhibit low leakage currents up to electric fields 1.5 MV/cm. Pentacene C60 organic thin film transistors show a well-balanced performance with operation voltages around 2 V. They are implemented complementary inverters excellent switching behavior, small-signal gain 60 exceptionally high...
We report on the fabrication and performance of vacuum-processed organic field effect transistors utilizing evaporated low-density polyethylene (LD-PE) as a dielectric layer. With C60 semiconductor, we demonstrate low operating voltage with mobilities in excess 4 cm2/Vs. Devices pentacene showed mobility 0.16 using tyrian Purple semiconductor show low-voltage ambipolar operation equal electron hole ∼0.3 These devices hysteresis operational stability over at least several months....
Anthraquinone (AQ) has long been identified as a highly promising lead structure for various applications in organic electronics. Considering the enormous number of possible substitution patterns AQ structure, with only minority being commercially available, systematic experimental screening associated electrochemical potentials represents challenging and time consuming task, which can be greatly enhanced
Herein we report our recent efforts in employing natural materials and synthetic derivatives of molecules for organic field effect transistors (OFETs) photovoltaics (OPVs). We evaluated dyes from the following chemical families: acridones, anthraquinones, carotenoids, indigoids. These have proven effective transistors, with mobilities 4 × 10<sup>-4</sup> - 0.2 cm<sup>2</sup>/V-s range, indigoids showing promising ambipolar behavior. fabricated complementary-like voltage inverters high...
Effects of purification were studied in organic field effect transistors. The results presented here indicate that the purity semiconductors is a key parameter to achieve high performance for
Sepia melanin, a biopigment extracted from the ink sac of cuttlefish, is relevant to sustainable organic electronics. In this work, we flexographically print films an melanin including shellac as bio-sourced binder on silver electrode-patterned paper. We examine electrical response in high humidity and ambient conditions (here electronic conductivity 10−4 S/cm). Additionally, study biodegradation printed their individual constituents based mineralization into CO2 under composting conditions....