Mats Fahlman

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Printed electronics are considered for wireless electronic tags and sensors within the future Internet-of-things (IoT) concept. As a consequence of the low charge carrier mobility of present printable organic and inorganic semiconductors, the operational frequency of printed rectifiers is not high enough to enable direct communication and powering between(More)
Substantial potential steps ∼ 0.5 eV are frequently observed in organic multilayers of donor and acceptor molecules. Often such potential steps depend on the order in which the individual layers are deposited, or on which substrate they are deposited. In this paper we outline a model for these potential steps, based upon integer charge transfer between(More)
  • Qinye Bao, Xianjie Liu, Slawomir Braun, Mats Fahlman, Q X Bao, S Liu +2 others
  • 2014
optical and electronic properties suitable for applications in e.g. transistors, light emitting diodes and photovoltaic cells. 1-10 All such devices contain several interfaces, metal-organic and/or organic/organic, that effect significantly performance and functionality. Much effort consequently has been invested in describing the energetics governing(More)
  • Qinye Bao, Oskar Sandberg, Daniel Dagnelund, Simon Sanden, Slawomir Braun, Harri Aarnio +17 others
  • 2014
Organic photovoltaic is under intense development and significant focus has been placed on tuning the donor ionization potential and acceptor electron affinity to optimize open circuit voltage. Here we show that for a series of regioregular-poly(3-hexylthiophene):fullerene bulk heterojunction organic photovoltaic devices with pinned electrodes, integer(More)
Amphiphilic semiconducting copolymer as compatibility layer for printing polyelectrolyte-EGOFET: Polyelectrolyte-gated organic field effect transistor. Abstract We report a method for inkjet-printing an organic semiconductor layer on top of the electrolyte insulator layer in polyelectrolyte-gated OFETs by using a surface modification treatment to overcome(More)
  • Slawomir Braun, Xianjie Liu, William R Salaneck, Mats Fahlman, Fermi Level, S Braun +3 others
  • 2010
Organic hetero-junctions in a multi-layered thin film stacks comprising alternate layers of the molecular donor-tetrathiafulvalene (TTF) and the acceptor-tetracyanoquinodimethane (TCNQ), have been studied by Ultraviolet Photoelectron Spectroscopy (UPS). We show that the energy level alignment at the organic-organic interfaces in the stacks depends only upon(More)
A mixed ionic-electronic conductor based on nanofibrillated cellulose composited with poly(3,4-ethylene-dioxythio-phene):-poly(styrene-sulfonate) along with high boiling point solvents is demonstrated in bulky electrochemical devices. The high electronic and ionic conductivities of the resulting nanopaper are exploited in devices which exhibit record values(More)