Polaron Spin Current Transport in Organic Semiconductors
نویسندگان
چکیده
Shun Watanabe∗,1 Kazuya Ando∗ †,2, 3, 4 Keehoon Kang, Sebastian Mooser, Yana Vaynzof, Hidekazu Kurebayashi, 4 Eiji Saitoh, 5, 6, 7 and Henning Sirringhaus‡1 Cavendish Laboratory, University of Cambridge, J. J. Thomson Avenue, Cambridge CB3 0HE, United Kingdom Department of Applied Physics and Physico-Informatics, Keio University, Yokohama 223-8522, Japan Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan PRESTO, Japan Science and Technology Agency, Sanbancho, Tokyo 102-0075, Japan WPI Advanced Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan CREST, Japan Science and Technology Agency, Sanbancho, Tokyo 102-0075, Japan The Advanced Science Research Center, Japan Atomic Energy Agency, Tokai 319-1195, Japan
منابع مشابه
Frequency and time domain studies of magneto-transport and charge trapping in amorphous organic semiconductors
The focus of this thesis is a recently discovered organic magnetoresistance (OMAR) whose underlying mechanism remains much debated. As an introduction, the field of organic electronic is briefly discussed focusing mainly on organic light emitting diodes, the devices in which OMAR was first discovered. Important findings related to OMAR from prior work are highlighted. The frequency dependence o...
متن کاملSlow hopping and spin dephasing of Coulombically bound polaron pairs in an organic semiconductor at room temperature.
Polaron pairs are intermediate electronic states that are integral to the optoelectronic conversion process in organic semiconductors. Here, we report on electrically detected spin echoes arising from direct quantum control of polaron pair spins in an organic light-emitting diode at room temperature. This approach reveals phase coherence on a microsecond time scale, and offers a direct way to p...
متن کاملConductance switching, hysteresis, and magnetoresistance in organic semiconductors
The controllability of charge transport through an organic molecular spin-valve system is theoretically investigated on the basis of a Su-Schrieffer-Heeger model combined with the non-equilibrium Green’s function formalism. We show how the formation of polaron in the organic sub-structure leads to a hysteretic conductance switching, via sweeping either the bias voltage or the electrochemical po...
متن کاملA review of carrier thermoelectric-transport theory in organic semiconductors.
Carrier thermoelectric-transport theory has recently become of growing interest and numerous thermoelectric-transport models have been proposed for organic semiconductors, due to pressing current issues involving energy production and the environment. The purpose of this review is to provide a theoretical description of the thermoelectric Seebeck effect in organic semiconductors. Special attent...
متن کاملDifferentiation between polaron-pair and triplet-exciton polaron spin-dependent mechanisms in organic light-emitting diodes by coherent spin beating
Pulsed electrically detected magnetic resonance offers a unique avenue to distinguish between polaronpair (PP) and triplet-exciton polaron (TEP) spin-dependent recombination, which control the conductivity and magnetoresistivity of organic semiconductors. Which of these two fundamental processes dominates depends on carrier balance: by injecting surplus electrons we show that both processes sim...
متن کامل