Research Interests

The processing of new dye molecules either in high vacuum chambers or by solution-based deposition tools into active layers with tailored properties is the goal of our interdisciplinary research. Control over the solid-state morphology and the interfaces to electrodes and dielectric surfaces determine the performance of originating devices. The (opto-)electrical characterization of these (poly-)crystalline solid state materials within single crystal field-effect transistors (SCFETs), organic thin-film transistors (OTFTs) and organic bulk heterojunction (BHJ) solar cells enable the rationalization of structure-property relationships for the implementation in complementary logical circuits and organic photovoltaic (OPV) devices.

Methods and Techniques

OTFTs, SCFETs, OPV: BHJ/PHJ solar cells, polarization microscopy, UV/Vis/NIR, fluorescence & EOA spectroscopy, single crystal structure analysis, XRD, AFM, SEM, TEM, SAED, DFT calculation, gradient sublimation.

Key Publications

J.H. Kim, et. al, Adv. Mater. 2021, 33, 2100582, An Efficient Narrowband Near-Infrared at 1040nm Organic Photodetector Realized by Intermolecular Charge Transfer Mediated Coupling Based on a Squaraine Dye
DOI: 10.1002/adma.202100582

M. Stolte, et. al, Adv. Optical Mater. 2020, 8, 2000926, Crystal Engineering of 1D Exciton Systems Composed of Single- and Double-Stranded Perylene Bisimide J-Aggregates
DOI: 10.1002/adom.202000926

M. Hecht, et. al, Angew. Chem. Int. Ed. 2019, 58, 12979-12983, Photoconductive Core–Shell Liquid‐Crystals of a Perylene Bisimide J‐Aggregate Donor–Acceptor Dyad
DOI: 10.1002/anie.201904789

T. Hao, et. al, Adv. Mater. 2018, 30, 1804032, Impact of 2-Ethylhexyl Stereoisomers on the Electrical Performance of Single-Crystal Field-Effect Transistors
DOI: 10.1002/adma.201804032

A. Liess, et. al,  Nano Lett. 2017, 17, 1719-1726, Exciton Coupling of Merocyanine Dyes from H- to J‑type in the Solid State by Crystal Engineering.
DOI: 10.1021/acs.nanolett.6b0499

M. Stolte, et. al, Adv. Funct. Mater. 2016, 26, 7415–7422, Diketopyrrolopyrrole Organic Thin-Film Transistors: Impact of Alkyl Substituents and Tolerance of Ethylhexyl Stereoisomers.      
DOI: 10.1002/adfm.201602994

CV of Dr. Matthias Stolte

since 2010Senior Research Associate, Institute of Organic Chemistry & Center for Nanosystems Chemistry, University of Würzburg
2008-2010

Postdoctoral Research Associate, Institute of Organic Chemistry, University of Würzburg

2008Dr. rer. nat. (Physical Chemistry), University of Kaiserslautern

Background and Motivation

The continuously emerging and improving opto-electronic devices like mobile phones, displays and solar cells of our highly interconnected society stimulate the creativity of chemists to design new functional materials. Our research focus is on small organic molecules, which can be either processed from solution at low temperatures or in vacuum onto various substrates. We try to guide their organization from individual molecules, over their self-assembled aggregates in solution and on surfaces to solid-state. Unrevealing materials structure-property relationships will enable us in this so-called bottom-up approach to create new functional materials for future applications.

Contact:

Dr. Matthias Stolte
Phone: +49 931 31-88371
Fax:      +49 931 31-883710 
matthias.stolte@uni-wuerzburg.de