Lehrstuhl EP2 Uni Bayreuth🔒 SSL Verified

Table of Contents

• ↓ Research News
• ↓ Weiterführende Links
• ↓ Top Alternatives to ep2-bayreuth.de

6-Month Traffic Trend Estimate

Official Contact & Profiles

Visual representation extracted from ep2-bayreuth.de

Content Snippets from ep2-bayreuth.de

"Our research is concerned with the optical and electronic processes that take place in organic semiconductors. In contrast to most inorganic semiconductors, organic materials can be processed easily, either by thermal evaporation or by from solution. This opens up new, highly promising manufacturing routes for the low-cost production of opto-electronic devices such as light-emitting displays (LEDs), solar cells and transistors."

"In order to advance organic devices it is imperative to understand very clearly how excited states or charges are generated, and what determines their energy and extent, how they migrate through the semiconductor, and how they decay."

"When addressing these issues we focus in particular on the relationship between electronic, chemical and morphological structure. We therefore use a range of time-resolved spectroscopic techniques in combination with electrical and structural studies."

"A reported giant electrostrictive effect in halide perovskites has attracted interest for its physical origin and for potential applications in actuation and sensing. However, despite the reported exceptionally large magnitude of the effect, systematic experimental investigation remains limited. In this work, the electromechanical response of methylammonium lead halide perovskites (MAPbX3; X═I, Br, Cl) in the form of powder-pressed pellets, MAPbBr3 single crystals, and MAPbI3 thin films is investigated using a high-resolution double-modulation interferometer. Reference measurements using a commercial electrostrictive polymer confirm that the setup resolves sub-nanometer electromechanical displacements. In contrast to previous reports of giant electrostrictive compression in halide perovskites, no such intrinsic compressive electrostriction is observed in any of the samples. Instead, an expansion at twice the driving frequency is detected. Analysis of the frequency dependence and step response indicates that the expansion arises primarily from thermal expansion caused by Ohmic currents that lead to Joule heating."

Key Topics & Focus Areas for ep2-bayreuth.de:

Research News

Weiterführende Links