Spectroscopy and theory shed light on excitons in semiconductors

Research team make extremely fast, precise images for first time

21-Mar-2024 - From solar panels on our roofs to the new OLED TV screens, many everyday electronic devices simply wouldn’t work without the interaction between light and the materials that make up semiconductors. A new category of semiconductors is based on organic molecules, which largely consist of carbon, ...

Building blocks of the future for photovoltaics

Research team observes formation of "dark" moiré interlayer excitons for the first time

19-Aug-2022 - An international research team led by the University of Göttingen has, for the first time, observed the build-up of a physical phenomenon that plays a role in the conversion of sunlight into electrical energy in 2D materials. The scientists succeeded in making quasiparticles – known as dark Moiré ...

The structure of the smallest semiconductor was elucidated

The smallest semiconductor composed of only 27 atoms, the Cd14Se13 cluster, has an interesting core-cage structure

05-Aug-2022 - A semiconductor is a material whose conductivity lies somewhere between that of a conductor and an insulator. This property allows semiconductors to serve as the base material for modern electronics and transistors. It is no understatement that the technological progress in the latter part of the ...

Smoke Detector “Sniffs out” Causes of Fire

Alarm Before There Is Even a Fire

13-Jul-2022 - INNOspace Masters is an annual ideas competition that showcases new ideas for space and earth applications. A team from ZARM and IWT at the University of Bremen, in collaboration with the Institute for Physical and Theoretical Chemistry at the University of Tübingen, has now won the DLR Design ...

Surprising semiconductor properties revealed with innovative new method

Discovery reveals role of oxygen impurities in semiconductor properties

11-Mar-2022 - A research team probing the properties of a semiconductor combined with a novel thin oxide film have observed a surprising new source of conductivity from oxygen atoms trapped inside. Scott Chambers, a materials scientist at the Department of Energy’s Pacific Northwest National Laboratory, ...

Predicting solar cell performance from terahertz and microwave spectroscopy

Reliably determine the mobility and lifetime of the charge carriers in new semiconducting materials

08-Mar-2022 - Many semiconducting materials are possible candidates for solar cells. In recent years, perovskite semiconductors in particular have attracted attention, as they are both inexpensive and easy to process and enable high efficiencies. Now a study with 15 participating research institutions shows ...

An electronic rainbow – perovskite spectrometer by inkjet printing

04-Jan-2022 - Researchers from Innovation Lab HySPRINT at Helmholtz-Zentrum Berlin (HZB) and Humboldt Universität zu Berlin (HU) have used an advanced inkjet printing technique to produce a large range of photodetector devices based on a hybrid perovskite semiconductor. By mixing of only three inks, the ...

A sharper look at the interior of semiconductors

A research team is developing a high-resolution imaging technique that can be used to determine internal structures in materials and their chemical composition in a non-destructive manner and with nanometre precision

19-Feb-2021 - Images provide information – what we can observe with our own eyes enables us to understand. Constantly expanding the field of perception into dimensions that are initially hidden from the naked eye, drives science forward. Today, increasingly powerful microscopes let us see into the cells and ...

X-rays show birth of semiconductor for blue LEDs

Gallium nitride is the second most important semiconductor material after silicon

28-Feb-2020 - Using a special pressure furnace, an international team of researchers has analysed the initial stages of the growth of the semiconductor gallium nitride with X-ray light. The observations show for the first time the atomic structure of the interface of the semiconductor material with liquid ...

Measurement of semiconductor material quality is now 100,000 times more sensitive

11-Apr-2019 - The enhanced power of the new measuring technique to characterize materials at scales much smaller than any current technologies will accelerate the discovery and investigation of 2D, micro- and nanoscale materials. Being able to accurately measure semiconductor properties of materials in small ...