Organophotonic Sensing @ KSI Meinsberg
WELCOME TO GIEDRIUS PUIDOKAS
09 February 2023
Giedrius has a Bachelor’s degree in light engineering from the faculty of physics at Vilnius University, Lithuania. Having already done comprehensive research on improvement of OLED lifetime during his Bachelor studies, he now joined the group for a 6-month-long internship on organic photodiodes under the Erasmus+ scheme.
Welcome to our group!
IGSTC WISER AWARD GRANTED
09 January 2023
Congratulations to Dr. Rajamalli Pachai Gounder from IISc Bangalore for having been awarded an IGSTC Women Involvement in Science and Engineering Research (WISER) grant. The Indo-German collaboration on the project “Design and synthesis of multi-resonance thermally activated delayed fluorescence emitter for optogenetics and imaging applications” will involve several visits of Dr. Rajamalli to KSI Meinsberg, where we will implement newly developed fluorophores in OLEDs for optogenetics and fluorescence imaging applications. We are excited about this collaboration and looking forward to hosting Dr. Rajamalli!
PHD POSITION AVAILABLE
02 September 2022
For our BMBF-funded NanoMatFutur-project, we are looking for a PhD student with background in semiconductor physics, organic chemistry, and optics to develop with us next-generation OLEDs for neuroscience sensors. Read more about the position in the advert linked below:
https://www.ksi-meinsberg.de/stellenangebote
Application deadline: 30 September 2022
WELCOME TO OUR NEW PHD STUDENT NIRBHIKA NANDAKUMAR
02 August 2022
Nirbhika obtained a master's degree in organic and molecular electronics from Technische Universität Dresden. She joined our group in July 2022 and takes part in the RTG2767. Her research will focus on new transparent metal electrodes for flexible OLEDs.
Welcome to our group!
VISIT BY THE RTG2767 AT KSI MEINSBERG
12 July 2022
On June 28th, KSI Meinsberg was visited by the PhD students of the DFG-funded RTG2767. Caroline, who is PI in the RTG, hold a lecture on "Dynamical methods in biosensing - organic electronics", followed by a lab tour through the institute.
WELCOME TO VISITING STUDENT BOHDAN KULYK
21 June 2022
Bohdan is a PhD student in Nanosciences and Nanotechnology at i3N, University of Aveiro, Portugal. His research focusses on graphene on paper for flexible devices such as physical and biochemical sensors and OLEDs. He visits our group for two weeks to explore flexible polymer substrates for graphene electrodes.
Welcome and good luck with your experiments!
WELCOME TO OUR NEW POSTDOC JENS WEBER
16 May 2022
Jens started his journey with a PhD degree at the Max-Planck-Institute for biophysical chemistry in 2010 in Neuroscience and Biophysics tackling principles in synaptic transmission. Later on he was a research fellow at the CNCR in Amsterdam, the Institute of Experimental Medicine in Budapest and the Ruhr-University in Bochum. With his strong neuroscience background, he will greatly support our research in developing new technologies for optical stimulation and sensing of neuronal activity.
Welcome to our group!
MEET THE GROUP AT OPTOGEN CONFERENCE OR SID DISPLAY WEEK
05 May 2022
Back to in-person conferences! Next week, you have two chances to meet the group:
Ilenia and Giuseppe will visit the Optogen conference in Paris. Ilenia will give a talk on "Spatial light patterns using smartphone optogenetics for behavioral control of Drosophila melanogaster larvae" and Giuseppe will present a poster on "Dual-color organic LEDs for optogenetic activation and inhibition of cellular activity".
If you are in the California, you can meet Caroline at SID Display Week in San José. She will hold a short course on "OLEDs: From fundamentals to applications" together with Prof. Seunghyup Yoo.
CAROLINE AT HEALTHCARE PHOTONICS EVENT
25 April 2022
Together with Alemayehu Nana Koya and Jürgen Popp, Caroline will speak on "emerging biomedical applications of OLEDs" at a virtual event on "Emerging topics in healthcare photonics: from biophotonics to translational medicine". The event is organized by Advanced Optical Materials, Advanced Photonics Research, Journal of Biophotonics, and Translational Biophotonics (Wiley journals) and will be moderated by Ventsislav Valev.
If you are interested, please join this free webinar on May 3rd, 2-3.30 pm Berlin time.
MEET CAROLINE AT SPIE PHOTONICS EUROPE
31 March 2022
We are glad to present our work at SPIE Photonics Europe conference in beautiful Strasbourg next week. Don't miss Caroline's talk about "Bi-color organic LEDs for neuronal activation and silencing" on Monday, 4th March at 3 pm. We are looking forward to many exciting presentations and having fruitful discussions with researchers again in-person.
WELCOME TO OUR NEW POSTDOC SIDDHARTHA SAGGAR
07 February 2022
Siddhartha joined our group as postdoc in February 2022 to conduct research on organic semiconducting devices for new biomedical applications. Previously, Siddhartha pursued his Ph.D. degree at the University of Queensland, Australia, studying the fundamental electro-optical properties, charge transport and recombination in Organic Photodiodes (OPDs) - involving both experimental and theoretical sides. Welcome to our group!
WELCOME TO OUR NEW PHD STUDENT RABIUL ISLAM
07 December 2021
Rabiul Islam joined our group to pursue his PhD on organic photodiodes for fluorescence imaging. Previously, Rabiul accomplished his master degree in Materials Science from Technische Universität Darmstadt, Germany. During his master thesis, he specialized on fabrication and electrical characterization of organic neuromorphic memory devices. Welcome to our group!
NEW PUBLICATION ABOUT TAILORING ORGANIC LEDS FOR BIDIRECTIONAL OPTOGENETIC CONTROL
02 December 2021
We have published our latest research on bi-color OLEDs for optogenetics in Advanced Functional Materials. Using a tandem device structure of two stacked OLEDs, we developed blue/red- and blue/green-emitting OLEDs with strong separation of the two emission colors. The devices were applied to ND7/23-cells and Drosophila larvae for co-located stimulation and inhibition of cellular activity. For this, we made use of the novel optogenetic proteins BiPOLES and BiPOLES-ChRmine, which enable bi-directional control of ion flow through the cell membrane. Congratulations to Giuseppe, Ilenia and our collaborators at TU Dresden and Humboldt University Berlin!
POSTDOC POSITION AVAILABLE
02 December 2021
For our new BMBF-funded NanoMatFutur-project, we are looking for a postdoc with experience in patch-clamp electrophysiology and cell culturing to develop with us next-generation neuroscience sensors based on organic electronic materials. Read more about the position in the advert linked below.
Find all available positions also here: https://www.ksi-meinsberg.de/stellenangebote
Application deadline: 15 January 2022
RESEARCH TRAINING GROUP AT TU DRESDEN FUNDED WITH PARTICIPATION OF THE MURAWSKILAB
10 November 2021
The new research training group "Supracolloidal sstructures: from materials to optical and electronic devices" (GRK 2767) at TU Dresden will train a new generation of experts, who will design new materials out of supracolloidal structures and incorporate them in devices. The Kurt Schwabe Institute and the Murawskilab will participate as project partners in the area of dynamic plamonic nanostructures and organic semiconductors.
KICK-START OF NANOMATFUTUR RESEARCH GROUP
04 November 2021
We are excited to receiving 1.78 M€ funding by the German ministry of education and research (BMBF) for a NanoMatFutur research group. In the 5-year project "NeuroLichtOrgEl", we will study organic semiconducting materials and devices for optogenetic stimulation and sensing of neuronal activity. With this, we want to contribute towards developing new therapies to fight neurological diseases.
Find out more about our project in the link below (sorry, only in German).
PHD AND POSTDOC POSITIONS AVAILABLE
06 August 2021
Are you looking for a PhD or postdoctoral position? Then please get in touch! We have fully funded positions available starting Oct./Nov. 2021.
We are looking for physicists/chemists/engineers/biologists/neuroscientists to develop with us next-generation neuroscience sensors based on organic electronic materials. Read more about our positions in the adverts linked below (scroll down the pdf for English):
* PhD position – organic photodiodes
* Postdoc position – flexible organic electronics
* Postdoc position – optogenetics and fluorescence imaging
Find all available positions also here: https://www.ksi-meinsberg.de/stellenangebote
Application deadline: 15 September 2021
NEW ARTICLE WITH A META-ANALYSIS ON THE ORIGIN OF EFFICIENCY ROLL-OFF IN OLEDS
02 August 2021
Our new article entitled "Identification of the Key Parameters for Horizontal Transition Dipole Orientation in Fluorescent and TADF Organic Light-Emitting Diodes" has now been published in Advanced Materials. Besides reviewing the latest orientation findings of fluorescent and TADF molecules, we performed a meta-analysis of 203 published host-guest systems using DFT simulations to reveal the influence of material parameters such as molecular weight and linearity on orientation. Find out more in our open access article!
EMERGING BIOMEDICAL APPLICATIONS OF OLEDS
17 May 2021
Organic light-emitting diodes have found widespread application in displays for consumer electronics. However, their mechanical flexibility and ability for taking any size from microscopic to macroscopic scale make them also highly attractive for biomedical applications. We now published an article in Advanced Optical Materials reviewing applications of OLEDs in wearable medical devices, light-based therapy, and neuroscience. The paper is a birthday present for Prof Karl Leo, the pioneer of the doping technology in organic semiconductors.
CAROLINE APPOINTED AS VISITING PROFESSOR AT UNIVERSITY OF LEIPZIG
06 April 2021
During the current semester, Caroline is holding a visiting professorship (Vertretungsprofessur) at Peter Debye institute for physics of soft matter at the University of Leipzig. She is looking forward to new collaborations and excited about teaching a new module on organophotonic biophysics.
THE LIGHTEST LIGHT FOR THE FUTURE OF OPTOGENETICS
07 December 2020
We published two new papers today in Nature Communications. The first is on flexible, ultrathin and extremely durable OLEDs that survive a bath in water and physiological solutions for weeks and can even be plasma treated or immersed in organic solvents. The second paper uses microstructured OLEDs to stimulate sensory neurons in individual segments of Drosophila larvae. Check out our papers to learn more!
Press release at the University of St Andrews: https://news.st-andrews.ac.uk/archive/the-lightest-light-the-future-of-digital-displays-and-brain-science/
ACCURATE MEASUREMENT OF OLED EFFICIENCY
09 November 2020
We have contributed to the development of a simple open-source setup to precisely characterise the efficiency and light emission properties of organic LEDs and other light sources. Check out our paper that is published in Adv. Opt. Mater. to get instructions and learn more!
CONTROLLING NEURONS VIA SMARTPHONE
19 October 2020
Optogenetics allows to control cellular function with light. For this, specific genes encoding light-sensitive proteins are expressed in cells, which allows precise activation and inhibition of neurons. The fruit fly (Drosophila melanogaster) is a model organism in genetics and has contributed largely to our understanding of neuronal networks and the role that specific neurons play for behaviour. While neuronal function can be controlled precisely via optogenetics, current light sources for stimulation typically lack resolution, are bulky and expensive. We have now developed a smartphone app that transforms the smartphone display into a light source for optogenetics. Together with researchers from the University of Leipzig, we provide evidence for stimulation of Drosophila larvae using different Channelrhodopsins and addressing various sets of cells. Furthermore, by displaying spatially restricted light patterns, we constrained and guided larvae on the display. The work has been published in Scientific Reports and the smartphone app is available from our Github repository. We recommend trying it in your research and for teaching activities!
LIQUID CRYSTALLINE EMITTERS FOR ORGANIC LIGHT-EMITTING DIODES
15 June 2020
Liquid crystalline (LC) organic semiconductors are known for their self-assembling properties. Despite a number of studies that implemented LC emitters in OLEDs, key photophysical properties were missing so far. In a recent collaboration with the University of St Andrews (UK) and the University of Paderborn (Germany), we studied a columnar liquid crystalline perylene derivative and implemented it in state-of-the-art OLEDs. We found preferential horizontal orientation of the transition dipole moments, which improves OLED outcoupling efficiency. Furthermore, our developed OLEDs reached 10,000 cd/m² at only 5.7 V, which is one of the best performances of columnar LC-OLEDs so far. The work has now been published open access in Advanced Optical Materials.
MEET CAROLINE AT SPIE PHOTONICS EUROPE DIGITAL FORUM
01 April 2020
With the current cancellation of conferences due to COVID-19, SPIE decided to move the Photonics Europe Conference to a digital forum. Join us at this FREE event, which consists of pre-recorded talks during 6-10 April 2020 with the possibility for online Q&A and discussions. Caroline will present our latest developments on OLEDs used for optogenetics and Calcium imaging as well as some brand new results from Ilenia.
OPTICAL COMMUNICATION VIA ORGANIC LEDS
03 March 2020
OLEDs have typically been considered to be slow devices due to their inherently low charge carrier mobility. A collaborative work between the University of St Andrews and the University of Edinburgh with researchers from the organophotonic sensing lab have now developed OLEDs that achieve record data rates above 1 Gbps. The article, published in Nature Communications, outlines the design strategy and potential application in visible light communications.
MEET US AT ICO CONFERENCE IN DRESDEN
23 Jan 2020
Submit an abstract to the 25th Congress of the International Commission for Optics (ICO) or the 16th International Conference on Optics Within Life Sciences (OWLS).
Check out the list of speakers, which includes three Nobel laureates! The conference will take place in Dresden, Germany, from Aug 31st to Sep 4th, 2020.
Deadline for abstract submission: March 12th, 2020
OLEDS WITH EXTREMELY HIGH BRIGHTNESS DEVELOPED
20 Jan 2020
In our recent paper, published in Advanced Optical Materials, we show our development towards extremely bright blue OLEDs. Using a fluorescent blue emitter, doped charge transport layers, optimizing layer structure and device dimensions, we reached 132,000 cd/m² and 2.4 mW/mm² optical power output at only 5 V. This opens new possibilities for OLEDs in applications that require high brightness such as biomedical devices, optical communication, or outdoor displays.
NARROWBAND ORGANIC LIGHT‐EMITTING DIODES FOR FLUORESCENCE MICROSCOPY AND CALCIUM IMAGING
05 Sep 2019
In our latest paper, published in Advanced Materials, we show for the first time that organic light‐emitting diodes (OLEDs) can be used as light source for fluorescence microscopy. We use spectral multiplexing to enable high contrast, which results in fluorescence images of live cells with similar image quality to conventional illumination. Furthermore, we applied the device to recording neuronal activity in Drosophila melanogaster at video rates.