Lukas Wagner

Charge Extraction Multilayers Enable Positive-Intrinsic-Negative Perovskite Solar Cells with Carbon Electrodes Perovskite solar cells achieve high power conversion efficiencies but usually rely on vacuum-deposited metallic contacts, leading to high material costs for noble metals and stability issues for more reactive metals. Carbon-based materials offer a cost-effective and potentially more stable alternative. The vast majority of carbon-electrode PSCs use the negative-intrinsic-positive (n-i-p) or “hole-transport-layer-free” architectures. Here, we present a systematic study to assess the compatibility of “inverted”, p-i-n configuration PSC contact layers with carbon top electrodes. We identify incompatibilities between common electron transport layers and the carbon electrode deposition process and previously unobserved semiconducting properties in carbon electrodes with unique implications for charge extraction and electronic behavior. To overcome these issues, we introduce a double-layer atomic layer deposited tin oxide (SnO2) and Poly(2,3-dihydrothieno-1,4-dioxin)-poly(styrenesulfonate) (PEDOT:PSS), yielding up to 16.1% PCE and a retained 94% performance after 500 h of outdoor aging. The study is a crucial step forward for printable, metal-electrode-free, and evaporation-free perovskite PV technologies.

5 years ago we started working on carbon electrodes for p-i-n devices. Little did we know how difficult it would turn out to be. But hey we did it 🤗 also found out that carbon electrodes are actually semiconducting

pubs.acs.org/doi/full/10....

Photo of the plant visit

The semester ends with a highlight for my “ #Sustainability of Materials and Technologies” lecture: we visited the Fritz Winter plant, Germany’s largest iron foundry. Fascinating tour and exciting discussions how to reach #CarbonNeutrality and material #circularity at this heavy industry branch.

Einladung zur 14. Veranstaltung der MarburgSustainabilityTalks 2025

Heute enden die #MarburgSustainabilityTalks 2025 mit dem Vortrag zu #ÖkologischerHandabdruck. Ich freue mich auf einen Vortrag von Carina Spieß, Referentin #BNE, @germanwatch.bsky.social zu “Wissen mit Wirkung: #Zukunftsbildung als Fundament für die nachhaltige Transformation”.

Marburg sustainability talks, Tuesdays 16:15, large physics lecture hall and online.

Today we discuss #SustainableCities at the #MarburgSustainabilityTalk: Assistant Professor Noura Wahby, American University in Cairo and cam.ac.uk University of Cambridge will talk about “Sustainable Urban Water Access: Cairo's Community-led Initiatives”.

Marburg Sustainability Talks, 16:15, größer Hörsaal Physik Marburg

Ich freue mich auf den Vortrag von Prof. Angela Francke, #Radverkehr und Nahmobilität, Universität Kassel, bei den heutigen #MarburgSustainabilityTalks: „Auf die Räder, fertig, los: Wege zur #Mobilitätswende”

INvitation to the MarburgSustainability talks on July 1st 2025, 16:15 CET, large physics lecture hall at UNiversity of Marburg or online.

Today at the #MarburgSustainabilityTalsk: Jiska de Groot from the African Climate & Development Initiative acdi.bsky.social, University of Cape Town will talk about “The human factor: Lessons from decades of technological innovation for #sustainable #energy futures“.

Tuesday, 17 June 2025. Marburg sustainabilitys in the physics lecture hall, also streamed online.

"What do we (not) know about the #resilience of the global #foodsystem?" - Estelle Paulus (ecioxford.bsky.social‬ @ox.ac.uk ) will talk about this tomorrow at the #MarburgSustainabilityTalks. I'm really excited to hear what she'll tell us about "resilient doughnuts."🌍🍩

Sharepic zur Sustainability Talks Filmvorführung im Kino Capitol, 10.06. 16:15.

ECTS im Kino sammeln? Nur heute bei den #MarburgSustainabilityTalks: Filmvorführung im Capitol “urgewald - Auf den Spuren des Geldes” und anschließendes Gespräch mit Pia Wiesner und Judith Hentschel von urgewald e.V.

YouTube video by Solar@FAU Can humanity make the energy transition the great success story of the 21st century?

Recommendation: Marius Peters from @solarfau.bsky.social released a video of his great talk. He puts the task or our generation, the #EnergyTransition in the context of large civilisational projects humankind has mastered in the past. www.youtube.com/watch?v=LPT0...

It was a great pleasure welcoming Patrick Flamm @ptrckflmm.bsky.social from the Peace Research Institute Frankfurt last week at the #MarburgSustainabilityTalks. After a tour through the #MarburgPeroLab, he was giving a talk on #Peace and #Security in the #Anthropocene.

Marburg Sustainability Talks 03.06.25

Heute bei den #MarburgSustainabiltyTalks: Prof. @frederic-hanusch.bsky.social von der @jlugiessen.bsky.social spricht zum Thema “Planetares Denken und Handeln: Politik mit dem Planeten” #PlanetaryThinking

Marburg sustainability talks, Tuesdays, 4 pm, large physics lecture hall in Marburg.

Todays topic at the #MarburgSustainabilityTalks: “Driving cracks in ideology: Utopian thinking, structural attributions, and system change in the climate crisis”. I am looking forward to the talk from Dr. Edward Clarke, researcher on social psychology at the @unimarburg.bsky.social.

How can we make TW-scale PV #sustainable? If you are at the #HOPV25 conference in Rome and want to find out more, join my invited talk, today in session 1B2 (sustainability of #perovskite PV).

Picture showing participants of UK German springboard meeting in Edinburgh.

Thank you Yue Hu for organizing the #UKGermany Springboard Meeting on #Perovskite PV at University of #Edinburgh with USwansea, @ox.ac.uk , HZB, @unistuttgart.bsky.social & @unimarburg.bsky.social. Great discussions ...and even lots of sunshine in Scottland.

Sharepic zu den Marburg Sustainability Talks. 06.05.25.

Heute spricht Dr. Michaela Meurer bei den #MarburgSustainabilityTalks zum Thema Zivilgesellschaftliches Handeln - Klimawandel und Strategien der Resilienz in Brasilien und Mosambik. 16:00 gr. HS Physik @unimarburg.bsky.social oder online.

Sharepic für den zweiten Vortrag der Sustainability Talks:29.04.25, 16:15, Renthof 5 oder online.

Heute bei den #MarburgSustainabilityTalks: Green New Deals - Unvereinbar? #Klimapolitik und soziale Gerechtigkeit.
Dazu wird Dr. Juliane Schumacher vom Leibniz-Zentrum Moderner Orient Berlin @zmo-berlin.bsky.social sprechen.

Vortragseinladung "Energiekonflikte in Deutschland"

Heute starten die #MarburgSustainabilityTalks 2025 mit dem Thema: " #Energieversorgung - #Energiekonflikte in Deutschland". Dazu spricht Prof. Dr. Sören Becker von der @unimarburg.bsky.social, um 16:15 Uhr im großen Hörsaal Physik und online.
@physicsmarburg.bsky.social

More infos here: www.uni-marburg.de/de/universit...

Program of the Marburg Sustainability Talks 2025

I am looking forward to meeting inspiring speakers from Marburg, Kassel, Frankfurt... Oxford, Cairo and Cape Town.
Join us online or in person in the lecture hall of @physicsmarburg.bsky.social - every Tuesday at 4pm.

Title picture announcing the Marburg Sustainability Talks 2025

Next week we launch the 3rd edition of the #MarburgSustainabilityTalks, the lecture series on #Sustainability at @unimarburg.bsky.social. This year we are discussing "Sustainability in crisis - shaping futures"(German and English talks).

In my way home from an exciting day at HIERN @fau.de in Erlangen. Thank you Marius Peters for the invitation to give a talk about #sustainability of #TW-scale #PV.

‘A place of joy’: why scientists are joining the rush to Bluesky Researchers say the social-media platform — an alternative to X — offers more control over the content they see and the people they engage with.: https://www.nature.com/articles/d41586-024-03784-6

There are already many articles for which there is more attention on Bluesky than on other comparable micro-blogging sites, meaning the academic community and the general public have clearly adopted Bluesky as one of its core places to disseminate and discuss new research.

A Place of Joy.

Structure of the SusMaT lecture.

Today is the last day of the summer semester. I am looking back to a lot of work and fun designing my very first lecture from scratch:
"Sustainability of Materials and Technologies"
Thanks to my students for the exciting discussions and good luck with the exam!

The call for abstracts of the #Carbon #Club 2024 is now open. Don't miss your chance to apply for a talk on Carbon electrode based #Perovskite #Solar #Cells: carbon-club.net

Letzten Veranstaltung der Marburg Sustainability Talks 2024, 17.07.2024, 18:15-19:45, Universitätsbiubliothek Marburg.

Heute ist die letzte Veranstaltung der #Marburg #Sustainability Talks in diesem Semester. Sie endet mit einem Abschlussworkshop zu Zukunftsgestaltung: Adrian Ganz (Das PolitikLabor) lädt uns ein auf einen Blick zurück aus der Zukunft.

Marburg Sustainability Talks, 19.06.24. Universitätsbibliothek Marburg

Morgen bei den #Marburg #Sustainability Talks: " #Nachhaltigkeit im #Labor – Im Spannungsfeld zwischen Ambition, Regulatorik, und Laborpraxis". Ich freue mich auf Vorträge und Diskussionen mit Hermine Hitzler (@maxplanck.bsky.social Generalverwaltung,) und @ikuzu.bsky.social (Uni Marburg).

Lukas Kocher von Munich Re hält einen Vortrag zur Frage "Wie wollen wir mit #Klimarisiken umgehen?"

Schäden durch klimawandelbedingte #Extremwetter sind leider wieder ein sehr aktuelles Thema. Bei den #Marburg #Sustainability Talks spricht heute Abend Lukas Kocher von MunichRe zur Frage "Wie wollen wir mit #Klimarisiken umgehen?"

Das Sharepic zeigt das Programm der Marburg Sustainability Talks: 05.06.24 - Wie wollen wir die Natur rechtlich verorten?

Heute bei den #Marburg #Sustainability Talks: Wie wollen wir Natur rechtlich verorten?
Ich freue mich auf spannende Vorträge von Jenny García Ruales (Uni Marburg) und Elena Ewering (Uni Kassel).

Nikolaj Schultz will speak at the Marburg Sustainability Talks.

Nikolaj Schultz will speak at the #Marburg #Sustainability Talks this Wednesday, 29.05. I am excited to hear his talk about “Three Points for the Political Ecologists to Remember”.

Dr. Veronika Huber (LMU München) spricht zum Thema “Klimawandel - Risiken und Chancen für die menschliche Gesundheit”.

Heute Abend (22.05.) bei den #Marburg #Sustainabity Talks: Wie wollen wir unsere #Gesundheit schützen.
Dr. Veronika Huber (LMU München) spricht zum Thema “Klimawandel - Risiken und Chancen für die menschliche Gesundheit”.