PhD-Postdoc series
The Next Generation Solar Energy (NGSE) PhD-Postdoc series aims to promote the work of emerging scientists in the field of solar energy. Whereas many talks at mainstream conferences are given by experienced professors and group leaders, here only early career researchers will be given a stage to promote a new generation of promising scientists.
Group leaders and professors are more than welcome to attend the talks and ask questions to the speaker. In this fashion, the series will provide a platform for experienced scientists to give feedback and challenge the young generation, but also to scout for future potential collaborators and colleagues.
This series aims to facilitate discussions and to allow for deeper insights into phenomena as well as characterization techniques. As such, presentations will focus on clearly defined topics covered in-depth, rather than a list of big achievements.
The series is organized by a committee of early career researchers.
Presentations will be around 30 minutes with copious time for questions. The series runs online via Zoom on the second and fourth Wednesday of every month. Sessions start at 5 PM Berlin time (GMT+2), which, depending on your location, translates, into 8 AM Los Angeles (GMT-7), 11 AM Montreal (GMT-4) or 11 PM (GMT+8) Beijing.
With the speakers’ permission (embargo period possible) the talks will be recorded and uploaded to the NGSE YouTube channel.
We look forward to welcoming all of you to these events,
Dr. V.M. Le Corre | Dr. Simon Kahmann
Registration:
The registration to attend the NGSE – PhD-Postdoc series is free of charge!
To register in advance please follow the links below:
Click here to register for the second Wednesday of the month’s talks
Click here to register for the fourth Wednesday of the month’s talks
Note that if you register once for either of the meetings you will not have to register again.
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Next Talk 13-Mar-2024 – Hannes Hempel:
Transient Photoluminescence of Lead Halide Perovskites Beyond Lifetimes
Transient photoluminescence (trPL) is the standard technique to quantify the lifetimes of photogenerated charge carriers in energy conversion materials. However, trPL decays are sensitive to processes other than only carrier recombination. We show that the initial trPL transients of lead halide perovskite thin films on glass are dominated by charge transport, namely hot carrier transport, spread-out of non-excitonic gemmate pairs, and redistribution. Including these processes in the modeling of trPL yields the doping and intrinsic carrier concentration, the mobility and diffusion coefficient, the hot carrier transport length, and the radiative and non-radiative lifetimes. Further, we calibrate trPL to absolute photon numbers, which allows quantifying the transient quasi-Fermi-level splitting and reveals fundamental energy losses in photo absorbers such as the increase of entropy by loss of geminate correlation and redistribution. The presented analysis is crucial for the appropriate interpretation of trPL and yields almost all optoelectronic properties relevant for application as a photo-absorber in solar cells.
Schedule:
Date: | Speaker: | Title & Abstract: | Link: | |
27-Sep-2023 | Pilar López Varo – Institut Photovoltaïque d’Île-de-France (FR) | Ion Migration in Perovskite Solar Cells in X-Ray Photoemission Spectroscopy | Link | |
11-Oct-2023 | Esma Ugur – KAUST, KSA | Overcoming the challenges of the perovskite-based tandem solar cells: A spectroscopy perspective | Link | |
25-Oct-2023 | Luke Sutherland – Monash University, Aus | Carbon Electrodes for Highly Efficient Small, Large, Rigid, and Flexible Perovskite Solar Cells | Link | |
8-Nov-2023 | Julien F. Gorenflot – KAUST, KSA | Transient absorption spectroscopy on organic photovoltaic materials: Why? How? And what? | Link | |
22-Nov-2023 | Mariam Ahmad – University of Southern Denmark, DK | Unveiling the electronic State interplay at TiOx/ITIC Electron transport layer/non-fullerene acceptor interfaces in highly efficient organic photovoltaics | Link | |
24-Jan-2024 | Lennart Reb – Technical University of Munich, DE | Next-Generation Solar Cells for Space Applications – Space Characterization and X-Ray Studies on Perovskite and Organic Solar Cells | Link | |
14-Feb-2024 | Zijian Peng – Friedrich-Alexander-Universität Erlangen-Nürnberg, DE | Understanding How 2D/3D Interfaces Deteriorate the Long-Term Stability of Perovskite Solar Cells under 85°C and Light-Soaking | Link | |
28-Feb-2024 | David Garcia Romero – University of Groningen, NL | Tin Oxide for High-Performance and Stable Organic Solar Cells | Link | |
13-Mar-2024 | Hannes Hempel – Helmholtz-Zentrum Berlin, DE | Transient Photoluminescence of Lead Halide Perovskites Beyond Lifetimes | Link | |
27-Mar-2024 | Abigail Hering – UC Davis, US | High-throughput characterization and machine-learning assisted analysis of halide perovskite stability | Link |