23-Nov-2022: Talk by Dr. Amran Al-Ashouri
On the 23rd of November, Dr. Amran Al-Ashouri a Postdoc at Helmholtz-Zentrum Berlin will give a talk entitled:
Boosting Perovskite Tandem Solar Cells and Exploring Charge Carrier Dynamics with Self-Assembled Monolayers
Abstract:
The usage of self-assembled monolayers (SAMs) as hole-selective layers was a key advancement for achieving >29%-efficient monolithic perovskite/silicon and >24%-efficient perovskite/CIGSe tandem solar cells. The SAMs also enabled model systems for a systematic study of charge extraction by transient methods.
The usage of self-assembled monolayers (SAMs) as hole-selective layers was a key advancement for achieving >29%-efficient monolithic perovskite/silicon and >24%-efficient perovskite/CIGSe tandem solar cells. The SAMs also enabled model systems for a systematic study of charge extraction by transient methods.
This talk covers a short introduction into the development of SAMs for perovskite solar cells (PSCs) and shows which design guidelines could be concluded for a hole-selective interface with minimal non-radiative recombination losses. The SAM model system further allowed an analysis of the influence of hole extraction speed on the fill factor of the PSCs. We found that hole extraction is around 100-times slower than electron extraction in state-of-the-art p-i-n PSCs, which still leaves room for further fill factor gains. Charge extraction and non-radiative recombination was dissected by transient and absolute photoluminescence, and transient surface photovoltage. Finally, an overview of the wide variety of use cases for the SAMs in perovskite solar cells is shown, underlining their versatility, simplicity and robustness.
Registration:
https://fau.zoom.us/webinar/register/WN_8kNzJbdQQTyKYiDu9ugK9w