The Photo-CD team published a new article:
Harshita Bhatia, Masoumeh Keshavarz, Cristina Martin, Liam Van Gaal, Yiyue Zhang, Brend de Coen, Nadine J. Schrenker, Donato Valli, Martin Ottesen, Martin Bremholm, Joris Van de Vondel, Sara Bals, Johan Hofkens and Elke Debroye
ACS Appl. Opt. Mater. 2023, 1, 6, 1184–1191
Abstract
The addition of potassium thiocyanate (KSCN) to the FAPbBr3 structure and subsequent post-treatment of nanocrystals (NCs) lead to high quantum confinement, resulting in a photoluminescent quantum yield (PLQY) approaching unity and microsecond decay times. This synergistic approach demonstrated exceptional stability under humid conditions, retaining 70% of the PLQY for over a month, while the untreated NCs degrade within 24 h. Additionally, the devices incorporating the post-treated NCs displayed 1.5% external quantum efficiency (EQE), a 5-fold improvement over untreated devices. These results provide promising opportunities for the use of perovskites in moisture-stable optoelectronics.
