Real-Time Tracking of Hot Carrier Injection at the Interface of FAPbBr₃ Perovskite Using Femtosecond Mid-IR Spectroscopy.

ABSTRACT: One of the most effective approaches to optimizing the performance of perovskite solar cells is to fully understand the ultrafast carrier dynamics at the interfaces between absorber and transporting layers at both the molecular and atomic levels. Here, the injection dynamics of hot and relaxed charge carriers at the interface between the hybrid perovskite, formamidinium lead bromide (FAPbBr₃), and the organic electron acceptor, IEICO-4F, are investigated and deciphered by using femtosecond (fs) mid-infrared (IR), transient absorption (TA), and fluorescence spectroscopies. The visible femtosecond-TA measurements reveal the generation of hot carriers and their transition to free carriers in the pure FAPbBr₃ film. Meanwhile, the efficient extraction of hot carriers in th

SUBMITTER: Nadinov I 

PROVIDER: S-EPMC10823510 | biostudies-literature | 2024 Jan

REPOSITORIES: biostudies-literature