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△ [20a-PB2-47] Charge Carrier Relaxation Process in Polymer:Non-Fullerene Acceptor Solar Cells
Keywords:organic solar cell, non-fullerene acceptor
Non-fullerene acceptors (NFAs) have attracted great interest as potential alternatives for fullerenes derivatives. Benefiting from the stronger absorption profiles, well-matched energy levels, and lower energy loss, the power conversion efficiency (PCE) of non-fullerene organic solar cells (NFOSCs) has surpassed 16%. Therefore, it is crucial to analyze the charge carrier dynamics in the NFOSCs is substantially important to advance the current device performances. To this end, herein, we evaluate the charge carrier relaxation process in (PBDB-T:ITIC) blend films by time of flight: time resolved microwave conductivity (TOF-TRMC) measurements. Furthermore, we also try to establish the correlation between the charge carrier relaxation and absorption edges of pristine and blend films.