Performance limiting factors in three end-group-brominated ITIC (β, γ, δ):PM6 bulk-heterojunction (BHJ) organic solar cells (OSCs) were investigated. The charge carrier dynamics (mobility and its relaxation) in these OSCs were evaluated by simultaneous time-of-flight (TOF)-time-resolved microwave conductivity (TRMC) measurement and photoinduced charge extraction by linearly increasing voltage (photo-CELIV) technique. The charge separation and recombination were found to be stronger power conversion efficiency-governing factors than mobilities and their balance, as suggested by regression analyses.
- Shaoxian Li
- Ryosuke Nishikubo
- Akinori Saeki
