Extended Data Fig. 5: Internal quantum efficiency of DR3-, PBDB-T-2F-, PTB7-Th- and PBDB-T-SF-based devices. | Nature Materials

Extended Data Fig. 5: Internal quantum efficiency of DR3-, PBDB-T-2F-, PTB7-Th- and PBDB-T-SF-based devices.

From: Intrinsic efficiency limits in low-bandgap non-fullerene acceptor organic solar cells

Extended Data Fig. 5: Internal quantum efficiency of DR3-, PBDB-T-2F-, PTB7-Th- and PBDB-T-SF-based devices.

Internal quantum efficiency (IQE) spectra of DR3- (a), PBDB-T-2F- (b) PTB7-Th- (c), and PBDB-T-SF-based devices. The IQE of each solar cell was calculated using: IQE(%) = 100*EQE(%)/(100% – Reflectance(%) – Parasitic Absorption (%)). The reflectance spectra were collected with an integrating sphere using the same EQE measurement system, while the parasitic absorption was calculated using transfer matrix modelling.

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