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. 2018 Aug 13;9:3239. doi: 10.1038/s41467-018-05760-x

Fig. 3.

Fig. 3

The charge transfer between perovskite and different ETLs. a Dark I–V curves of the electron-only devices with the VTFL kink points. The inset shows the structure of the electron-only device. b Steady-state PL and c TRPL spectra with an excitation intensity of 3 μJ cm−2 of perovskite films deposited on different substrates