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. 2020 Sep 23;11:4814. doi: 10.1038/s41467-020-18655-7

Fig. 2. Characterization of HTLs.

Fig. 2

a UPS spectra of the BA-functionalized CQD films and the conventional EDT-exchanged film. b Energy levels of the BA-functionalized CQD films and the EDT-exchanged film. c Normalized absorption and PL spectra of CQD films before and after ligand exchange. d Time-resolved PL spectra of CQD films before and after ligand exchange. e J–V characteristics of HODs with different HTLs.