Fig. 1. (a) TEM, HRTEM, and Fast Fourier Transform (FFT) images of CsPbI3 QDs. (b) Photographs of QD, P3HT, and P-QD solutions. (c) FTIR spectra of the OA, QD, P3HT, and P-QD. (d) Pphotographs under the illumination of UV light (365 nm), and (e) PL spectra for these studied solutions. (f) I-V curves of QDs, P3HT, and P-QD films tested under dark.
Fig. 2. (a) Schematic of fabrication processes for the CsPbI2Br film and hole conductor layer. (b) Cross-sectional SEM image of each functional layer. (c) Steady-state PL, and (d) PL delay curves of PVK, PVK/QD, PVK/P3HT, and PVK/P-QD films.
Fig. 3. (a) Energy-level alignment diagram of CsPbI2Br C-PSCs. (b) J-V curves of Ref-, QD-, P3HT-, and P-QD-cells. (c) Distribution of PCE of the studied solar cells. (d) SPO curves, (e,f) EQE spectra of Ref-, and P-QD-cells.
Fig. 4. (a) TPC, (b) TPV, (c,d) Jsc/Voc dependence on light intensities, (e) Fitted Nyquist plot curves under dark conditions, and (f) Mott-Schottky plots for Ref- and PQD-cell.