Effects of interfacial energy level alignment on carrier dynamics and photovoltaic performance of inverted perovskite solar cells

Modification of NiOx hole transport layer for acceleration of charge extraction in inverted perovskite solar cells

“…S7 †), the E F values are À4.79 eV and À4.95 eV for c-NiO x and m-NiO x , respectively, and the VBM of m-NiO x is À5.36 eV, which is slightly lower than À5.22 eV of c-NiO x (see ESI † for calculation details). The value of m-NiO x is much closer to the VBM of the perovskite (À5.60 to À5.40 eV), [34][35][36] which can contribute to the improvement of charge collection and photovoltaic parameters. To investigate the photogenerated carrier extraction abilities of different HTLs from the perovskite absorber, the steady-state PL spectra and PL decay dynamics are measured, with the perovskite lms on quartz as reference.…”

Using Interfacial Contact Engineering to Solve Nickel Oxide/Perovskite Interface Contact Issues in Inverted Perovskite Solar Cells

“…To verify the hypothesis, we performed TPV decay measurements on porous-NiO X - and compact-NiO X -based devices under open-circuit conditions, as presented in Figure S4. It can be found that the device based on porous-NiO X exhibits faster decay (0.96 μs) than the device based on compact-NiO X (1.69 μs), indicating a higher trap density of the porous-NiO X -based device. , Based on the analysis, we proposed a bilayer-NiO X structure design.…”

TADF Molecule as an Interfacial Layer with Cascade Energy Alignment Enabling High Open-Circuit Voltage for 3D/2D Perovskite Solar Cells

“…The X-ray diffraction (XRD) patterns were first obtained to explore crystallinity and phases of different perovskite films with or without M1 (Figure S1, Supporting Information). Except for the 3D/2D/M1 film samples showing additional characteristic peaks at 9.0° and 13.6° associated with the (040) and (060) planes of 2D perovskite BA 2 (Cs 0.05 FA 0.79 MA 0.16 )­Pb 2 (I 0.83 Br 0.17 ) 7 , the other characteristic diffraction peaks correspond to the diffraction peak of the cubic perovskite, indicating that M1 just stays on the surface of the perovskite film and has no effect on the crystal structure …”

“…Except for the 3D/2D/M1 film samples showing additional characteristic peaks at 9.0°and 13.6°associated with the (040) and (060) planes of 2D perovskite BA 2 (Cs 0.05 FA 0.79 MA 0.16 )-Pb 2 (I 0.83 Br 0.17 ) 7 , the other characteristic diffraction peaks correspond to the diffraction peak of the cubic perovskite, indicating that M1 just stays on the surface of the perovskite film and has no effect on the crystal structure. 27 The champion J−V curves of PSCs are depicted in Figure 2a. Compared to the 3D PSC, with introducing the M1 interlayer into the 3D/2D perovskite, the PSCs' efficiency increased from 19.56 to 21.48% with an outstanding increase in V oc from 1.18 to 1.23 V. The photovoltaic performance of PSCs is summarized in Table 1.…”