Strain relaxation and domain enlargementviaphase transition towards efficient CsPbI₂Br solar cells

Abstract

CsPbI2Br perovskite is emerging as an attractive photovoltaic material due to its excellent stability against heat and illumination. However, a huge tensile stress of about 162 MPa is created during...

Carrier Management via Integrating InP Quantum Dots into Electron Transport Layer for Efficient Perovskite Solar Cells

“…To study the charge transfer at the ETL/perovskite interface, steady-state photoluminescence (PL) and time-resolved photoluminescence (TRPL) measurements were conducted on perovskite films deposited on different ETLs. The average lifetimes of the different samples were calculated by fitting the TRPL curves with a biexponential function. , When deposited on the hybrid InP CQD-based ETL, the perovskite film shows a significant quenched PL emission (Figure e) and a shorter average lifetime than that in SnO 2 /perovskite samples (Figure S12). The detailed calculation results are listed in Table S1.…”

“…The average lifetimes of the different samples were calculated by fitting the TRPL curves with a biexponential function. 40,41 When deposited on the hybrid InP CQD-based ETL, the perovskite film shows a significant quenched PL emission (Figure 3e) and a shorter average lifetime than that in SnO 2 / perovskite samples (Figure S12). The detailed calculation results are listed in Table S1.…”

Advances in Processing Kinetics for All‐Inorganic Halide Perovskite: Towards Efficient and Thermodynamic Stable Solar Cells

“…CsPbI 2 Br as compared to CsPbI 3 , a higher V oc is expected from the device, but even after rigorous improvements V oc from the cell was limited. Tao et al used interface engineering towards both top and bottom electrode and by using ITO/ZnO/Mg x Zn 1-x O/ CsPbI 2 Br/PM 6 /MoO 3 /Ag structure, they achieved an outstanding V oc of 1.34 V. [105] Recently, Miyasaka et al used PDTDT which has as a better-aligned energy level with the perovskite as HTM and achieved a V oc of 1.42 V. This leads to PCE of 17.36% under 1 Sun and 34.20% under 200 lux light illumination. [104] Wang et al used this wide-bandgap CsPbI 2 Br semiconductor with narrow-bandgap PM6:Y6-BO blend to fabricate a perovskite/organic tandem solar cells to increase the utilization of solar wavelength region (Figure 8j).…”

“…[13] This approach yielded an efficiency of 21.1% and a very small tandem open-circuit voltage loss of 0.06 V. This gives future direction for the use of this inorganic wide bandgap semiconductor in tandem solar cell application. In 2022, Hu et al exhibited enhanced domain growth due to strain relaxation by performing α → δ → α phase transition growth, which enabled them to achieve a remarkably high V oc of 1.36 V. [105] Table 3 lists the novelty, device architecture and yearly progress in efficiency of CsPbI 2 Br.…”

“…Tao et al. used interface engineering towards both top and bottom electrode and by using ITO/ZnO/Mg x Zn 1‐ x O/CsPbI 2 Br/PM 6 /MoO 3 /Ag structure, they achieved an outstanding V oc of 1.34 V. [ 105 ] Recently, Miyasaka et al. used PDTDT which has as a better‐aligned energy level with the perovskite as HTM and achieved a V oc of 1.42 V. This leads to PCE of 17.36% under 1 Sun and 34.20% under 200 lux indoor light illumination.…”