Synergistic effect of alkali metal doping and thiocyanate passivation in CsPbBr₃ for HTM-free all-inorganic perovskite solar cells

Abstract

All-inorganic CsPbBr3 perovskite solar cells (PSCs) without hole-transport materials (HTMs) have attracted widespread attention because of their significant environmental stability. However, the poor quality of perovskite film and the energetics...

Improving the performance of perovskite solar cells using a dual-hole transport layer

“…The external quantum efficiency (EQE) spectra of the two devices were collected to investigate the variation of J sc . 59–61 As shown in Fig. 5b, the dual-HTLs device exhibited a higher EQE response in the board region compared to the P3CT-only device, indicating higher photon conversion efficiency.…”

Effect of Yttrium-Incorporated TiO2 Electron Transport Layer on the Photovoltaic Performance of Triple-Cation Perovskite Solar Cells

“…Mott–Schottky curves were implemented to examine the charge transport and recombination behavior of the devices with different ETLs. As shown in Figure d, the PSC assembled with Y-TiO 2 ETL exhibits an increased built-in potential ( V bi ) compared with the control device, suggesting an increased driving force for charge separation and transport in the former PSC . It may be due to the better energy-level alignment in the Y-TiO 2 -based device, and it will decrease the interfacial charge accumulation in the PSCs.…”

“…As shown in Figure 6d, the PSC assembled with Y-TiO 2 ETL exhibits an increased built-in potential (V bi ) compared with the control device, suggesting an increased driving force for charge separation and transport in the former PSC. 41 It may be due to the better energy-level alignment in the Y-TiO 2 -based device, and it will decrease the interfacial charge accumulation in the PSCs. The results again demonstrate the reduction of charge recombination in a Y-TiO 2 -based PSC device.…”

“…As shown in Figure 6d, the PSC assembled with Y-TiO 2 ETL exhibits an increased built-in potential (V bi ) compared with the control device, suggesting an increased driving force for charge separation and transport in the former PSC. 41 It may be due to the better energy-level alignment in the Y-TiO…”

Achieving Precise Control of Defect States and Residual Strain in Perovskite Solar Cells Using π-Conjugated Dual-Anchor Molecules

“…XRD results (Figure S3) revealed no change in crystallinity, indicated by identical diffraction intensities, though a slight peak displacement suggests reduced surface spacing/lattice contraction. 26 SEM showed unchanged grain size, indicating that ABA does not erode or destroy grain boundaries/surfaces (Figure S4). EDS mapping proved that ABA molecules were evenly distributed on CsPbBr 3 film surfaces (Figure S5).…”