Toward desirable 2D/3D hybrid perovskite films for solar cell application with additive engineering approach

Ionic Liquid Passivator for Mesoporous Titanium Dioxide Electron Transport Layer to Enhance the Efficiency and Stability of Hole Conductor-Free Perovskite Solar Cells

“…TMAOH’s defect passivation impact on MAPbI 3 thin films was confirmed using steady-state PL measurements on perovskite thin films formed on FTO/ho-TiO 2 /different ETLs with and without TMAOH treatments. As presented in Figure c, the PL intensity for TMAOH-based perovskites is clearly lower than that of perovskite on pristine ETL, suggesting a reduced defect density and a decrease in nonradiative charge recombination in MAPbI 3 with TMAOH treatments. , Notably, when the TMAOH coating speed was increased to 4000 rpm, the PL peak intensity increased, confirming the previously indicated negative impact of TMAOH overspeeding. As shown in Figure d, the FTO glasses coated with control ETL and TMAOH-modified ETL with the same thickness revealed comparable transmission responses, which implies the bandgap energy has not been altered by TMAOH treatment.…”

Introduction of cadmium chloride additive to improve the performance and stability of perovskite solar cells

“…The spiro-OMeTAD precursor was prepared as reported in the literature of (ref. 37 ) by dissolving 36.2 mg of spiro-OMeTAD (99%) in 500 μL chlorobenzene (CB, 99.9%) doped with LiTFSI, and 4- tert -butylpyridine (98%).…”

Efficient and hysteresis-free mixed-dimensional 2D/3D perovskite solar cells using ethyl lactate as a green additive to perovskite precursor solutions

“…The success of the anti-solvent technique in controlling crystal development to generate high quality films has been demonstrated by its use in achieving efficient and stable mixed cation HPSCs. 27…”

“…The success of the anti-solvent technique in controlling crystal development to generate high quality films has been demonstrated by its use in achieving efficient and stable mixed cation HPSCs. 27 Fangyv et al used an additive engineering approach based on green fumaric acid to modify the triple-cation perovskite for high-performance HPSCs. It has been found that fumaric acid not only stabilizes the [PbI 6 ] 4À framework of the perovskite crystals and efficiently passivates the surface defects, but it also improves nucleation processes to endow the perovskites with large sized grains and few GBs.…”