Research Progress of Green Solvent in CsPbBr3 Perovskite Solar Cells

Abstract

In optoelectronic applications, all-Brominated inorganic perovskite CsPbBr3 solar cells have received a great deal of attention because of their remarkable stability and simplicity of production. Most of the solvents used in CsPbBr3 perovskite solar cells are toxic, which primarily hinders the commercialization of the products. In this review, we introduce the crystal structure and fundamental properties of CsPbBr3 materials and the device structure of perovskite cells, summarize the research progress of green solvents for CsPbBr3 PSCs in recent years from mono-green solvent systems to all-green solvent systems, and discuss the approaches to improving the PCE of CsPbBr3 PSCs, intending to facilitate the sustainable development of CsPbBr3 perovskite solar cells. Finally, we survey the future of green solvents in the area of CsPbBr3 perovskite solar cells.

Controlling Thin Film Morphology Formation during Gas Quenching of Slot-Die Coated Perovskite Solar Modules

“…However, it is highlighted that the use of toxic solvents can be avoided. The implementation of green and sustainable perovskite precursor solvent systems, such as nonhazardous solvents (mostly DMSO-based)/alcohol/acid systems, is an ongoing research topic, and they are in constant evaluation of their comparability to the toxic counterparts. − Different alternative industry-friendly solvent systems for processing the perovskite absorber are nowadays investigated and compared to their toxic counterparts, e.g., in respect to the upscaling processability in an ambient environment or multifunctionality due to semipolar characteristics. , …”

Solution fabrication methods and optimization strategies of CsPbBr3 perovskite solar cells

“…Once the temperature drops to room temperature, the a and b phases return to the g phase, indicating superior stability under thermal and moisture induction. [33][34][35] As to the photoelectric characteristics, CsPbBr 3 perovskite possesses a wide bandgap of B2.3 eV, and can only absorb spectra with wavelengths less than B540 nm, which seriously restricts the improvement of the device efficiency. However, wide bandgap means a high open circuit voltage (V oc ) for the corresponding device, and so far, the champion V oc of CsPbBr 3 PSCs is up to 1.702 V, which is the highest among CsPbX 3 PSCs.…”

“…Once the temperature drops to room temperature, the α and β phases return to the γ phase, indicating superior stability under thermal and moisture induction. 33–35…”

Methanol as an anti-solvent to improve the low open-circuit voltage of CsPbBr3 perovskite solar cells prepared with water

“…27 However, the multi-step spincoating method is time-consuming and harmful to the environment and human health due to the large amount of methanol required. [28][29][30] Therefore, it is of great significance to find a lowtoxic solvent that can dissolve large amounts of CsBr.…”