Anyi Mei

TL;DR: In this paper, a spray pyrolysis using a solution of dibutyltin bisacetylacetonate in ethanol was used to produce SnO2 compact layer for perovskite solar cells.

TL;DR: In this article , the main degradation mechanisms of perovskite solar cells and key results for achieving sufficient stability to meet IEC standards are summarized and limitations for evaluating solar cell stability and commercialization potential under the current IEC standard.

TL;DR: This work synthesized a bis-adduct 2,5-(dimethyl ester) C60 fulleropyrrolidine (bis-DMEC60) via a rational molecular design and incorporated it into the PMPSCs, suggesting that fullerene derivatives with multifunctional groups are promising for achieving high-performancePMPSCs.

Abstract: Halide perovskite semiconductors with extraordinary optoelectronic properties have been fascinatedly studied. Halide perovskite nanocrystals, single crystals, and thin films have been prepared for various fields, such as light emission, light detection, and light harvesting. High‐performance devices rely on high crystal quality determined by the nucleation and crystal growth process. Here, the fundamental understanding of the crystallization process driven by supersaturation of the solution is discussed and the methods for halide perovskite crystals are summarized. Supersaturation determines the proportion and the average Gibbs free energy changes for surface and volume molecular units involved in the spontaneous aggregation, which could be stable in the solution and induce homogeneous nucleation only when the solution exceeds a required minimum critical concentration (Cmin). Crystal growth and heterogeneous nucleation are thermodynamically easier than homogeneous nucleation due to the existent surfaces. Nanocrystals are mainly prepared via the nucleation‐dominated process by rapidly increasing the concentration over Cmin, single crystals are mainly prepared via the growth‐dominated process by keeping the concentration between solubility and Cmin, while thin films are mainly prepared by compromising the nucleation and growth processes to ensure compactness and grain sizes. Typical strategies for preparing these three forms of halide perovskites are also reviewed.

TL;DR: In this article, MAPbI3 perovskite with inhibited nucleation and promoted growth in the TiO2/ZrO 2/carbon triple mesoscopic scaffold was crystallized by modulating the precursor and the crystallization process.