Polarización del Disolvente para Regular la Fase Intermedia y la Cristalización Dinámica de Películas de Perovskita

Zhuoqiong Zhang1,2, Yunfan Wang3, Weizhen Wang1

  • 1Department of Applied Physics, The Hong Kong Polytechnic University, Hong Kong SAR, P. R. China.

Resumen

Los investigadores desarrollaron un nuevo método que utiliza polímeros polares para controlar la cristalización de perovskita en células solares. Esta técnica mejora la calidad de la película, lo que conduce a una mayor eficiencia y estabilidad en las células solares de perovskita (PSC).

Videos de Conceptos Relacionados

Recrystallization: Solid–Solution Equilibria01:10

Recrystallization: Solid–Solution Equilibria

Recrystallization is a purification technique used to separate impurities from solid compounds. In this technique, no chemical reactions occur. Instead, it exploits physical properties only, specifically, the solubility differences between the desired compound and impurities, either at a single temperature or at different temperatures, and under other selected conditions. The solid-solution equilibrium (solubility equilibrium) of each component in the solution represents a binary phase...
2.2K
Crystal Growth: Principles of Crystallization01:25

Crystal Growth: Principles of Crystallization

Crystallization is a phase transformation process in which crystals are precipitated from a supersaturated solution or formed from other sources. During crystallization, atoms or molecules arrange themselves into a well-defined, rigid crystal lattice to minimize energy.
Initiating crystallization involves manipulating the concentration of the solute and the temperature of the solution. Since crystal growth occurs when the ratio of concentration and solubility of the solute in the solvent...
4.7K
Colloidal precipitates01:09

Colloidal precipitates

The high insolubility of some precipitates can result in an unfavorable relative supersaturation. This can lead to colloidal particles with a large surface-to-mass ratio, where adsorption is promoted. For instance, in the precipitation of silver chloride, silver ions are adsorbed on the surface of the colloidal particles, forming a primary layer. This layer attracts ions of opposite charge (such as nitrate ions), forming a diffuse secondary layer of adsorbed ions. This electric double layer...
4.9K