相关实验视频

Updated: Feb 16, 2026

Influence of Hybrid Perovskite Fabrication Methods on Film Formation, Electronic Structure, and Solar Cell Performance

Influence of Hybrid Perovskite Fabrication Methods on Film Formation, Electronic Structure, and Solar Cell Performance

Published on: February 27, 2017

在近二维矿和高性能太阳能电池中探索结晶动力学

Ning Zhou¹, Yiheng Shen¹, Liang Li¹

¹Beijing Key Laboratory for Theory and Technology of Advanced Battery Materials, Department of Materials Science and Engineering, College of Engineering, Peking University No. 5 Yiheyuan Road, Haidian District, Beijing 100871, P. R. China.

Journal of the American Chemical Society

|December 16, 2017

概括

降低尺寸的化物矿提供了更好的稳定性和性能. 这项研究揭示了如何通过FA+纳入半二维矿来控制结晶动力学,从而获得高质量的薄膜和高效的光伏设备.

科学领域:

材料科学
固态化学
太阳能发电

背景情况:

减小尺寸 (近二维) 化矿比3D对应物具有更好的稳定性.
它们的合成通常包括在 (A1) 2 ((A2) n-1PbnI3n+1薄膜中调整A位子.
结晶动力学及其对薄膜特性的影响尚未完全理解.

研究的目的:

为了研究准2D (Q-2D) 矿的结晶动力学.
了解多晶膜中的晶体方向与载体行为之间的关系.
优化Q-2D矿组成以提高光伏性能.

主要方法:

作为一个模型系统,使用了三元化,特别是 (BA) 2 (MA,FA) 3Pb4I13.
使用现场光发光谱 (PL) 来监测相位形成.
分析了纳入formamidinium (FA+) 对结晶和薄膜质量的影响.

主要成果:

适当的FA+结合控制了矿结晶动力学,减少了非辐射重组中心.
获得了高质量的非定向相片.
在现场PL显示了连续的相位形成:在n=∞相位之前形成的Q-2D相位 (n=2,3,4).
在 (BA) 2 ((MA,FA) 3Pb4I13 Q-2D太阳能电池中实现了12.81%的最高功率转换效率.

结论:

在控制Q-2D矿结晶和提高膜质量的过程中,FA+是关键因素.
了解结晶机制可以了解Q-2D矿中的效.
优化的Q-2D矿薄膜显示出高效光伏应用的潜力.

更多相关视频

Flash Infrared Annealing for Perovskite Solar Cell Processing

Flash Infrared Annealing for Perovskite Solar Cell Processing

Published on: February 3, 2021

Low Pressure Vapor-assisted Solution Process for Tunable Band Gap Pinhole-free Methylammonium Lead Halide Perovskite Films

Low Pressure Vapor-assisted Solution Process for Tunable Band Gap Pinhole-free Methylammonium Lead Halide Perovskite Films

Published on: September 8, 2017

相关概念视频

Recrystallization: Solid–Solution Equilibria

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...

Crystal Growth: Principles of Crystallization

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...