溶剂中的微量水精确地影响有机太阳能电池活性层的形成过程
Fang Yang1,2, Erming Feng1,2, Yunfei Han3
1Hunan Key Laboratory for Super-microstructure and Ultrafast Process, School of Physics, Central South University, Changsha 410083, China.
The journal of physical chemistry letters
|August 25, 2025
概括
控制溶剂中的微量水对于优化有机太阳能电池至关重要. 降低水含量可增强活性层的形成,从而提高OSC设备的功率转换效率.
科学领域:
- 材料科学
- 可再生能源技术
- 有机电子
背景情况:
- 有机太阳能电池是一个有前途的可再生能源.
- 溶剂的纯度对OSC性能有显著影响,但微量水的作用尚不清楚.
研究的目的:
- 研究中的微量水对PM6:L8-BO OSC的薄膜形成和性能的影响.
- 阐明含水量,活性层形态和光伏特性之间的关系.
主要方法:
- 对中的微量水含量进行系统检测 (200,70和30 ppm).
- PM6:L8-BO OSC 的制造和表征.
- 对膜形成动态,分子聚合和结晶的分析.
- 性能评估包括功率转换效率 (PCE).
主要成果:
- 较低的微量水含量加速了液体到固体的转变和核化,促进了分子聚合和结晶.
- 在中优化的水含量 (30 ppm) 导致激素解离,电荷传输和收集的增强,同时抑制了重组.
- 使用30ppm水制造的设备的PCE达到18.49%,明显高于使用70ppm (16.12%) 和200ppm (13.15%) 的设备.
- 使用先进的孔输送层 (2PACz,Ph-4PACz) 进一步提高了PCE,达到19.57%和19.92%.
结论:
- 溶剂的纯度,特别是微量水含量,对OSC的效率和可重复性起着至关重要的作用.
- 精确控制溶剂中的水为优化OSC性能提供了可行的策略.
- 这一发现在不同的有机光伏系统中具有广泛适用性.
相关概念视频
01:12Solvents
67.2K
A solvent is a substance, most often a liquid, that can dissolve other substances. Here, the substance being dissolved is called a solute. When a solvent and a solute combine, they form a solution - a homogenous mixture of both the solvent and the solute. Water is a universal biological solvent. Its polar structure allows it to dissolve many other polar compounds. The ability of water to dissolve is governed by a balance between water molecules binding to each other and binding to the solute.
A...
A...
67.2K
01:15Theories of Dissolution: Diffusion Layer Model
932
Dissolution, the process by which drug particles dissolve in a solvent, is explained by the diffusion layer model, a theoretical framework that simulates the absorption of oral drugs and allows us to analyze experimental data.
This process starts with a thin layer, saturated with the drug, forming at the interface between the solid and liquid. The solute then diffuses from this layer into the main solution. The Noyes-Whitney equation suggests that the rate of dissolution relies on the diffusion...
This process starts with a thin layer, saturated with the drug, forming at the interface between the solid and liquid. The solute then diffuses from this layer into the main solution. The Noyes-Whitney equation suggests that the rate of dissolution relies on the diffusion...
932
02:03Xylem and Transpiration-driven Transport of Resources
24.6K
The xylem of vascular plants distributes water and dissolved minerals that are taken up by the roots to the rest of the plant. The cells that transport xylem sap are dead upon maturity, and the movement of xylem sap is a passive process.
24.6K
03:00Solubility
18.3K
Solution, Solubility, and Solubility Equilibrium
A solution is a homogeneous mixture composed of a solvent, the major component, and a solute, the minor component. The physical state of a solution—solid, liquid, or gas—is typically the same as that of the solvent. Solute concentrations are often described with qualitative terms such as dilute (of relatively low concentration) and concentrated (of relatively high concentration).
In a solution, the solute particles (molecules,...
A solution is a homogeneous mixture composed of a solvent, the major component, and a solute, the minor component. The physical state of a solution—solid, liquid, or gas—is typically the same as that of the solvent. Solute concentrations are often described with qualitative terms such as dilute (of relatively low concentration) and concentrated (of relatively high concentration).
In a solution, the solute particles (molecules,...
18.3K