研究目的
To develop a route to obtain a solar cell composed by hybrid perovskite (CH3NH3PbI3) using a sequential deposition method through the techniques of spin-coating and immersion, aiming to reach the highest energy efficiency level attainable.
研究成果
The study successfully synthesized CH3NH3PbI3/TiO2 films using a sequential deposition method, demonstrating the influence of PbI2 layer thickness on the formation of perovskite crystals. The PV-3 sample showed the most homogeneous distribution of perovskite and the most expressive absorption. The methodology allows for fast production of thin films with lower cost due to their possible production in ambient conditions, indicating potential for future use in solar cells.
研究不足
The study was conducted at ambient conditions (room temperature and open atmosphere), which may affect the reproducibility and stability of the perovskite films. The hydrophilic character of TiO2 and the rapid cooling of PbI2 solution at higher deposition speeds influenced the formation of perovskite crystals, indicating potential areas for optimization in deposition techniques and conditions.
1：Experimental Design and Method Selection:
The study employed a sequential two-step method of deposition for halide perovskite (CH3NH3PbI3) over a mesoporous TiO2 layer deposited in F doped SnO2. The methods included spin-coating and immersion techniques.
2：The methods included spin-coating and immersion techniques.
Sample Selection and Data Sources:
2. Sample Selection and Data Sources: Glass covered with FTO (Fluorine doped Tin Oxide) was used as the substrate. The samples were cleaned and prepared with TiO2 paste and PbI2 solution.
3：List of Experimental Equipment and Materials:
TiO2-P25 (Evonik), titanium isopropoxide (97 %, Sigma-Aldrich), carboxi methyl cellulose (Sigma-Aldrich), terpineol (Sigma-Aldrich), acetyl acetonate (Sigma-Aldrich), ethanol (99 %, Zeppelin), PbI2, anhydrous N, N-Dimethylmethanamide, CH3NH3I in anhydrous isopropanol.
4：Experimental Procedures and Operational Workflow:
The TiO2 mesoporous layer was deposited by spin coating, followed by sintering. The perovskite layer was prepared using sequential two steps method with PbI2 solution deposition by spin coating at different speeds, followed by conversion into perovskite crystals through spin coating using a CH3NH3I solution.
5：Data Analysis Methods:
Morphological characterization was performed using scanning electron microscopy (SEM). Optical bands were determined by diffuse reflectance measurements, and X-ray diffractogram was used for crystallographic analysis.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容
