研究目的
To fabricate high-performance planar heterojunction perovskite solar cells using a facile, environmentally benign, efficient and low-cost dip-coating deposition approach on a bilayered ZnO/TiO2 electron transport system from aqueous non-halide Pb(NO3)2.
研究成果
The study successfully demonstrated the fabrication of high-performance PHJ PrSCs using a dip-coating deposition approach on a ZnO/TiO2 bilayer ETL. The thickness of the ZnO layer was found to significantly affect the performance and stability of the perovskite films, with thinner ZnO layers yielding better results. This work advances the development of environmentally benign and low-cost manufacturing processes for large-area PrSCs.
研究不足
The study acknowledges the decomposition of MAPbI3 perovskite films during solvent drying and the influence of ZnO layer thickness on film stability and performance. The limitations include the need for optimization of ZnO layer thickness and the challenge of achieving uniform large-area films.
1：Experimental Design and Method Selection:
The study employed a sequential dip-coating (SDC) approach for fabricating perovskite films on a bilayered ZnO/TiO2 electron transport system. The method was chosen for its simplicity, environmental friendliness, and cost-effectiveness.
2：Sample Selection and Data Sources:
The samples included FTO-coated glass substrates, ZnO/TiO2 bilayered electron transport layers, and MAPbI3 perovskite films. Data sources were primarily experimental measurements of the fabricated devices.
3：List of Experimental Equipment and Materials:
Equipment included a PerkinElmer Lambda 2S UV-visible spectrometer, FESEM (Nova Nano-SEM 450), XRD (D/Max2500 V/PC), and a Keithley 2400 model digital source meter. Materials included Pb(NO3)2, MAI, spiro-OMeTAD, and ZnO sol–gel.
4：Experimental Procedures and Operational Workflow:
The procedure involved cleaning FTO substrates, depositing c-TiO2 and ZnO layers, fabricating MAPbI3 perovskite films via SDC and SSIER cycles, and completing the device with HTM and electrode layers.
5：Data Analysis Methods:
Data analysis included UV-vis absorption and PL spectra measurements, SEM and XRD for morphology and crystallinity analysis, and J-V curve measurements for photovoltaic performance evaluation.
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