Materials and Technologies for Making Perovskite-based Solar Cell Lin Yuanjing

Background Perovskite materials for solar cell Perovskite solar cell fabrication technology Conclusion

Breakthrough of Perovskite Solar Cells Amorphous Silicon Solar Cell 2014：19.3% Dye-sensitized Solar Cells Organic Photovoltaic

Classification of Perovskite Materials

Description of Organic-Inorganic Perovskite: ABX3 Materials: -CH3NH3PbI3 -CH3NH3PbI3-XClX, -CH3NH3PbI3-XBrX Role of doping (Cl, Br): - Increase diffusion length and thickness - Tune the bandgap and absorption Challenges: Increase the thickness: recombination of electron and hole Decrease the thickness less absorbtion Cubic perovskite crystal structure A: organic B:Pb, Sn X: halogen ion(I, Cl, Br)

Architecture of Perovskite Solar Cells General perovskite solar cell structure Vacuum energy level

Hole Transfer Layer: Spiro-MeOTAD, PEDOT: PSS Absorber Layer: Perovskite materials Electron Transfer Layer: Al2O3, ZrO2, TiO2, ZnO, PCBM Transparent Conducting Oxides Layer: ITO, FTO Electrode: Ag, Au, Al Au HTL TiO2+Perovskite FTO Glass

Fabrication Technology Solution Processes (Planar and mesostructured layer ) : One-Step Precursor Deposition (OSPD)--simplicity Sequential Deposition Method (SDM)--better control of perovskite morphology Evaporation Processes (Planar): Dual-Source Vapor Deposition (DSVD)-- extremely uniform film Vapor-Assisted Solution Process (VASP)-- high-quality perovskite film One-Step Precursor Deposition (OSPD). (b) Sequential Deposition Method (SDM).   (c) Dual-Source Vapor Deposition (DSVD (d) Vapor-Assisted Solution Process (VASP)

Conclusion Advantages Ease of fabrication Strong solar absorption Low non-radiative carrier recombination rates Compatible with other solar cells Toxicity issues--fabrication, deployment, disposal Degradation--moisture, ultraviolet radiation Commercial Challenge

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