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TOP-HTM-α2: A Hole-transporting Material Enhancing the Conversion Efficiency and Stability of Perovskite Solar Cells
TOP-HTM-α2 is being developed as a hole transport material (HTM) for perovskite solar cells (PSCs).1) When TOP-HTM-α2 is incorporated into perovskite solar cells with a MAPbI3 perovskite layer, comparable conversion efficiency to devices using Spiro-OMeTAD, a well-known HTM, have been achieved. Notably, additive-free TOP-HTM-α2 demonstrates high conversion efficiency similar to its additive-containing counterparts in contrast to the Spiro-OMeTAD-based devices, and achieves a good operational stability higher than additive-containing Spiro-OMeTAD devices. In addition, additive-containing TOP-HTM-α2 has recently shown high conversion efficiency in devices using a triple cation perovskite layer. Particularly, when a low-boiling-point solvent dichloromethane is used in spin-coating, TOP-HTM-α2 exhibits a remarkable conversion efficiency of 20.18%, which is higher than 18.85% achieved by Spiro-OMeTAD-based devices. This result is indicated to be related to its more uniform film surfaces.2) Additionally, high conversion efficiency and its stability are reported in additive-free TOP-HTM-α2 devices using FAPbI3 as a perovskite layer.3) These results highlight the potential of TOP-HTM-α2 as a HTM in various perovskite solar cell devices and is expected to contribute to research and industrialization of perovskite solar cells.
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References
- 1) Additive-free, Cost-Effective Hole-Transporting Materials for Perovskite Solar Cells Based on Vinyl Triarylamines
- 2) An Alternative to Chlorobenzene as a Hole Transport Materials Solvent for High-Performance Perovskite Solar Cells
- 3) Experimental investigation of additive free-low-cost vinyl triarylamines based hole transport material for FAPbI3-based perovskite solar cells to enhance efficiency and stability
