| dc.description.abstract | The rapid progress of perovskite solar cell (PSC) is due to it has a simple assembly process, high efficiency and uses few materials, therefore the manufacturing cost is low. The certified power conversion efficiency (PCE) of PSC device has reached 25.5 % in 2021. Hole transporting layer (HTL) used in PSC devices must have high hole extraction efficiency, fast hole transport and the energy level of the frontier orbitals matches with those (valence band (VB) and conduction band (CB)) of the perovskite absorber. Spiro-OMeTAD and P3HT are commonly used HTL materials. In this study, the polymer synthesized by our lab, including P12, P15, P16, P17, P18, P19, P20, and P21, are used as HTL materials for regular PSCs. The hydrophobic properties of polymers film are used to increase the long-term stability of PSC devices. Higher boiling point solvent is used to make the polymer film more ordered, 4-iso-propyl-4′-methyldiphenyliodonium tetrakis(pentafluorophenyl)borate (DPI-TPFB) is used as the dopant, and 2-bromo-5-hexylthiophene (BHT) is used a perovskite/HTL interface passivation agent. P15 film is deposited on the Psk is less aggregated compared to P18 film, which can reduce the recombination of carriers therefore has better photovoltaic performance. The HOMO of DPI-TPFB@P15 is -5.44 eVwhich matches better the VB (-5.61 eV) of perovskite film than those of DPI-TPFB@P3HT and DPI-TPFB@P3HT HTLs. As a result PSC based on DPI-TPFB @P15 HTL has a highest Voc of 1.00 V. The power conversion efficiencies (PCEs) of the PSC based on DPI-TPFB@P15, DPI-TPFB@P18, and DPI-TPFB@P3HT HTLs are 17.08%, 11.75, and 11.63%, respectively. The PCE of the cell based on BHT/DPI-TPFB@P15, BHT/DPI-TPFB@P18, and BHT/DPI-TPFB@P3HT HTLs increase to devices are 18.17%, 15.03%, and 14.79%, respectively. The cell based on BHT/DPI-TPFB@P15 HTL also has the smallest hysteresis index of 6.7% compare to those (9.1% and 14.0%) of the other two cells. | en_US |