| 초록 |
The synthesis strategy of the newly synthesized polymeric HTMs was similar to that of spiro-OMeTAD, with the exception that they were designed to exhibit dopant-free characteristics. In particular, The polymer backbone sturcture is similar but smaller, and all synthesis including polymerization consisted of three steps and polymer yield is more than 50%. On the other hand, the cost of synthesis at the lab scale was calculated to be one-eighth of that of spiro-OMeTADs. PCDA cost of synthesis approximately half cost of synthesis compared to spiro-OMeTAD. The PCE of dopant-free HTM-based PSCs was 11.01%, which is 1.5 times higher than that of the dopant-free spiro-OMeTAD-based devices 7.52% and comparable to that of the doped spiro-OMeTAD-based devices 11.88%. Notably, the stability of the device based on our dopant-free HTM was superior to those based on doped and dopant-free spiro-OMeTAD HTMs under ambient conditions. |
