| 초록 |
A new hole transport material (HTM), named Spiro-mF-P, is designed and synthesized for fabrication of perovskite solar cells device applications. The electrochemical and thermal properties of Spiro-mF-P were systematically studied. Interestingly, Spiro-mF-P exhibited the highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) of -5.18 and -2.18 eV, respectively. The Spiro-mF-P was thermally stable up to 425 ˚C as revealed by its thermogravimetric analysis (TGA) (5% weight loss). Thus optimized device showed the maximum power conversion efficiency of 22.41% with a short-circuit current density of 25.18 mA/cm2, an open-circuit voltage of 1.14 V and a fill factor of 78.01 %. This results indicated that propargyl substituted Spirobifluorene based small molecule have great potential to further development of HTM. |
