| 초록 |
The hole transport layer in perovskite solar cells (PSCs) performs a particularly important role in transporting holes and preventing direct contact with moisture in the air. However, hole transport materials (HTMs) require deliquescent and hygroscopic dopants, which are detrimental to device lifetimes due to their low hole mobilities. Here, we report a novel D–A polymeric HTM, which results in highly efficient and stable perovskite solar cells. The hole mobility of synthesized was 3.09103 cm2 V_1 s_1 without any dopants. which was even greater than that of P-OR. The RCP-based perovskite solar cell exhibits the highest efficiency (17.3%) in the absence of dopants. In addition, the long-term stability of the device is dramatically improved by avoiding deliquescent or hygroscopic dopants and by introducing a hydrophobic polymer layer. RCP devices maintain their initial efficiency for over 1400 h at 75% humidity, whereas devices made of HTMs with additives fail after 900 h. |
