| 초록 |
Perovskite solar cells (PSCs) have achieved high efficiency, but only limited number of materials such as PTAA and Spiro-OMeTAD have been selected as a hole-transporting layer (HTL) so far. These materials have major drawbacks such as high cost and need for the hygroscopic dopants. Poly(3-hexylthiophene) (P3HT) is a promising hole-transport materials with excellent optoelectronic properties and low cost. But PSCs using P3HT have reached the efficiency of only about 16%. In this work, the high efficiency of PSCs using P3HT is realized through the interface modification by an in situ reaction of n-hexyl trimethyl ammonium bromide (HTAB) between perovskite layer and HTL. The aliphatic moiety of HTAB promote the self-assembly of P3HT, which improves mobility of P3HT. For this reason, high performances of PSCs using P3HT can be achieved, with certified efficiency of 22.7%. The possibility of commercialization of PSCs confirmed by the application of P3HT as hole-transport layer. |
