Hole-transport materials based on the terthienyl core unit for efficient perovskite solar cells

Abstract

Thiophene and oligothiophenes have outstanding electronic properties, especially their electron-rich nature of would endow good interfacial contact with perovskite layer, making them an ideal building blocks for hole transport materials...

Molecular engineering of methoxy-substituted terthienyl core unit based hole transport materials for perovskite solar cells

“…Recently, our group also reported oligothiophene-based HTM THP-1 and successfully employed it in PSCs. 44 During the optimization, we found that the deep-lying highest occupied molecular orbital (HOMO) energy level of THP-1 results in insufficient charge transfer driving force and thus affects the PSC device performance. To increase the HOMO energy level of conjugated materials, the addition of electron-giving groups is one of the most successful methods.…”