D–π–D molecular semiconductors for perovskite solar cells: the superior role of helical versus planar π-linkers

Abstract

A thia[5]helicene based molecular semiconductor maintains π–π stacking, ensuring a large domain of molecular aggregates and a high hole mobility.

Stable Perovskite Solar Cells Using Molecularly Engineered Functionalized Oligothiophenes as Low‐Cost Hole‐Transporting Materials

“…[6][7][8][9][10] They can be classified as inorganic, [11] polymeric, [12] and small molecular organic HTMs. [13,14] Among them, small molecular HTMs are superior to other counterparts owing to their structural diversity, well-defined molecular Triarylamine-substituted bithiophene (BT-4D), terthiophene (TT-4D), and quarterthiophene (QT-4D) small molecules are synthesized and used as low-cost hole-transporting materials (HTMs) for perovskite solar cells (PSCs). The optoelectronic, electrochemical, and thermal properties of the compounds are investigated systematically.…”

Methylthiophene terminated D–π–D molecular semiconductors as multifunctional interfacial materials for high performance perovskite solar cells

“…[43][44][45] This motivated us to develop semiconducting interfacial materials (SIMs) through functionalizing D-p-D molecular semiconductors. In most cases, the donor units of these molecular semiconductors are methoxy substituted arylamine derivatives such as diphenylamine, 46,47 triphenylamine and carbazole. 48 The terminal methoxy groups play an important role in modulating the energy level and anchoring the material onto the underlying perovskite layer.…”

Synthesis, Characterization, and Thin-Film Transistor Response of Benzo[i]pentahelicene-3,6-dione

“…A handful of studies are available for other types of devices, such as organic light emitting diodes [ 37 , 38 , 39 , 40 , 41 , 42 , 43 , 44 , 45 , 46 , 47 , 48 , 49 , 50 , 51 , 52 , 53 , 54 , 55 , 56 ], organic solar cells [ 57 , 58 , 59 ], and hybrid DSSC [ 60 ] and perovskite solar cells [ 61 , 62 , 63 , 64 , 65 , 66 , 67 , 68 , 69 , 70 , 71 , 72 ].…”