The Fine-Structure Constant as a Ruler for the Band-Edge Light Absorption Strength of Bulk and Quantum-Confined Semiconductors

Low-dimensional semiconductors have found numerous applications in optoelectronics. However, a quantitative comparison of the absorption strength of low-dimensional versus bulk semiconductors has remained elusive. Here, we report generality in the band-edge light absorptance of semiconductors, independent of their dimensions. First, we...

Charge transport along molecular wires

Imagine plastic electronics ... Consumer products such as mobile phones, mp3 players and palmtop computers that do not break when you accidentally drop them, with flexible displays. Moreover, these all plastic products would be cheaper than the current products based on conventional semi conductors. Apart from these advantaged, there is also a...

Enhanced charge-carrier mobility in ?-phase polyfluorene

Alkyl substituted polyfluorenes are promising candidates for use in organic display applications due to efficient, pure blue (polarized) luminescence, high charge carrier mobility, and good processabilty. Poly(9,9?-dioctylfluorene) (PFO) is an especially interesting polyfluorene derivative, because of its self-organization into distinct...

High intra-chain hole mobility on molecular wires of ladder type poly(p-phenylenes)

The high frequency mobility of charge carriers on isolated ladder-type polymer chains with lengths ranging from 13 to 54 monomer units was measured. Experiments were performed on isolated chains in dilute solution and on bulk solid samples. The ac mobility of charge carriers measured at a microwave frequency near 30 GHz is strongly dependent on...

Effect of intermolecular disorder on the intrachain charge transport in ladder-type poly( p -phenylenes)

High intrachain hole mobility on molecular wires of ladder-type poly(p-Phenylenes)