Tuning of the photo‐ and electroluminescence in multi‐block copolymers of poly[ (silanylene)thiophene]s via exciton confinement

Abstract

The combination of wide‐ and narrow‐band‐gap polymers in a block copolymer can provide a means of increasing the luminescence efficiency of the materials. This occurs because the excitons that are formed are trapped within specific units in the polymer chains and therefore cannot migrate to quenching sites caused by the presence of dopants. Color‐tunability is also possible through adjusting the band gaps of the components. Devices based on silanylene'thiophene lock copolymers are reproted.

Photophysical properties of ?-?-conjugated alternating oligothienylene-oligosilylene polymers

“…34 In these polymers, the oligothiophene blocks exhibit -conjugation, whereas the oligosilylene blocks can be considered as being intrinsically nonconjugated. Therefore, these polymers can be taken as polymers with predetermined conjugation length, being similar to the carbon atom-bridged polymers as mentioned above.…”

Conjugated Organosilicon Materials for Organic Electronics and Photonics

“…In 1993 the evaluation of poly[(silylene)-and (disilanylene)oligothienylenes] in an OLED was started by Hadziioannou and coworkers [193]. MS6T8 used as emitter (Fig.…”

Alteration of the optical properties of poly 9,9′-dioctylfluorene by TiO2 nanocrystalline

“…PL and UV-vis spectral shifts depend strongly on conjugation length, which reflect the actual length of uninterrupted p-conjugation [14,15]. Polymer chains in pure conjugated polymer film favor a relatively less planar conformation, thus shorter conjugated length, because of the repulsion between the side-groups on the polymer chain [16].…”