Construction of organic optoelectronic materials by using polyhedral oligomeric Silsesquioxanes (POSS)

This chapter summarizes polyhedral oligomeric silsesquioxanes (POSS)-based organic optoelectronic materials for various applications, particularly in the area of electroluminescent materials, electrochromic devices, and other important applications such as liquid crystal display and sensor. POSS helps to reduce the aggregation of chromophores, which result in quenching the fluorescence. Using the similar strategy, POSS-assisted quantum confinement effect was proposed for organic photoluminescent materials and synthesized organic quantum dots cluster materials where POSS were used to spatially isolate the small organic molecules. The ratio of the POSS core with the chromophores also affects the device performance. Hydrosilylation approach was also used to anchor the chromophore part onto the POSS that has been disclosed by Lee, Mochizuki, and Jabbour group. Besides the improvement of optical contrast and switching time, the electrochemical stability of POSS- polyaniline (PANI) is also significantly higher than that of pristine PANI.