Polymer semiconductor has been widely concerned because of its advantages such as easy to adjust structure and large area solution processing,which can meet the needs of light,thin,soft and transparent flexible electrons.Spiro-fluorenexanthene,as an important functional block of wide-band gap blue light materials,which is often used to construct polymer semiconductors with excellent photoelectric properties and device stability.However,the construction of flexible spiro-fluorenexanthene polymers has rarely been reported.Based on this,this paper reports the efficient synthesis of single/parallel spiro-fluorenexanthene monomers and their blue light-emitting polymers,which include homopolymer PC8SFX-Homo,PDSFX-Homo and copolymers PC8SFX-Co and PDSFX-Co.The parallel spiro-fluorenexanthene polymer(PLQYsol=88.2％,EQEmax=0.52％)is significantly superior to the single spiro-fluorenexanthene system(PLQYsol=11.1％EQEmax=0.17％)in terms of luminous efficiency and flexible device performance.Moreover,the parallel spiro-fluorenexanthene polymer exhibit lower internal stresses.At the same time,introducing the flexible chain segment copolymerization through the main chain flexibility strategy can obtain better flexibility and performance of flexible LED devices.This work provides a new idea for the construction of wide-band gap deep blue light-emitting polymer for the application of flexible electronic and flexible light-emitting display devices.
维普
万方数据