Improved Transistor Performance of Isoindigo-Based Conjugated Polymers by Chemically Blending Strongly Electron-Deficient Units with Low Content To Optimize Crystal Structure

Conjugated polymers have received tremendous attention because of their potential application in flexible electronic devices. In addition to synthesizing new conjugated polymers, different methods have been used to improve charge carrier transport. The simple random polymer strategy was used to enhance the charge carrier mobility of isoindigo (ID)-based conjugated polymers by chemically blending a small amount of strongly electron-deficient bis(2-oxoindolin-3-ylidene)benzodifurandione (BIBDF) units. In comparison with a parent polymer (P0) without BIBDF in its polymer backbone, the hole mobilities of random polymers were remarkably enhanced by the chemical blending of BIBDF with low content (