Perylene Diimide-Based Oligomers and Polymers for Organic Optoelectronics

• DOI: 10.1021/accountsmr.1c00191
• Publication Date: 2022-02-11T20:06:05Z
• Authors: Pei Cheng; Xingang Zhao; Xiaowei Zhan
• Keywords: Diimide; HOMO/LUMO; Active layer; Organic semiconductor; Electron acceptor

ConspectusPerylene diimide (PDI) as a classical dye has some advantages, such structural diversity, tunable optical and electronic properties, strong light absorption, high electron affinity, good electron-transporting properties stability. The PDI-based oligomers polymers are candidates for n-type semiconductors in organic electronics photonic devices.A polymer solar cell (PSC) that converts sunlight into electricity is promising renewable clean energy technology superiorities, simple preparation being lightweight, low cost, semitransparent, flexible. For long time, fullerene derivatives (e.g., PCBM) have been the most important acceptors used active layer of PSCs. However, PCBM suffers from disadvantages, example, weak large amount loss, unstable morphology. Compared to PCBM, materials present advantages: intense visible-light absorption; lowest unoccupied molecular orbital (LUMO) levels can be modulated achieve suitable charge separation driving force open-circuit voltage (VOC); configuration adjusted morphology Thus, widely In addition, other devices, field-effect transistors (OFETs), light-emitting diodes, lasers, switches, photodetectors.In this Account, we brief survey developments their applications especially cells transistors. Although parent PDI dyes exhibit mobility, initial bulk-heterojunction PSCs based on yielded very power conversion efficiency (ca. 0.1%). highly planar causes intermolecular π–π stacking, crystalline domains, severe donor/acceptor (D/A) phase separation, leading exciton dissociation poor device performance. Starting 2007, our group designed linear-shaped dimers with different bridges, star-shaped trimers, overcome excess crystallization aggregation appropriate D/A miscibility separation. Molecular design strategies were developed promote planarity backbone down-shifted LUMO level polymers, which beneficial air stability OFETs. Beyond PSC OFET applications, also perovskite two-photon absorption. Future research directions toward performance optimization proposed.