Molecular Design and Ordering Effects in π-Functional Materials for Transistor and Solar Cell Applications

TLDR

Organic electronics are expected to transform flexible thin‑film device technologies, with solution‑processable π‑conjugated polymers and small molecules showing particular promise for field‑effect transistors and bulk heterojunction solar cells. This Perspective critically examines recent strategies for designing and structurally organizing π‑functional materials to enhance transistor and solar‑cell performance, guiding future advances. The discussion emphasizes how molecular structure, self‑assembly, and nanoscale to mesoscale ordering influence device efficiency.

Abstract

Organic electronics are broadly anticipated to impact the development of flexible thin-film device technologies. Among these, solution-processable π-conjugated polymers and small molecules are proving particularly promising in field-effect transistors and bulk heterojunction solar cells. This Perspective analyzes some of the most exciting strategies recently suggested in the design and structural organization of π-functional materials for transistor and solar cell applications. Emphasis is placed on the interplay between molecular structure, self-assembling properties, nanoscale and mesoscale ordering, and device efficiency parameters. A critical look at the various approaches used to optimize both materials and device performance is provided to assist in the identification of new directions and further advances.