Organic Semiconductor Materials and Electronic Properties

Organic semiconductors encompass a class of carbon-based materials whose π-conjugated frameworks enable the transport of charge carriers under an applied electric field. These materials range from small aromatic molecules to extended polymer chains, offering tunable electronic properties by chemical design. Key performance metrics include charge-carrier mobility, energy-level alignment, and environmental stability, all of which depend on molecular structure, solid-state packing and intermolecular interactions. Advances in crystal engineering, computational prediction and synthetic methodology have driven improvements in mobility and operational lifetime, while solution processability supports low-cost fabrication techniques such as inkjet printing and roll-to-roll coating. Applications span organic field-effect transistors, light-emitting diodes, photovoltaic cells and bioelectronic interfaces. Current research addresses persistent challenges in balancing high mobility with ambient stability, optimising energy-level offsets for efficient charge injection and refining nanostructured morphologies to enhance charge percolation. Interdisciplinary efforts that link molecular design to device architecture continue to underpin progress towards commercially viable organic electronic technologies with the promise of flexible, lightweight and large-area applications.

Research from Nature Portfolio

Recent studies have demonstrated the design of a nonacene-like molecule exhibiting exceptional ambient stability and robust π-conjugation, enabling dynamic modulation of optical and electrical behaviour across ultraviolet to near-infrared wavelengths. This multifunctional system is processed by simple benchtop methods into actuator-type devices that combine self-repair capabilities with competitive charge-transport characteristics. By integrating discrete molecular units into reconfigurable soft actuators, these materials achieve autonomous adaptation of photonic response, opening avenues for adaptive camouflage, sensing and energy-efficient display technologies.

Organic Semiconductor Materials and Electronic Properties publication trend

The graph below shows the total number of articles in organic semiconductor materials and electronic properties across all publications each year (not limited to Nature Index journals).

Technical terms

Organic semiconductor: A carbon-based material whose conjugated molecular orbitals allow the conduction of electrons or holes.

π-conjugation: Overlap of adjacent p-orbitals in a molecule, enabling delocalisation of electrons across a chain of atoms.

Charge-carrier mobility: A measure of how rapidly electrons or holes traverse a material under an electric field.

HOMO–LUMO gap: Energy difference between the highest occupied and lowest unoccupied molecular orbitals, dictating optical absorption and charge-injection barriers.

Crystal engineering: The design and control of molecular packing motifs to achieve desired material properties.

Field-effect transistor (FET): A device in which an electric field applied via a gate electrode modulates the conductivity of a semiconductor channel.

References

1. Octopus-inspired deception and signaling systems from an exceptionally-stable acene variant. Nature Communications (2023).
2. Predicted energy–structure–function maps for the evaluation of small molecule organic semiconductors. Journal of Materials Chemistry C (2017).
3. Computationally aided design of a high-performance organic semiconductor: the development of a universal crystal engineering core. Chemical Science (2019).
4. A novel angularly fused bistetracene: facile synthesis, crystal packing and single-crystal field effect transistors. Journal of Materials Chemistry C (2017).