# Design of High‐Performance Organic Semiconductors by Intra‐ and Intermolecular Charge Transfer Interaction

## TL;DR

Researchers designed high-performance organic semiconductors using charge transfer interactions, achieving notable conductivity and energy storage properties.

## Contribution

The study introduces π-conjugated CT complexes with stable intra- and intermolecular charge transfer mechanisms for improved energy storage.

## Key findings

- The 200%TCNQ@Sq-1,6Py complex achieved an electrical conductivity of 8.7 × 10−2 S cm−1 at room temperature.
- The composite with polyaniline reached a specific capacitance of 968.7 F g−1 and retained 70% capacitance after 1000 cycles.

## Abstract

Charge transfer (CT) interactions have rarely been used to organize supramolecules and cross‐linked objects. However, the ever‐increasing understanding of CT interactions opens up new avenues for the design of innovative materials with tailored electronic properties. Herein, several molar ratios of highly crystalline π‐conjugated n%TCNQ@Sq‐1,6Py oligomers (n equal molar ratio of tetracyanoquinodimethane (TCNQ) to 1,6‐diaminopyrene (1,6Py) moiety) with simultaneously stable intra‐ and intermolecular CT mechanisms are prepared. As a result, the π‐conjugated 200%TCNQ@Sq‐1,6Py CT complex indicates stable intra‐ and intermolecular CT interactions resulting in extremely high electrical conductivity of 8.7 × 10−2 S cm−1 at room temperature, a charge‐distance capacitance of 70.62 F g−1 at the current density of 0.625 A g−1 which significantly increases to 968.7 F g−1 by doping of polyaniline (PANI) at a current density of 0.312 A g−1. Finally, it exhibits a capacitance retention of 70% of the initial specific capacitance after 1000 cycles at room temperature. This type of π‐conjugated oligomer CT complex can be used to improve existing CT‐based energy storage devices, such as capacitors.

Here, π‐conjugated CT complexes are reported with stable inter‐intramolecular CT natures, including n%TCNQ@Sq‐1,6Py and 200%TCNQ@Sq‐1,6Py/PANI composite. The 200%TCNQ@Sq‐1,6Py and 200%TCNQ@Sq‐1,6Py/PANI indicate considerable electrical conductivity of 8.7 × 10−2 S cm−1 and high specific capacitance of 968.7 F g−¹, respectively, compared to the recent literature with a capacitance retention of 70%.© 2025 WILEY‐VCH GmbH