At NINGBO INNO PHARMCHEM CO.,LTD., we are dedicated to advancing the field of organic solar cells (OSCs) through innovative material science. A critical aspect of OSC performance is the efficient separation and extraction of photogenerated charge carriers. This process is heavily influenced by the materials used at the interfaces within the device, particularly the cathode interfacial layer (CIL).

Recent research has underscored the significant impact of advanced CILs, like the phenanthroline-carbolong derivatives developed by our partners and that we help distribute, on charge dynamics. Specifically, materials such as DPC have shown remarkable synergistic effects that enhance both charge extraction and overall device efficiency. These materials are engineered at the molecular level to optimize energy level alignment and conductivity.

The DPC material, for instance, exhibits a favorable LUMO energy level that is more closely matched with the acceptor's LUMO, facilitating a smoother pathway for electron transport to the cathode. This improved energy landscape, coupled with the material's inherent conductivity, leads to more efficient charge extraction. Evidence of this is seen in the reduced PL quenching efficiency observed when DPC is used as a capping layer on the active blend, indicating that charges are being effectively transferred away from the excited state.

Furthermore, analyses of the photocurrent-voltage (J-V) characteristics and charge collection efficiency (ηc) reveal that DPC-based devices achieve near-unity charge collection, signifying minimal recombination losses. The high ideality factor (α close to 1) in light intensity-dependent measurements further supports the suppression of bimolecular recombination, a common loss mechanism in OSCs. These factors collectively contribute to higher short-circuit currents (JSC) and fill factors (FF), ultimately boosting the overall PCE. NINGBO INNO PHARMCHEM CO.,LTD. is proud to be part of this progress, providing the essential materials that drive these synergistic improvements in organic solar cell technology.