Amino-Functionalized Graphdiyne Derivative as a Cathode Interface Layer with High Thickness Tolerance for Highly...

Area of Science:

• Materials Science
• Organic Electronics
• Nanotechnology

Background:

• Efficient cathode interfacial materials (CIMs) are crucial for optimizing organic solar cell (OSC) performance.
• A scarcity of high-performance CIM candidates limits advancements in OSC technology.

Purpose of the Study:

• To develop a novel, highly efficient, and versatile CIM for OSCs.
• To explore the potential of graphdiyne (GDY) derivatives as CIMs with enhanced properties.

Main Methods:

• Synthesis of an amino-functionalized graphdiyne derivative (GDY-N) with alcohol solubility.
• Fabrication and characterization of OSC devices utilizing GDY-N as the CIM.
• Performance evaluation including power conversion efficiency (PCE) and thickness tolerance.

Main Results:

• Achieved a champion PCE of 19.30% (certified 19.05%) in D18-Cl:L8-BO based OSCs.
• Demonstrated remarkable thickness insensitivity, retaining 95% efficiency at 25 nm film thickness.
• Exhibited wide universality and exceptional operational stability in OSC devices.

Conclusions:

• GDY-N is the first GDY derivative with favorable alcohol solubility, serving as a high-performance CIM for OSCs.
• GDY-N-based OSCs show significant thickness tolerance and stability, broadening the applicability of GDY derivatives.
• This work expands the library of GDY derivatives and validates their potential as advanced CIMs in organic electronics.