Simple-structured high-performance narrow-band responsive PM-OPDs enabled by deep trap charge capturing.

Area of Science:

• Organic electronics
• Photodetector technology
• Materials science

Background:

• Organic photodetectors (OPDs) are crucial for light sensing.
• Enhancing charge trapping is key to improving OPD performance.
• Simple device structures are desirable for practical applications.

Purpose of the Study:

• To investigate the effect of HATCN dopant on F16CuPc active layers in organic photodetectors.
• To optimize HATCN concentration for enhanced device performance.
• To explore the potential of these devices for specific applications like heart rate detection.

Main Methods:

• Incorporation of HATCN dopant into the F16CuPc active layer.
• Optimization of HATCN concentration.
• Fabrication of photomultiplication organic photodetectors (PM-OPDs).
• Integration of a filter film for spectral response control.

Main Results:

• Efficient charge trapping was achieved by incorporating HATCN.
• Device efficiency was markedly enhanced by optimizing HATCN concentration.
• The optimized device demonstrated a maximum external quantum efficiency (EQE) exceeding 11,000% and a detectivity (D*) over 1.0 × 10^12 Jones.
• A narrowband spectral response with a full width at half maximum (FWHM) of 70 nm was achieved using a filter film.

Conclusions:

• HATCN doping is an effective strategy for fabricating high-performance PM-OPDs.
• Optimized PM-OPDs exhibit excellent efficiency and detectivity.
• The narrowband spectral response enables potential applications in human heart rate detection.