High-Performance Photodetector Based on Bandgap-Engineered MOFs/CNFs Nanocomposites for Violet Light Detection

An innovative strategy is introduced, integrating metal–organic frameworks (MOFs) and bare carbon nanofibers (CNFs) within a nanocomposite, to address the challenges related to the broad absorption spectrum of traditional photodetectors. This advancement aims to eliminate the need for additional filters or intricate surface patterning in traditional photodetectors to achieve spectral selectivity, which is associated with high costs, and to facilitate enhanced spectral selectivity in the visible range, thereby paving the way for their widespread commercial adoption. By strategically leveraging the inherent strengths of both MOFs and CNFs while addressing their individual limitations, our method not only resolves challenges related to 3D MOFs and CNFs in spectrally selective photodetection but also significantly enhances optoelectronic properties. The resulting nanocomposite exhibits spectrally selective detection of violet light in the visible range, achieving a significantly enhanced responsivity of 27 A/W, detectivity of 1.66 × 1011 Jones, and high external quantum efficiency of 8215% at a low optical power intensity of 27 μW/cm2 at room temperature. This approach holds significant promise to advance photodetection technology in various applications requiring high-performance and spectrally selective detectors.