| Zugriffsnummer | 48730 |
| Dokumenttyp | Zeitschriftenartikel |
| Peer Review | mit Peer Review |
| Sprache | Englisch |
| Titel | Record-high responsivity and high detectivity broadband photodetectors based on upconversion/gold/prussian-blue nanocomposite |
| Autor(in); Institution |
Gupta, Akash; School of Chemical Engineering, Chonnam National University, Gwangju, SOUTH KOREA
Lee, Song Yeul; Chonnam National University, School of Chemical Engineering, Gwangju, SOUTH KOREA
Rigosi, Albert F.; National Institute of Standards and Technology (NIST), Physical Measurement Laboratory, Gaithersburg, Md., USA
Elmquist, Randolph E.; National Institute of Standards and Technology (NIST), Physical Measurement Laboratory, Gaithersburg, Md., USA
Adusumalli, Venkata N. K. B.; Chonnam National University, School of Chemical Engineering, Gwangju, SOUTH KOREA
Liang, Chi-Te; National Taiwan University, Department of Physics, Taipei, TAIWAN
Park, Yong Il; Chonnam National University, School of Chemical Engineering, Gwangju, SOUTH KOREA
|
| Quelle/Jahr | Advanced Functional Materials: 32 (2022), 44, 1 - 13 |
| Artikelnummer | 2206496 |
| ISSN | 1616-301X (PRINT) ; 1616-3028 (ONLINE) |
| DOI | |
| Verlag | Weinheim: Wiley-VCH |
| Zusammenfassung | The development of high-quality and strongly Au conjugated upconversion nanoparticles (UCNPs) is time-consuming and requires specific chemicals. Therefore, a one-pot hydrothermal method is adopted for novel in situ preparation of UCNP@Au composites using a binary functional ethylenediaminetetraacetic salt, which is employed as a surfactant and reducing agent. The composites are electrostatically conjugated with metal-coordinated Prussian blue (PB) to yield UCNP@Au+PB nanocomposites (NCs), which demonstrate 21-fold upconversion emission quenching by fluorescence resonance energy transfer compared to UCNPs. Additionally, the PB, UCNP@Au, and NCs demonstrate a synergistically reduced trap (α ≈ 0.85) and enhance ultrasensitive broadband (432-980 nm) photodetection. The NCs-based gate-free epitaxial graphene device demonstrates excellent high photoresponsivity (5.9 × 105 A W-1), detectivity (2.17 × 1014 ), and normalized gain (2.06 × 10-4 m2 V-1) at 318 nW cm-2 (532 nm) and a bias voltage of 1 V. The Au plasmons enhance the one-photon-enabled visible absorption of Er3+ ions, and PB exhibits broad absorption and enhances the carrier density of the device, resulting in an ultrahigh photoresponse. The obtained device performance is the highest to date among their class of nanohybrids. Also, these NCs can readily detect polychromatic light and signals from daily-use appliances, indicating their potential for applications in consumer electronics. |
| Themenbereich der Metrologie | Elektrizität und Magnetismus |
Zitierung
Gupta, A., Patel, D. K., Lee, S. Y., Rigosi, A. F., Elmquist, R. E., Adusumalli, V. N. K. B., Liang, C.-T., & Park, Y. I. (2022). Record-high responsivity and high detectivity broadband photodetectors based on upconversion/gold/prussian-blue nanocomposite. Advanced Functional Materials, 32(44), 1–13. https://doi.org/10.1002/adfm.202206496