Constructing Ultra-High Current Direct-Current Tribo-Photovoltaic Nanogenerators via Cu/Perovskite Schottky Junction.
basic_science · Level V
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- Record sourced from PubMed, PMID 39658944.
- Also identified by DOI 10.1021/acsnano.4c11758.
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Abstract
Perovskite-based direct-current triboelectric nanogenerators (DC-TENGs) leveraging the tribo-photovoltaic effect have garnered significant attention for their ability to simultaneously harvest mechanical and solar energy, effectively enhancing the output performance of DC-TENGs. Herein, we innovatively construct a rolling-mode Cu/ternary cation perovskite (FA<sub>0.945</sub>MA<sub>0.025</sub>Cs<sub>0.03</sub>Pb(I<sub>0.975</sub>Br<sub>0.025</sub>)<sub>3</sub>) Schottky junction DC-TENGs with ultrahigh current output and excellent operational stability. The Cu/perovskite Schottky junction ensures the formation of an internal electric field, promoting carrier separation and directional movement for a stable DC output. Under AM 1.5 G illumination, the DC-TENG achieves a short-circuit current (<i>I</i><sub>sc</sub>) and current density of 408 μA and 27.2 A/m<sup>2</sup>, respectively, marking a 119 times increase as compared to dark conditions and the highest reported <i>I</i><sub>sc</sub> for perovskite DC-TENGs. With over 30 min of operation, the current output remains stable. The DC-TENGs exhibit promising applications in temperature and humidity sensing and self-powered photodetection. Furthermore, by adjusting the light power density, the optimal internal output impedance of DC-TENGs can be tuned broadly from 0.9 to 132 kΩ, offering great potential for impedance matching in self-powered microelectronic components. This research provides insights into the development of multifunctional DC-TENG devices with coupled mechanical and solar energy, expanding the application scope of perovskite materials and devices.