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• W4386915930 abstract "Self-powered photodetectors (PD) based on ferroelectric materials have gained huge attention because of the spontaneous polarization and unique photovoltaic effect. However, the low photocurrent values and switch ratio of the ferroelectric materials limit their further practical applications in a wide temperature range. In this study, the self-powered ZnO nanofiber array/BaTiO3 (ZnO-NFA/BTO) PD was fabricated by high-ordered ZnO-NFA via electrospinning method deposited on a 300 nm BTO film synthesized using sol–gel method. The electrospinning can prepare ZnO-NFAs with a controllable diameter (100 nm) and orientation and is directly deposited on the quartz at a large scale, which simplifies the fabrication process. This device possesses a greater on/off ratio of 2357 at zero bias than that of BTO PD (3.33) and the ZnO-NFA PD (125) at 0.2 V. The highest responsivity and specific detectivity are 1.41 mA W–1 and 1.48 × 109 Jones at 368 nm under 0 V bias, respectively, which is enhanced about three magnitudes than the pristine BTO PD (1.21 μA W–1 and 1.02 × 109 Jones). The photocurrent of the ZnO-NFA/BTO PD strongly depends on the temperature. After the cooling system and prepolarization processing are both introduced, the largest light current (475 nA) and photovoltaic plateaus (585 nA) are enhanced by about 4417 and 4278% under 368 nm at a power intensity of 4.46 mW cm–2 at 0 °C, respectively. The enhancement of photocurrent is associated with a ferro-pyro-phototronic effect, evidenced by enhanced ferroelectric polarization. The ZnO-NFA/BTO PD can detect weak signals at low power intensity with a wide temperature range of 0–100 °C under 0 V bias. The self-powered ZnO-NFA/BTO PD provides a new and promising way to fabricate high-performance and low-cost photodetectors from inorganic perovskite materials." @default.
• W4386915930 created "2023-09-22" @default.
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• W4386915930 date "2023-09-21" @default.
• W4386915930 modified "2023-10-06" @default.
• W4386915930 title "Pyro-Phototronic Effect-Enhanced Photocurrent of a Self-Powered Photodetector Based on ZnO Nanofiber Arrays/BaTiO₃ Films" @default.
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• W4386915930 doi "https://doi.org/10.1021/acsami.3c08880" @default.
• W4386915930 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/37733942" @default.
• W4386915930 hasPublicationYear "2023" @default.
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