期刊
NANO ENERGY
卷 84, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.nanoen.2021.105899
关键词
Perovskite; Two-dimensional; Heterostructure; Piezo-electric; Piezo-phototronic; Compressive pressure
类别
资金
- National Research Foundation of Korea (NRF) - Ministry of Science, ICT & Future Planning [2020R1A2C2004376]
- National Research Foundation of Korea [2020R1A2C2004376] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Dimensionally-engineered perovskite heterostructures enhance the stability and efficiency of perovskite solar cells, showing piezoelectric and phototronic effects under various pressures. The 2D|3D heterostructure exhibits strong performance and endurance properties, suggesting a promising way to improve perovskite-based electronic and optoelectronic devices.
Dimensionally-engineered perovskite heterostructures are highly attractive, as recently shown to be useful for enhancing the stability and efficiency in perovskite solar cells. Here, we first report piezo-electric and -phototronic effects found in two-dimensional (2D)|3D perovskite heterostructures under various pressures. The piezoelectric and -phototronic effects are strongly enhanced by employing 2D|3D heterostructure instead of a 3D single layer in the perovskite devices, which is believed to be due to energy-band modulation and bandmisalignment lessening by piezoelectrically-polarized charges induced under moderate compressive pressure. Furthermore, the perovskite 2D|3D piezo-electric and -phototronic device shows only a 29% reduction of its initial performance even under 30-days atmospheric conditions and almost perfect endurance properties. These results suggest that dimensionally-engineered perovskite heterostructures may provide a fundamentally good way to improve perovskite-based electronic and optoelectronic devices.
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