Consumption of fossil fuel has led to serious environmental pollution, and an urgent demand for solar energy. Perovskite solar cell(PSC) is a device that converts solar energy into electricity. It is cost effective an...Consumption of fossil fuel has led to serious environmental pollution, and an urgent demand for solar energy. Perovskite solar cell(PSC) is a device that converts solar energy into electricity. It is cost effective and power efficient, which has attracted much attention. However, PSC shows low absorptivity due to the limited thickness of the active layer. In this paper, a bilateral L-shaped metal grating structure is introduced into the PSC to enhance the absorptivity of the active layer by the surface plasmon effect between the metaling grating and the TiO2. With the deflection angle of the inner angle connection line of the metal grating is 45°, the inner angle distance is 100 nm, and the structural period is 250 nm, the absorptivity of the active layer of the PSC is 86.5% at 715 nm, which is 28.6% higher than the conventional solar cell at the same wavelength. Such results provide an effective way to improve the absorption of PSCs.展开更多
We proposed a compact and tunable multimode interferometer(MMI)based on an asymmetric wavy fiber(AMWF),which has axial offset,off-center taper waist,and micro-length.The fabrication process only contains non-axis pull...We proposed a compact and tunable multimode interferometer(MMI)based on an asymmetric wavy fiber(AMWF),which has axial offset,off-center taper waist,and micro-length.The fabrication process only contains non-axis pulling processes of single-mode fiber on two close positions.Theoretical qualitative analyses and experiments verify the tunable multimode propagation of the AMWF.Experimental results show a nonlinear wavelength response with increasing axis displacement from 0 to 120μm.In the range of 0—10μm,the sensitivity reaches the highest value of-1.33 nm/μm.Owing to its cost-effective,high-compact and tunable multimode propagation properties,the AMWF provides a promising platform for micro-nano photonic devices and optical sensing applications.展开更多
基金supported by the National Key R&D Program of China (No.2021YFB3200100)the Key R&D Project of Datong City (No.2020019)the Special Project of Shanxi Datong University (Nos.2020YCZX002, 2020YCZX004, and 2020YCZX007)。
文摘Consumption of fossil fuel has led to serious environmental pollution, and an urgent demand for solar energy. Perovskite solar cell(PSC) is a device that converts solar energy into electricity. It is cost effective and power efficient, which has attracted much attention. However, PSC shows low absorptivity due to the limited thickness of the active layer. In this paper, a bilateral L-shaped metal grating structure is introduced into the PSC to enhance the absorptivity of the active layer by the surface plasmon effect between the metaling grating and the TiO2. With the deflection angle of the inner angle connection line of the metal grating is 45°, the inner angle distance is 100 nm, and the structural period is 250 nm, the absorptivity of the active layer of the PSC is 86.5% at 715 nm, which is 28.6% higher than the conventional solar cell at the same wavelength. Such results provide an effective way to improve the absorption of PSCs.
基金supported by the National Key Research and Development Program of China(No.2017YFB0405600)the National Natural Science Foundation of China(Nos.62001326,61274113 and 61404091)+2 种基金the Natural Science Foundation of Tianjin City(Nos.18JCYBJC85700 and 18JCZDJC30500)the Open Project of State Key Laboratory of Functional Materials for Information(No.SKL202007)the Science and Technology Planning Project of Tianjin City(No.20ZYQCGX00070)。
文摘We proposed a compact and tunable multimode interferometer(MMI)based on an asymmetric wavy fiber(AMWF),which has axial offset,off-center taper waist,and micro-length.The fabrication process only contains non-axis pulling processes of single-mode fiber on two close positions.Theoretical qualitative analyses and experiments verify the tunable multimode propagation of the AMWF.Experimental results show a nonlinear wavelength response with increasing axis displacement from 0 to 120μm.In the range of 0—10μm,the sensitivity reaches the highest value of-1.33 nm/μm.Owing to its cost-effective,high-compact and tunable multimode propagation properties,the AMWF provides a promising platform for micro-nano photonic devices and optical sensing applications.
