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One-step fabrication of effective mesoporous layer consisted of self-assembled MgO/TiO<sub>2</sub> core/shell nanoparticles for mesostructured perovskite solar cells
摘要： perovskite directly, which can not only passivate surface defects and reduce charge-suppressed J-V hysteresis. Meanwhile, the photovoltaic characteristics and the well-power conversion efficiency (PCE) was increased from 13.13% to 16.30% with well-interface and electrons transfer in PSCs. Based on the mesoporous layer consisting of nanoparticles instead of adding an additional surface modified layer for mesostructured recombination, but also facilitate charge-extraction at the mesoporous layer/perovskite perovskite solar cells (PSCs). An amorphous ultrathin outer nanolayer of MgO was Such self-assembled MgO/TiO2 core/shell nanostructures would retain the mesoporous of PSCs was 1.00 V, 4.2% higher than the uncoated TiO2 based PSCs, and the obtained structure feature, supply more contact interface of MgO/TiO2 and separate the TiO2 and conformally coated onto TiO2 core nanoparticles in a one-step bottom-up approach. proposed an efficient nanoparticulate mesoporous layer consisted of coated TiO2 optimized MgO-coated TiO2 nanoparticles, the corresponding open circuit voltage (VOC) Considering the intrinsic rich defect, poor H2O or UV light stability of TiO2, we resistance is obtained for the cell based on m-TiO2 with MgO coating. In addition, we behaved junction property were further clarified by the ideal model, a much lower series provided an easy regulated uniform coating route to fabricate well-defined core-shell nanoparticles with modified properties.
关键词： Uniform coating,mesoporous layer,Core-shell nanostructure,Perovskite solar cells
更新于2025-11-14 15:27:09
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Performance improvement of inverted perovskite solar cells using TiO2 nanorod array and mesoporous structure
摘要： In view of the low carrier mobility of organic materials, the carrier collection ability was suffered from the short transport length before carriers were recombined. To improve performances by enhancing carrier collection ability, the optimal period was 1.5 μm which was obtained by changing the period of titanium dioxide (TiO2) nanorod array in the inverted perovskite solar cells (IPSCs). The power conversion efficiency was improved to 11.96% from the 7.66% of the standard planar IPSCs. Besides, due to the inherent properties of high absorption surface area and high light scattering ability, the 150-nm-thick TiO2 mesoporous layer was embedded in the TiO2 electron transport layer. By changing the annealing temperature, the optimal crystallinity of anatase phase and the optimal porous distribution were obtained in the TiO2 mesoporous layers annealed at 500 °C for 30 min. Using the optimal annealed TiO2 mesoporous layers in the IPSCs, the power conversion efficiency was improved to 12.73%. The power conversion efficiency of 14.47% was obtained for the IPSCs embedded with the optimal 1.5-μm-periodic TiO2 nanorod array and the optimal 500 °C-annealed TiO2 mesoporous layer in the electron transport layer, simultaneously.
关键词： Nanorod array,Laser interference lithography system,Titanium dioxide material,Mesoporous layer,Inverted perovskite solar cells
更新于2025-09-16 10:30:52
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[IEEE 2018 3rd International Symposium on Instrumentation Systems, Circuits and Transducers (INSCIT) - Bento Gon?alves, Brazil (2018.8.27-2018.8.31)] 2018 3rd International Symposium on Instrumentation Systems, Circuits and Transducers (INSCIT) - Finite Element Modelling design and optimization of Love Wave mesoporous transducers for biochemical detection in liquid medium
摘要： We study numerically by a Finite Element Modeling (FEM) approach the design and the optimization of a Love wave transducer coated with a mesoporous sensitive layer. This association could allow to realize an easy functionalizable transducer for biochemical detection in liquid medium. The FEM approach is a good way to design the transducer by estimating many physical parameters in order to obtain a device which could work properly for a given application. Especially, by using a porous layer coated on an acoustic Love wave transducer, we need to be sure that the propagation parameters are still compatible with a usable device. In this paper, after a description of the reduced finite element model of the Love wave transducer, we show that the first experimental results are in a good agreement with the simulations. An “ultra-reduced” FEM approach of the Love wave transducer is carried out for easier consideration of the porous sensitive coating. Finally, experimental transducers are coated with TiO2 porous sensitive layers by the sol gel technique: the porosity is varied in the range from 10% to 25 %, the pore size from 10 nm to 200 nm, and the thickness from 100 nm to 500 nm. Simulated and experimental results are in good accordance, and allow us to conclude that such transducer could achieve a good propagation of the acoustic wave for biochemical sensing.
关键词： liquid medium,biochemical detection,SAW transducers,mesoporous layer,FEM simulation
更新于2025-09-11 14:15:04