Showing papers by "Jianming Lin published in 2019"
TL;DR: In this article, the authors reported the preparation of reduced graphene oxide decorated NiSe2 nanoparticles (N-rGO/NiSe2) in the presence of different amount of graphene oxide reactant by a simple two-step process.
183 citations
TL;DR: In this article, NiMoO4/NiO nanoflowers material with a high specific surface area grown on a nickel foam conductive substrate is successfully synthesized via a facile and efficient method, which exhibits an excellent capacitance of 10.3
82 citations
TL;DR: In this article, rare-earth doped upconversion nanoparticles with core-shell structure are synthesized for enhancing the performance of perovskite solar cells, which can be used as spectral conversion materials.
61 citations
TL;DR: In this article, the superior Fe3O4/reduced graphene oxide (rGO) composite has been synthesized by a facile one-step solvothermal method.
41 citations
TL;DR: In this paper, an asymmetric supercapacitor was fabricated using NiSe/Ni3S2 electrode and AC electrode as positive electrode and negative electrode, respectively, which exhibited excellent electrochemical properties, with a high specific capacitance of 8.81 F cm−2.
Abstract: NiSe rods coated with cotton-like Ni3S2 were directly grown on nickel foam through a two-step process, comprising selenization and electrodeposition. The as-obtained NiSe/Ni3S2 composite electrode exhibited excellent electrochemical properties, with a high specific capacitance of 8.81 F cm−2 (1259.3 F g−1) at a current density of 4 mA cm−2, which was better than the value of pure NiSe electrode (5.17 F cm−2; 861.8 F g−1) at the same current density. Moreover, an asymmetric supercapacitor (ASC) was fabricated using NiSe/Ni3S2 electrode and AC electrode as positive electrode and negative electrode, respectively. This ASC extended the potential window to 1.6 V and was possessed of a superior energy density of 38.7 W h kg−1 at a power density of 192 W kg−1, with outstanding cycling stability (85.9% retention after 10 000 cycles).
39 citations
TL;DR: In this article, the down-conversion nanocrystals film made of europium-doped sodium yttrium fluoride was deposited on the nonconducting side of the conducting glass.
Abstract: Perovskite solar cells assembled with titanium dioxide electron transport layer exhibited brilliant photovoltaic properties due to titanium dioxide having a high electron mobility, appropriate energy level alignment and easy fabrication procedure. However, inherent instability exists in titanium dioxide-based perovskite solar cells because of the ultraviolet photocatalytic activity of titanium dioxide. This results in recombination at the interface of titanium dioxide/perovskite. In this report, the down-conversion nanocrystals film made of europium-doped sodium yttrium fluoride was deposited on the non-conducting side of the conducting glass. The down-conversion nanocrystal layer could absorb high energy ultraviolet photons and converted them to visible light. The layer not only extended the spectral response range for perovskite solar cells but also alleviated the photocatalytic activity of titanium dioxide. The perovskite solar cells with the down-conversion nanocrystals film generated average power conversion efficiency yield of 19.99%, which is much better than that of the device without the down-conversion nanocrystals film (16.99%). The best power conversion efficiency for the device with the down-conversion nanocrystals film was 20.17%. In addition, perovskite solar cells with the down-conversion nanocrystals film showed a small hysteresis.
36 citations
29 Oct 2019
TL;DR: The investigation demonstrates that the rare-earth doping is low-cost and effective method to improve the photovoltaic performance of SnO2-based PSCs.
Abstract: Tin oxide (SnO2), as electron transport material to substitute titanium oxide (TiO2) in perovskite solar cells (PSCs), has aroused wide interests. However, the performance of the PSCs based on SnO2 is still hard to compete with the TiO2-based devices. Herein, a novel strategy is designed to enhance the photovoltaic performance and long-term stability of PSCs by integrating rare-earth ions Ln3+ (Sc3+, Y3+, La3+) with SnO2 nanospheres as mesoporous scaffold. The doping of Ln promotes the formation of dense and large-sized perovskite crystals, which facilitate interfacial contact of electron transport layer/perovskite layer and improve charge transport dynamics. Ln dopant optimizes the energy level of perovskite layer, reduces the charge transport resistance, and mitigates the trap state density. As a result, the optimized mesoporous PSC achieves a champion power conversion efficiency (PCE) of 20.63% without hysteresis, while the undoped PSC obtains an efficiency of 19.01%. The investigation demonstrates that the rare-earth doping is low-cost and effective method to improve the photovoltaic performance of SnO2-based PSCs.
35 citations
TL;DR: In this article, NiTe:Co nanoparticles supported on nickel foam are successfully synthesized using one step hydrothermal method, and the performance of NiTe nanoparticles in 3'M KOH is investigated.
31 citations
TL;DR: In this article, an efficient interlayer between TiO2 electron-transporting layer and perovskite light-absorption layer was developed as an efficient interfacial material for planar perovsite solar cells.
11 citations