Synthesis of lightweight N-doped graphene foams with open reticular structure for high-efficiency electromagnetic wave absorption

Cu2O is one of the attractive photovoltaic materials for solar cells because of its low cost, nontoxicity, and good mobility. In this paper, an obvious enhancement of power conversion efficiency (PCE) for ZnO/Cu2O solar cells with perfectly oriented and micrometer grain sized Cu2O films was experimentally demonstrated. Cu2O was fabricated using radical oxidation of Cu foils at a low temperature of 500 °C. When followed by a rapid quenching and post annealing treatment, the perfectly oriented and micrometer sized Cu2O crystals (3∼4 μm) could be obtained. The crystal structure and optical properties of Cu2O were investigated in detail. Compared to conventional solar cells without any treatment, the PCE of the solar cells based on Cu2O with treatment was 3.18%, corresponding to a significant PCE improvement of 60.6%.

Efficiency enhancement of ZnO/Cu2O solar cells with well oriented and micrometer grain sized Cu2O films

Hybrid network structure of boron nitride and graphene oxide in shape-stabilized composite phase change materials with enhanced thermal conductivity and light-to-electric energy conversion capability

Facile synthesis of super-hydrophobic, electrically conductive and mechanically flexible functionalized graphene nanoribbon/polyurethane sponge for efficient oil/water separation at static and dynamic states

ZIF-8-modified MnFe2O4 with high crystallinity and superior photo-Fenton catalytic activity by Zn-O-Fe structure for TC degradation

A significant enhancement of photoresponse from the light-controlled conductive switching based on Cu2O/rGO nanocomposites was experimentally demonstrated. Cu2O/rGO nanocomposites were synthesized via a facile wet-reduced method. The crystalline structure, morphologies, and photoluminescence of the Cu2O/rGO nanocomposites were characterized and analyzed. The fabricated conductive switching was measured under the irradiation of a continuous laser. When the laser was turned on and off alternately, the photoconductive switching obviously displayed a state conversion between “on” and “off” reversibly. Furthermore, the typical current–voltage (I–V) and current–time (I–t) curves exhibited a relatively high switching ratio (Ion/Ioff) of 3.25 and a fast response time of 0.45 s. The excellent “on–off” characteristics of the device show promising applications in memory storage and logic circuits.

Enhanced performance of light-controlled conductive switching in hybrid cuprous oxide/reduced graphene oxide (Cu 2 O/rGO) nanocomposites

Efficient charge carrier separation and excellent visible light photoresponse in Cu2O nanowires

The invention relates to a cuprous oxide/reduced graphene oxide nanowire composite material and a preparation method and an application thereof, and belongs to the technical field of nano materials. The method comprises the following steps of taking copper salt, and 3, 4, 9,10-perylene tetracarboxylic dianhydride and graphene oxide as raw materials, adding a reducing agent, and preparing the cuprous oxide/reduced graphene oxide nanowire composite material through a hydrothermal method, wherein cuprous oxide in the finally prepared composite material is nanowire-shaped by reasonably controllingthe dosages of copper salt and 3, 4, 9,10-perylene tetracarboxylic dianhydride and the type of the reducing agent. A photoelectric response device constructed by the composite material has high response characteristics, the switch ratio (the ratio of a light current to a dark current) reaches 5.80, the response time is fast, the rising time is about 0.55s, and the declining time is about 0.45s;and the composite material has a wide application prospect in the photoelectric response device, and a new idea is provided for designing a novel photoelectric response device.

Cuprous oxide/reduced graphene oxide nanowire composite material and preparation method and application thereof

The invention discloses a preparation method of a cuprous oxide-based multi-lamination heterojunction solar cell device. The cell comprises a glass substrate, a N-Na-codoped Cu2O film layer formed on one side of the glass substrate, a AgInZnS quantum dot layer formed on the N-Na-codoped Cu2O film layer, a ZnO transparent layer formed on the AgInZnS quantum dot layer, a cathode located on the ZnO transparent layer and an anode located on the N-Na-codoped Cu2O film layer. According to the method, AgInZnS quantum dots are used as a middle layer material of the ZnO-Cu2O heterojunction cell, the spectrum absorption range is widened, and light absorption and conversion can be expected to be enhanced; meanwhile, the AgInZnS quantum dots can regulate matching among energy levels of all the materials, accelerate separation of electrons and holes and improve the photoelectric conversion efficiency of the cell.

Cuprous oxide-based multi-lamination heterojunction solar cell and preparation method thereof

The invention discloses a GaN-based LED. A ZnO film is plated on the light emitting surface of a conventional LED, and since the pattern refractive index of ZnO is about 2.0, which ranges from the refractive index of air and the refractive index of GaN, light emitted from an active layer can be emitted more easily. According to the invention, the light extraction efficiency of the LED is substantially improved through simultaneous adoption of surface coarsening and micropore patterns with preparation periodical structural arrangement. The invention also discloses a preparation method of the structure of the GaN-based LED.

Wei Jing

Papers

Enhanced performance of light-controlled conductive switching in hybrid cuprous oxide/reduced graphene oxide (Cu 2 O/rGO) nanocomposites

Efficient charge carrier separation and excellent visible light photoresponse in Cu2O nanowires

Cuprous oxide/reduced graphene oxide nanowire composite material and preparation method and application thereof

Cuprous oxide-based multi-lamination heterojunction solar cell and preparation method thereof

GaN-based LED and preparation method thereof