![<?echo $_SERVER['SERVER_NAME'];?>](/template/twentyseventeen/skin/images/header.jpg)
 |
Recently, Jin Shengmin, a researcher of the Ultrafast Time-Resolved Spectroscopy and Dynamics Special Zone Research Group at the Dalian Institute of Chemical Physics, Chinese Academy of Sciences, has made new progress in the study of carrier kinetics in metal-organic perovskite solar cells and found that perovskite solar energy The microscopic non-uniform distribution of carrier extraction efficiency at the perovskite-electrode interface in the battery is one of the factors that limit the efficiency of the cell. Related research results have been published in "Performance Perovskite Solar Cell Performance by Heterogeneous Carrier Extraction" (Angew. Chem, German). On Int. Ed.).
In recent years, the metal organic perovskite material CH3NH3PbX3 (X=Cl, Br, I) has shown great application value in the construction of high-efficiency, low-cost solar cells and other optoelectronic devices, and has become an important international research hotspot. One of the materials. The current study generally believes that the non-uniformity of the surface morphology of the perovskite film (bump size, boundary, etc.) has a great negative impact on the photoelectric properties of the film, but its influence mechanism is not clear. Therefore, it is necessary to explore the influence of the non-uniformity of the micro-morphology of the perovskite film on the carrier lifetime, the mobility, and the battery performance to further improve the efficiency of the solar cell.
The research team used self-constructed time-resolved fluorescence scanning imaging systems to successfully achieve carrier lifetimes, carrier diffusion coefficients within and between grains, and intra-grain carrier loading on microscopic regions at the submicron spatial scale. Direct imaging measurements of the migration distance and carrier extraction efficiency of the sub-migration; Found that in the high-quality perovskite CH3NH3PbI3(Cl) polycrystalline film, the carrier diffusion rate inside the grains is very fast, and the bulk perovskite single crystal material Similarly, the carrier lifetime is longer, and the distribution between grains of different sizes and shapes is very uniform; thus, the heterogeneity of the surface morphology of the perovskite film (bump size, boundary, etc.) will be demonstrated. The deduction of the photoelectric properties of the damaged film is not completely correct. However, when the surface of the perovskite film is loaded with an electron layer and a hole transport layer, due to the defects existing at the interface between the perovskite and the electron (hole) acceptor, the carrier extraction efficiency on the surface of different crystal grains is large. The difference, this is likely to be a key factor limiting the further improvement of solar cell efficiency.
The above research work was supported by the major research plan of the Ministry of Science and Technology and the Natural Science Foundation of Liaoning Province.
Hesco Barrier(Hesco Box) unit is made of welded mesh panels which are connected with spring Wire.
Material: Low carbon steel wire(ASTM A641 Class 3), stainless steel wire
Surface treatment: Electric galvanized, Hot dip galvanized, Alu-zinc coated after welded, etc.
Wire diameter: 3mm(gauge 11), 4mm(gauge 8), 5mm(gauge 6), 6mm(gauge 4), etc
Spring wire: 3mm(gauge 11), 4mm(gauge 8), 5mm(gauge 6), 6mm(gauge 4), etc
Mesh size: 50*50mm, 75*75mm, 76.2*76.2mm, 100*100mm, etc
Geotextile: 200g/mm2, 250g/mm2, 300g/mm2
size: 7'*5'*95', 3'3"*2'6"*30', 4'6"*2'*32', 7'3"*7'*90', 2'*2`*10`, 2`*5`*32`, 7`*3`6[*18`
Hesco Barrier
High Zinc Coating Hesco Barrier,Arm Hesco Barrier,Hot Dip Galvanized Hesco Barrier,Hesco Box
Anping Deming Metal Net Co.,Ltd , https://www.wovenfence.nl