The "Science" magazine published on July 18th published a full-print mesoscopic perovskite solar cell funded by the Han Hongwei Task Force of Huazhong University of Science and Technology under the funding of the National Natural Science Foundation of China's Youth Fund (project number 61106056). New results of research. Making full use of solar energy is the fundamental way to solve the current human energy shortages and environmental pollution. As a representative of the third generation solar cells, new mesoscopic solar cells based on mesoscale-based inorganic or organic semiconductor materials and three-dimensional interpenetrating network structures have attracted the attention of scientific researchers in various countries because they are expected to achieve low-cost energy. Especially in the past two years, with the application of perovskite materials such as MAPbI3 (lead dimethylamine), this mesoscopic solar cell has developed at an extraordinary speed, and the photoelectric conversion efficiency has rapidly risen from 3.8% to 17.9%. Good application prospects. Unfortunately, the organic hole transport material and gold counter electrode used in solar cells with this efficiency are not only expensive (it is reported that the price of the organic hole transport material spiro-OMeTAD is 10 times that of gold or platinum), and it needs to be high. Vacuum and other high-energy processing processes. Therefore, how to achieve an all-solid-state mesoscopic solar cell with high efficiency and stability under low-cost conditions is still a key issue for large-scale solar energy applications. Drawing on the development of perovskite solar cells, Han Hongwei's research group developed a mixed cationic perovskite material (5-AVA) x (MA)(1-x)PbI3 (lead iodide methylamine-5-amino group) by introducing amphipathic molecules. Valeric acid) and its application in no-hole transport material printable mesoscopic solar cells. The feature is that a titania nanocrystalline film, a zirconia insulating layer and a carbon counter electrode layer are coated on a single conductive substrate by a layer-by-layer printing method, and then filled with a perovskite material. This key technology enables a perfect combination of low cost and continuous production processes for mesoscopic solar cells. The results show that the application of this new material not only obtained a photoelectric conversion efficiency of 12.84%, but also showed good repeatability and stability. The photoelectric conversion efficiency was certified by the independent photovoltaic laboratory of Newport Corporation in the United States, which is the highest efficiency of the current perovskite-based solar cells without hole-transport materials. The full-print mesoscopic solar cell developed by Han Hongwei's research group has adapted to the photovoltaic industry's demand for cheap solar cells. Reviewers commented that this breakthrough research result will have a huge impact on the future development of solar cells.
Sectional Door Accessories: motor 220V-380V, control box, spring break device, cable break device , aluminum alloy rope pulley, enhanced shaft bracket, air bag system, duplex enhanced guide wheel bracket.
Detail introduction for above main accessories
1.Motor and controller:
The garage door operator is designed for residential overhead sectional and tilt doors.
The operator memorizes the limit positions and unique braking system that slows the unit down at the end of its travel.
Rolling code remote control with max. 20 pcs hand transmitters.
The operator is equipped with a manual release lever which allows manual operation of the door in case of power failure.
The controller has a security LOCK function which prevents operation of the door from transmitter.
2.spring break device:
Sectional doors are hinged and they bend in the tracks as the door opens and closes. Many of these doors are counterbalanced with extension springs, also designated "stretch springs," and they have seven characteristics. The length is the measurement of all the coils pressed together. This, along with the inside diameter of the coils and wire size - the thickness of the wire from which the springs are made - determine the stretch, the distance the spring is extended - normally half the door height, and pull, the force the spring pulls when stretched its normal length. The type of ends determine how the ends of the spring are mounted. The initial tension is the percentage of pull needed to separate the coils. This is determined by the pitch with which the springs are wound. On sectional garage door springs this is normally 15 percent. For example a 100 pound pull spring requires 15 pounds of weight to separate the coils; when a door is open the two springs will support 15 pounds of door weight without any stretch.
Most extension springs are made of oil tempered wire. These are normally coated or painted. Some springs are made of galvanized wire.
3.able break device:
cable break device ,door hardware
adjustable bottom bracket .
the raw material hot plate
zinc plated
safety device
adjustable bottom bracket
the raw material hot plate
zinc plating
spring safety device ,2" and 3" safety device
once the cable is broken ,this devoice can keep the hurt away from the door falling
4.aluminum alloy rope pulley
Equipment: CNC stamping/punching machine, CNC bending machine, CNC cutting
machine, 5~250 tons punching machines, welding machine, polish machines...
Processed material: stainless steel: copper, carbon steel
Surface treatment: Hot galvanized, polishing
Making process:Stamping, deep drawing,bending, punching, laser cutting,threading,
welding, tapping, riveting, grinding
5.air bag system
It is a safety device. When the door is down to hit something, it will up automatically.
Operation pressure:<3mbar
Battery:CR2032*2
Battery lifetime>1 year
Emission frequency: 315MHZ
Emission power:<10mW
Receiver power source:12V
6.duplex enhanced guide wheel bracket
Determining the right type of sectional door roller for your garage door tracks can be a little confusing, especially when you do not know what you need to look for in a garage door roller. To simplify things, there are two primary things you need to be aware of. First are the actual dimensions of the roller, and second is purpose that you will be using the door for. You can read below about measuring your roller and choosing the right quality of material for your door.
Other Door Accessories,Electronic Door Accessories,Automatic Door Accessories,High Speed Door Radar Detector Shenzhen Hongfa Automatic Door Co., Ltd. , https://www.hffreezerdoor.com
Huazhong University Printed Mesoscopic Perovskite Solar Cell Research Breakthrough