HJT Industry is the abbreviation for Heterojunction Technology, which refers to heterojunction cells.
The HJT industry deposits thin films of amorphous silicon on crystalline silicon. It combines the advantages of crystalline silicon cells and thin film cells. It has high conversion efficiency, low process temperature, high stability, low attenuation rate and double. It has advantages such as complete electricity generation and the technology is revolutionary. As one of the most popular next-generation photovoltaic technologies, HJT technology has many advantages that other technologies cannot match. It is considered the third generation solar cell technology after BSF and PERC technology.
The development of solar cells has entered the third generation. The first onegeneration is monocrystalline silicon solar cells, and the second generation is polycrystalline silicon, amorphous silicon and other solar cells. Dye-sensitized solar cells use low-cost nanoscale titanium dioxide and photosensitive dyes as the main raw materials to simulate nature. Plants use solar energy to perform photosynthesis and convert solar energy into electrical energy. Compared with traditional solar cells, its biggest advantage is that its production process is simple, does not require expensive equipment and high-clean factory facilities, and its production cost is only 1/ 10 to 1/5 that of silicon solar cells. The battery uses nano-titanium dioxide, N3 dye, electrolyte and other cheap, environmentally friendly and pollution-free materials. At the same time, it has relatively less stringent light requirements and can operate even in relatively dim light. I hope to adopt it!
| (12 points) (1) 3d 10 (2 points) (2) Br>As>Se (2 points) ( 3 )①SP 3 (2 points)
(4)①12 (2 points)②b |
| Analysis of the test questions: (1) The cuprous ion is obtained by losing an electron d 'a copper atom, so there are 28 electrons, so it's 3d 10; (2) Since the peripheral electronic arrangement of A S is 4S 2 4P 3, each orbital electron is in a half-filled state, and the energy is relatively low and relatively stable, it is more difficult to lose electrons. (3) ① According to the theory of mutual repulsion of valence shell electrons, [B(OH) 4 ] - the number of valence electrons in B is (3+4+1 )/2=4, so it should be SP 3 Hybridization; ② (4) ①In SiC, each SI is covalently bonded to the four surrounding atoms and its structure is the same as that of diamond. Looking at its structure diagram, we can see that it should be 12; ②b. Dry ice c. Ice is a molecular crystal, but there are hydrogen bonds in ice, so the melting point of the crystal, from small to large, is b<. c |