Recently, the team of Liu Shengzhong, a researcher in the thin-film silicon solar cell research group of Dalian Institute of Chemical Physics, Chinese Academy of Sciences, cooperated with Shaanxi Normal University professor Tian Qingwen and Ph.D. Wang Kang to make new progress in the research of inorganic CsPbI3 solar cells, and developed a chair-like band structure Of inorganic solar cells.
Inorganic CsPbI3 material has application prospects in the field of solar cells due to its high thermal stability, chemical stability, and excellent photoelectric properties. However, the carrier recombination between the CsPbI3 film interface and the body will cause energy loss, which limits the improvement of the photovoltaic performance of this type of solar cell. At the same time, the sensitivity of CsPbI3 battery to water vapor is another technical bottleneck for the commercial application of this material.
In order to improve the photoelectric performance and environmental stability of the inorganic perovskite battery, the research team designed a CsPbI3 solar cell with a chair-type energy band structure, that is, a CsPbI3 quantum dot layer is prepared on the upper surface of the CsPbI3 absorption layer, and phenyltrimethyl is prepared on the lower surface. A thin layer of base ammonium bromide (PMABr). The CsPbI3 quantum dot layer can reduce the lattice mismatch with the CsPbI3 microcrystalline film, and act as a hole transport channel to promote the separation of electrons and holes. The gradient doping of organic cations and Br elements in PMABr is beneficial to the improvement of the stability of the CsPbI3 film. These two passivation materials not only increase the forbidden band width of the CsPbI3 film interface and suppress the recombination rate of electron and hole pairs, but also have a more matched energy level structure and band bending, which can promote the separation and separation of electron and hole pairs. Extract. Based on this strategy, the researchers increased the photoelectric conversion efficiency of the CsPbI3 perovskite cell to 17.12%, the open-circuit voltage was increased to 1.15V, and the open-voltage loss was reduced to 0.53eV, which is the higher photoelectric performance currently reported for the material. In addition, the environmental stability of the battery is also significantly improved.
Related research results are published on Cell Reports Physical Science. The research work is funded by the National Key Research and Development Program, the Central University Basic Research Fund, the National Natural Science Foundation of China, the 111 project, and the Changjiang Scholars Innovation Team.
Cool and Washable Cotton Mask, you can see many kinds of Masks in this catalog, it`s a fashion and soft Way in this summer to against cornavirus/covid-19, better than traditional KN95/Ffp2 Respirator. And customer can also use PM2.5 Carbon Activated Filter Pad to insert the Mask to make sure the High filtration Efficiency.
Cotton Mask
Cotton Mask,Cotton Face Mask,3 Ply Cotton Mask,Disposable Cotton Mask
CAREABLE BIOTECHNOLOGY CO,. LTD , https://www.careablemask.com