Transcription of Perovskites: crystal structure, important compounds and ...
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Perovskites: crystal structure, important compounds and ...
Perovskites: crystal structure , important compounds and propertiesPeng GaoGMF Group Meeting12,04,2016 Solar energy resourceTerrestrial sun lightGlobal Power DemandPV instillationsTo start We have to solve the energy problem. Any technology that has good potential to cut carbon emissions by > 10 % needs to be explored aggressively. Researchers should not be deterred by the struggles some companies are having. Someone needs to invest in scaling up promising solar cell And Historyof perovskite compoundsPerovskite is calcium titanium oxide or calcium titanate, with the chemical formula CaTiO3. The mineral was discovered by Gustav Rose in 1839 and is named after Russian mineralogist Count Lev AlekseevichPerovski(1792 1856). Allmaterialswith thesamecrystalstructureasCaTiO3,namelyAB X3,are termedperovskites: Very stable structure , large number of compounds , variety of properties, many practical applications.
The Perovskite Bandgap can be tuned by Chemical Substitution The band gap can be tuned from 1.57 eV to 2.23 eV by substituting bromine for iodine in CH 3 NH 3 Pb(Br x I 1-x) 3 Noh et al., Nano Lett. 2013 For hybrid tandem with CIGS eV But the morphology is not stable!
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