 This study proposes a novel method for producing perovskite nanostructures, which involves replacing octodecine with olelamine as a solvent. This allows for the production of pure perovskites with different PB slash BR ratios, leading to the formation of different nanostructures. By increasing the reaction temperature from 120 to 180 degrees Celsius, the products transition from lead-free CSBR nanocrystals to poor lead CS4 PBBR6 nanocrystals and finally to normal CSPBBR3 nanocubes and nanowires. These nanostructures have a peak emission wavelength of 521 nanometers, a FWHM of 19 nanometers, and a PLQI of 64.9 percent. Additionally, WLED devices were fabricated using these nanostructures, demonstrating high-intensity white light and high stability. This study provides a new approach for understanding the synthesis mechanisms of perovskite nanomaterials and their applications. This article was authored by Hua Jingli, Wang Weilu, Jailing Zhao, and others. We are article.tv, links in the description below.