Influence of Photon Pump Fluence on Charge Carriers in FAPbI3 and Manganite Perovskites  

作　　者：Nam Joong Jeon Jangwon Seo Sanghee Nah Jung-Keun Lee Nam Joong Jeon;Jangwon Seo;Sanghee Nah;Jung-Keun Lee(Division of Advanced Materials, Korea Research Institute of Chemical Technology, Daejeon, Korea;Seoul Center, Korea Basic Science Institute, Seoul, Korea;Physics Department, Division of Liberal Arts and Sciences, Hanil University & PTS, Wanju, Korea)

机构地区：[1]Division of Advanced Materials, Korea Research Institute of Chemical Technology, Daejeon, Korea [2]Seoul Center, Korea Basic Science Institute, Seoul, Korea [3]Physics Department, Division of Liberal Arts and Sciences, Hanil University & PTS, Wanju, Korea

出　　处：《Advances in Chemical Engineering and Science》2022年第1期54-64,共11页化学工程与科学期刊（英文）

摘　　要：FAPbI</span>_{<span style="font-family:Verdana;">3</span>}<span style="font-family:Verdana;"> and FA(Mn:Pb)I</span>_{<span style="font-family:Verdana;">3</span>}<span style="font-family:Verdana;"> perovskite films were prepared and evaluated</span></span><span style="font-family:""><span style="font-family:Verdana;"> through steady and transient absorption spectroscopy. According to the analysis using Elliot’s model, there were no considerable differences except for the absorption intensity between FAPbI</span>_{<span style="font-family:Verdana;">3</span>}<span style="font-family:Verdana;"> and FA(Mn:Pb)I</span>_{<span style="font-family:Verdana;">3</span>}<span style="font-family:Verdana;"> perovskite films: the value of the optical gap (</span><i><span style="font-family:Verdana;">E</span>_{<span style="font-family:Verdana;">g</span>}</i><span style="font-family:Verdana;">) and the position of exciton resonance (</span><i><span style="font-family:Verdana;">E</span>_{<span style="font-family:Verdana;">0</span>}</i><span style="font-family:Verdana;">) were the same. </span><span style="font-family:Verdana;">The femtosecond transient absorption showed biexponential relaxation</span><span style="font-family:Verdana;"> properties of the charge carriers, suggesting that biexcitons are more easily generated in FA(Mn:Pb)I</span>_{<span style="font-family:Verdana;">3</span>}<span style="font-family:Verdana;"> than FAPbI</span>_{<span style="font-family:Verdana;">3</span>}<span style="font-family:Verdana;"> perovskite. The generation of biexcitons in FA(Mn:Pb)I</span>_{<span style="font-family:Verdana;">3</span>}<span style="font-family:Verdana;"> was also confirmed by the photon pump fluence dependence. Moreover, we were able to estimate the average number of absorbed photons </span><i><span style="font-family:Verdana;"><N></span></i><span style="font-family:Verdana;"> directly from the photon pump power dependence without needing any further expeFAPbI</span>_{<span style="font-family:Verdana;">3</span>}<span style="font-family:Verdana;"> and FA(Mn:Pb)I</span>_{<span style="font-family:Verdana;">3</span>}<span style="font-family:Verdana;"> perovskite films were prepared and evaluated</span></span><span style="font-family:""><span style="font-family:Verdana;"> through steady and transient absorption spectroscopy. According to the analysis using Elliot’s model, there were no considerable differences except for the absorption intensity between FAPbI</span>_{<span style="font-family:Verdana;">3</span>}<span style="font-family:Verdana;"> and FA(Mn:Pb)I</span>_{<span style="font-family:Verdana;">3</span>}<span style="font-family:Verdana;"> perovskite films: the value of the optical gap (</span><i><span style="font-family:Verdana;">E</span>_{<span style="font-family:Verdana;">g</span>}</i><span style="font-family:Verdana;">) and the position of exciton resonance (</span><i><span style="font-family:Verdana;">E</span>_{<span style="font-family:Verdana;">0</span>}</i><span style="font-family:Verdana;">) were the same. </span><span style="font-family:Verdana;">The femtosecond transient absorption showed biexponential relaxation</span><span style="font-family:Verdana;"> properties of the charge carriers, suggesting that biexcitons are more easily generated in FA(Mn:Pb)I</span>_{<span style="font-family:Verdana;">3</span>}<span style="font-family:Verdana;"> than FAPbI</span>_{<span style="font-family:Verdana;">3</span>}<span style="font-family:Verdana;"> perovskite. The generation of biexcitons in FA(Mn:Pb)I</span>_{<span style="font-family:Verdana;">3</span>}<span style="font-family:Verdana;"> was also confirmed by the photon pump fluence dependence. Moreover, we were able to estimate the average number of absorbed photons </span><i><span style="font-family:Verdana;"><N></span></i><span style="font-family:Verdana;"> directly from the photon pump power dependence without needing any further expe

关 键 词：FAPbI3 Perovskite Manganites Transient Absorption 

分 类 号：O17[理学—数学]