Impact of exciton fine structure on the energy transfer in magicsized(CdSe)13 clusters

作     者：Jan Bieniek Woonhyuk Baek Severin Lorenz Franziska Muckel Rachel Fainblat Taeghwan Hyeon Gerd Bacher 

作者机构：Werkstoffe der Elektrotechnik and CENIDEUniversity of Duisburg-EssenBismarckstr.81Duisburg 47057Germany School of Chemical and Biological Engineering and Institute of Chemical ProcessesSeoul National UniversitySeoul 08826Republic of Korea Center for Nanoparticle ResearchInstitute for Basic Science(IBS)Seoul 151-742Republic of Korea Department of Semiconductor Science&TechnologyBaekje-daeroDeokjin-guJeonju-siJeonbuk State 54896Republic of Korea Electroenergetic Functional Materials(EEFM)&CENIDEUniversity Duisburg-EssenDuisburg 47057Germany 

出 版 物：《Nano Research》 (纳米研究（英文版）)

年 卷 期：2024年第17卷第12期

页      面：10669-10676页

核心收录：

学科分类：080903[工学-微电子学与固体电子学] 0809[工学-电子科学与技术（可授工学、理学学位）] 07[理学] 070205[理学-凝聚态物理] 08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：support from the Deutsche Forschungsgemeinschaft(DFG)under contract BA 1422/22-1 support of the Research Center Program of Institute for Basic Science(IBS-R006-D1)in Republic of Korea 

主　　题：magic-sized cluster Mn-doping excitonic fine structure surface defects energy transfer 

摘      要：Magic-sized(CdSe)13 clusters(MSCs)represent a material class at the boundary between molecules and quantum dots that exhibit a pronounced and well separated excitonic fine *** characteristic photoluminescence is composed of exciton bandgap emission and a spectrally broad mid-gap emission related to surface ***,we report on a thermally activated energy transfer from fine-structure split exciton states to surface states by using temperature dependent photoluminescence excitation *** demonstrate that the broad mid-gap emission can be suppressed by a targeted Mn-doping of the MSC leading to the characteristic orange luminescence of the^(4)T_(1)→^(6)A_(1)Mn^(2+)*** energy transfer to the Mn^(2+)states is found to be significantly different than the transfer to the surface defect states,as the activation of the dopant emission requires a spin-conserving charge carrier transfer that only dark excitons can provide.