Pushing the Band Gap Envelope of Quasi-Type II Heterostructured Nanocrystals to Blue:ZnSe/ZnSe_(1-X)Te_(X)/ZnSe Spherical Quantum Wells

作     者：Jun Hyuk Chang Hak June Lee Seunghyun Rhee Donghyo Hahm Byeong Guk Jeong Gabriel Nagamine Lazaro APadilha Kookheon Char Euyheon Hwang Wan Ki Bae 

作者机构：SKKU Advanced Institute of Nano TechnologySungkyunkwan UniversitySuwon 16419Republic of Korea School of Chemical and Biological EngineeringSeoul National UniversitySeoul 08826Republic of Korea Instituto de Fisica“Gleb Wataghin”Universidade Estadual de CampinasUNICAMPP.O.Box 616513083-859 CampinasSão PauloBrazil 

出 版 物：《Energy Material Advances》 (能源材料前沿（英文）)

年 卷 期：2021年第2021卷第1期

页      面：285-294页

核心收录：

学科分类：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：the National Research Foundation of Korea(NRF)grant funded by the Ministry of Science,ICT and Future Planning(No.2020M3H4A1A01086888,No.2020M3D1A2101319,No.2020R1A2C2011478,and No.2019M3D1A1078299) the Ministry of Trade,Industry&Energy(MOTIE,Korea)(No.20010737) the Electronics and Telecommunications Research Institute(ETRI)grant funded by the Korean Government(No.20ZB1200,Development of ICT Materials,Components and Equipment Technologies).G.N.and L.A.P.are thankful for the financial support from the Sao Paulo Research Foundation(FAPESP)under the grant No.2018/15574-6 

主　　题：ZnSe/ZnS quantum Push 

摘      要：Quasi-type II heterostructured nanocrystals(NCs)have been of particular interest due to their great potential for controlling the interplay of charge ***,the lack of material choices for quasi-type II NCs restricts the accessible emission wavelength from red to near-infrared(NIR),which hinders their use in light-emitting applications that demand a wide range of visible ***,we demonstrate a new class of quasi-type II nanoemitters formulated in ZnSe/ZnSe_(1-X)Te_(X)/ZnSe seed/spherical quantum well/shell heterostructures(SQWs)whose emission wavelength ranges from blue to *** a given geometry,ZnSe_(1-X)Te_(X) emissive layers grown between the ZnSe seed and the shell layer are strained to fit into the surrounding media,and thus,the lattice mismatch between ZnSe_(1-X)Te_(X) and ZnSe is effectively *** addition,composition of the ZnSe_(1-X)Te_(X) emissive layer and the dimension of the ZnSe shell layer are engineered to tailor the distribution and energy of electron and hole wave *** from the capabilities to tune the charge carriers on demand and to form defectfree heterojunctions,ZnSe/ZnSe_(1-X)Te_(X)/ZnSe/ZnS NCs show near-unity photoluminescence quantum yield(PLQY90%)in a broad range of emission wavelengths(peak PL from 450nm to 600 nm).Finally,we exemplify dichromatic white NC-based light-emitting diodes(NC-LEDs)employing the mixed layer of blue-and yellow-emitting ZnSe/ZnSe_(1-X)TeX/ZnSe/ZnS SQW NCs.