Highly luminescent (Zn,Cd)Te/CdSe colloidal heteronanowires with tunable electron-hole overlap.
We report the synthesis of ultranarrow (Zn,Cd)Te/CdSe colloidal heteronanowires, using ZnTe magic size clusters as seeds. The wire formation starts with a partial Zn for Cd cation exchange, followed by self-organization into segmented heteronanowires. Further growth occurs by inclusion of CdSe. The heteronanowires emit in the 530 to 760 nm range with high quantum yields. The electron-hole overlap decreases with increasing CdSe volume fraction, allowing the optical properties to be controlled by adjusting the heteronanowire composition.
Condensed Matter and Interfaces, Debye Institute, Utrecht University, 3508 TA Utrecht, The Netherlands. e.groeneveld@uu.nl
Esther
E
Groeneveld
Susanne
S
van Berkum
Matti M
MM
van Schooneveld
Alexandre
A
Gloter
Johannes D
JD
Meeldijk
Dave J
DJ
van den Heuvel
Hans C
HC
Gerritsen
Celso
C
de Mello Donega
D019187:Cadmium Compounds / Q000138:chemical synthesis / Q000737:chemistry*; D002857:Chromium / Q000737:chemistry*; D003102:Colloids / Q000737:chemistry; D004583:Electrons; D049449:Luminescence; D053770:Nanowires / Q000737:chemistry*; D010316:Particle Size; D018036:Selenium Compounds / Q000138:chemical synthesis / Q000737:chemistry*; D013499:Surface Properties; D013691:Tellurium / Q000737:chemistry*; D015032:Zinc / Q000737:chemistry*
D019187:Cadmium Compounds; D003102:Colloids; D018036:Selenium Compounds; D002857:Chromium; C058667:cadmium selenide; D015032:Zinc; D013691:Tellurium