TY - JOUR
T1 - Synthesis and Assembly of Core–Shell Nanorods with High Quantum Yield and Linear Polarization
AU - Zeng, Yicheng
AU - Su, Huixue
AU - Liu, Yuan
AU - Chen, Weiwei
AU - Liu, Fangze
AU - Gao, Hanfei
AU - Wu, Yuchen
AU - Manna, Liberato
AU - Li, Hongbo
N1 - Publisher Copyright:
© 2023 Wiley-VCH GmbH.
PY - 2023/12/1
Y1 - 2023/12/1
N2 - The seeded growth method offers an efficient way to design core–shell semiconductor nanocrystals in the liquid phase. The combination of seed and shell materials offers wide tunability of morphologies and photophysical properties. Also, semiconductor nanorods (NRs) exhibit unique polarized luminescence which can potentially break the theoretical limit of external quantum efficiency in light emitting diodes based on spherical quantum dots. Although rod-in-rod core–shell NRs present higher degree of polarization, most studies have focused on dot-in-rod core–shell NRs due to the difficulties in achieving uniform NR seeds. Here, this study prepares high-quality uniform CdSe NRs by improving the reactivity of the Se source, using a secondary phosphine, namely diphenylphosphine, to dissolve the Se power, along with the conventional tertiary phosphine, namely trioctylphosphine. Starting from these high-quality NR seeds, this study synthesizes CdSe/CdxZn1−xS/ZnS core–shell NRs with narrow emission bandwidth (29 nm at 620 nm), high PLQY (89%) and high linear polarization (p = 0.90). This study then assembles these core–shell NRs using the confined assembly method and fabricates long-range-ordered microarrays with programmable patterns and displaying highly polarized emission (p = 0.80). This study highlights the great potential of NRs for application in liquid crystal displays and full-color light emitting diodes displays.
AB - The seeded growth method offers an efficient way to design core–shell semiconductor nanocrystals in the liquid phase. The combination of seed and shell materials offers wide tunability of morphologies and photophysical properties. Also, semiconductor nanorods (NRs) exhibit unique polarized luminescence which can potentially break the theoretical limit of external quantum efficiency in light emitting diodes based on spherical quantum dots. Although rod-in-rod core–shell NRs present higher degree of polarization, most studies have focused on dot-in-rod core–shell NRs due to the difficulties in achieving uniform NR seeds. Here, this study prepares high-quality uniform CdSe NRs by improving the reactivity of the Se source, using a secondary phosphine, namely diphenylphosphine, to dissolve the Se power, along with the conventional tertiary phosphine, namely trioctylphosphine. Starting from these high-quality NR seeds, this study synthesizes CdSe/CdxZn1−xS/ZnS core–shell NRs with narrow emission bandwidth (29 nm at 620 nm), high PLQY (89%) and high linear polarization (p = 0.90). This study then assembles these core–shell NRs using the confined assembly method and fabricates long-range-ordered microarrays with programmable patterns and displaying highly polarized emission (p = 0.80). This study highlights the great potential of NRs for application in liquid crystal displays and full-color light emitting diodes displays.
KW - confined assemblies
KW - core–shells
KW - nanorod superstructures
KW - nanorods
KW - polarized emission
UR - http://www.scopus.com/inward/record.url?scp=85166589473&partnerID=8YFLogxK
U2 - 10.1002/adfm.202306091
DO - 10.1002/adfm.202306091
M3 - Article
AN - SCOPUS:85166589473
SN - 1616-301X
VL - 33
JO - Advanced Functional Materials
JF - Advanced Functional Materials
IS - 49
M1 - 2306091
ER -