TY - JOUR
T1 - Enhanced luminescence of quasi-double heterostructured violet light-emitting diodes based on n-Mg0.027Zn0.973O QD and p-Cu1-xZnxI thin films fabricated via simple thermal diffusion and iodination processes
AU - Baek, Sung Doo
AU - Myoung, Jae Min
N1 - Publisher Copyright:
© 2020 Elsevier B.V.
PY - 2021/6/1
Y1 - 2021/6/1
N2 - The advent of GaN and its alloys has revolutionized the field of lighting. However, owing to the associated high-cost materials and vacuum-based processes, alternatives to GaN are being researched. Among recently emerging light-emitting diode (LED) materials, γ-phase cuprous iodide (γ-CuI) exhibits remarkable potential because of its wide direct bandgap (2.95 eV) and high exciton binding energy (62 meV). In this study, we fabricated violet LEDs composed of n-Mg0.027Zn0.973O quantum dots and p-Cu1-xZnxI thin films. To enhance the device performance, a quasi-double heterostructure, which is a slightly modified double heterostructure, was designed. Simple thermal diffusion of Zn and Cu iodination processes were used to realize this structure, and the LED fabricated in this manner exhibited approximately 10-fold stronger luminescence than the LED with the pristine p-CuI thin film.
AB - The advent of GaN and its alloys has revolutionized the field of lighting. However, owing to the associated high-cost materials and vacuum-based processes, alternatives to GaN are being researched. Among recently emerging light-emitting diode (LED) materials, γ-phase cuprous iodide (γ-CuI) exhibits remarkable potential because of its wide direct bandgap (2.95 eV) and high exciton binding energy (62 meV). In this study, we fabricated violet LEDs composed of n-Mg0.027Zn0.973O quantum dots and p-Cu1-xZnxI thin films. To enhance the device performance, a quasi-double heterostructure, which is a slightly modified double heterostructure, was designed. Simple thermal diffusion of Zn and Cu iodination processes were used to realize this structure, and the LED fabricated in this manner exhibited approximately 10-fold stronger luminescence than the LED with the pristine p-CuI thin film.
KW - Iodination process
KW - Quasi-double heterostructure
KW - Thermal diffusion
KW - Violet light-emitting diode
KW - n-MgZnO quantum dot
KW - p-CuZnI thin film
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U2 - 10.1016/j.cej.2020.127401
DO - 10.1016/j.cej.2020.127401
M3 - Article
AN - SCOPUS:85094167736
SN - 1385-8947
VL - 413
JO - Chemical Engineering Journal
JF - Chemical Engineering Journal
M1 - 127401
ER -