Open AccessImportant role of surface plasmon coupling with the quantum wells in a surface plasmon enhanced color-converting structure of colloidal quantum dots on quantum wells
Author(s) -
Yao-Tseng Wang,
Ruei-Nan Wu,
Chia-Chun Ni,
Cai-Chen Lu,
Cheng-Jin Cai,
Wai Fong Tse,
WenChun Chang,
YaoHaur Kuo,
YeanWoei Kiang,
Chengxu Yang
Publication year - 2020
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.390478
Subject(s) - materials science , quantum well , photoluminescence , optoelectronics , surface plasmon , quantum dot , surface plasmon resonance , plasmon , quantum efficiency , light emitting diode , localized surface plasmon , wavelength , absorption (acoustics) , optics , nanoparticle , laser , physics , nanotechnology , composite material
To improve the color-conversion efficiency based on a quantum-well (QW) light-emitting diode (LED), a more energy-saving strategy is needed to increase the energy transfer efficiency from the electrical input power of the LED into the emission of over-coated color-converter, not just from LED emission into converted light. In this regard, the efficiency of energy transfer of any mechanism from LED QW into the color-converter is an important issue. By overlaying blue-emitting QW structures and GaN templates with both deposited metal nanoparticles (DMNPs) and color-converting quantum dot (QD) linked synthesized metal nanoparticles (SMNPs) of different localized surface plasmon (LSP) resonance wavelengths for producing multiple surface plasmon (SP) coupling mechanisms with the QW and QD, we study the enhancement variations of their internal quantum efficiencies and photoluminescence decay times. By comparing the QD emission efficiencies between the samples with and without QW, one can observe the advantageous effect of QW coupling with LSP resonances on QD emission efficiency. Also, with the LSP resonance wavelengths of both DMNPs and SMNPs close to the QW emission wavelength for producing strong SP coupling with the QW and hence QD absorption, a higher QD emission or color-conversion efficiency can be obtained.