Structurally engineered colloidal quantum dot phosphor using TiO<sub>2</sub> photonic crystal backbone

Hansol Lee; Tae-Yun Lee; Yeonsang Park; Kyung-Sang Cho; Young-Geun Rho; Hyuck Choo; Heonsu Jeon

doi:10.1038/s41377-022-01020-2

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Structurally engineered colloidal quantum dot phosphor using TiO₂ photonic crystal backbone

Original Articles

- Structurally engineered colloidal quantum dot phosphor using TiO₂ photonic crystal backbone
- Light: Science & Applications Vol. 11, Issue 11, Pages: 2782-2789(2022)
- Affiliations：
  
  1.Department of Physics and Astronomy, Seoul National University, Seoul 08826, Republic of Korea
  2.Inter-university Semiconductor Research Center, Seoul National University, Seoul 08826, Republic of Korea
  3.Department of Physics, Chungnam National University, Daejeon 34134, Republic of Korea
  4.Institute of Quantum Systems, Chungnam National University, Daejeon 34134, Republic of Korea
  5.Samsung Advanced Institute of Technology, Suwon 16678, Republic of Korea
  6.Institute of Applied Physics, Seoul National University, Seoul 08826, Republic of Korea
- Author bio：
  
  Young-Geun Rho (yg000.roh@samsung.com)
  Hyuck Choo (hyuck.choo@samsung.com)
  Heonsu Jeon (hsjeon@snu.ac.kr)
- Funds：
- DOI：10.1038/s41377-022-01020-2
  CLC：
- Published：30 November 2022，
  
  Published Online：01 November 2022，
  
  Received：22 April 2022，
  
  Revised：12 October 2022，
  
  Accepted：13 October 2022
- Accepted：
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Lee, H. et al. Structurally engineered colloidal quantum dot phosphor using TiO₂ photonic crystal backbone. Light: Science & Applications, 11, 2782-2789 (2022).
DOI：

Lee, H. et al. Structurally engineered colloidal quantum dot phosphor using TiO₂ photonic crystal backbone. Light: Science & Applications, 11, 2782-2789 (2022). DOI： 10.1038/s41377-022-01020-2.

摘要

Abstract

Photonic crystal (PhC) phosphor

in which the phosphor material is periodically modulated for an enhancement in color-conversion efficiency via resonant absorption of excitation photons

is a paradigm-shifting structural phosphor platform. Two-dimensional (2D) square-lattice PhC phosphor is currently considered the most advanced platform because of not only its high efficiency

but also its immunity to excitation polarization. In the present study

two major modifications are made to further improve the performance of the 2D PhC phosphor: increasing the refractive index contrast and planarizing the surface. The index contrast is improved by replacing the PhC backbone material with TiO

whereas the surface planarization is achieved by removing excessive colloidal quantum dots from the surface. In comparison with the reference phosphor

the upgraded PhC phosphor exhibits ~59 times enhanced absorption (in simulations) and ~7 times enhanced emission (in experiments)

both of which are unprecedentedly high. Our results not only brighten the viability and applicability of the PhC phosphor but also spur the phosphor development through structural engineering of phosphor materials.

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Structurally engineered colloidal quantum dot phosphor using TiO2 photonic crystal backbone

DOI：10.1038/s41377-022-01020-2

摘要

Abstract

关键词

Keywords

references

Structurally engineered colloidal quantum dot phosphor using TiO₂ photonic crystal backbone