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Sci Rep. 2016 Mar 14;6:23064. doi: 10.1038/srep23064.

Fabrication of a Functionally Graded Copper-Zinc Sulfide Phosphor.

Scientific reports

Jehong Park, Kwangwon Park, Jongsu Kim, Yongseok Jeong, Akira Kawasaki, Hansang Kwon

Affiliations

  1. Next-Generation Materials Co., Ltd. (NGM), Building-7, 365, Sinseon-ro, Busan 48547, Korea.
  2. Department of Display Engineering, Pukyong National University, Gaon-building, 905, Yongso-ro, Busan 48513, Korea.
  3. Department of Materials Processing Engineering, Tohoku University, Sendai 980-8579, Japan.
  4. Department of Materials System Engineering, Pukyong National University, Building-7, 365, Sinseon-ro, Busan 48547, Korea.

PMID: 26972313 PMCID: PMC4789794 DOI: 10.1038/srep23064

Abstract

Functionally graded materials (FGMs) are compositionally gradient materials. They can achieve the controlled distribution of the desired characteristics within the same bulk material. We describe a functionally graded (FG) metal-phosphor adapting the concept of the FGM; copper (Cu) is selected as a metal and Cu- and Cl-doped ZnS (ZnS:Cu,Cl) is selected as a phosphor and FG [Cu]-[ZnS:Cu,Cl] is fabricated by a very simple powder process. The FG [Cu]-[ZnS:Cu,Cl] reveals a dual-structured functional material composed of dense Cu and porous ZnS:Cu,Cl, which is completely combined through six graded mediating layers. The photoluminescence (PL) of FG [Cu]-[ZnS:Cu,Cl] is insensitive to temperature change. FG [Cu]-[ZnS:Cu,Cl] also exhibits diode characteristics and photo reactivity for 365 nm -UV light. Our FG metal-phosphor concept can pave the way to simplified manufacturing of low-cost and can be applied to various electronic devices.

References

  1. J Phys Condens Matter. 2010 Feb 10;22(5):055301 - PubMed
  2. Nature. 2002 Jun 20;417(6891):813-21 - PubMed
  3. J Mech Behav Biomed Mater. 2014 Feb;30:266-73 - PubMed
  4. Adv Mater. 2014 May 21;26(19):3088-93 - PubMed
  5. Adv Mater. 2012 May 2;24(17):2305-9 - PubMed

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