Improved optical transparency of cuo films prepared by using quantum-dot ink on glass substrates

Rizwan Khan, Jin Hyeon Yun, In Hwan Lee, Mohammad Vaseem, Yoon Bong Hahn

Research output: Contribution to journalArticlepeer-review


The present investigation reports a simple solution process for synthesizing CuO quantum dots at low temperature without using surfactants or templates. Detailed structural characterizations revealed that the as-prepared CuO quantum dots were uniform and dense with high crystallinity. As-prepared CuO quantum dots were used as an ink to prepare CuO films on glass substrates via a spin-coating method. The effects of annealing temperature on the optical properties of CuO films were investigated. The optical transparency of the CuO films showed an improved transmittance of > 80% at a wave length of 800 nm after annealing at 300 °C. In addition, the band-gap energy was observed to decrease from 1.70 to 1.28 eV with increasing annealing temperature from 300 to 500 °C due to the improvement in the crystallinity with grain growth in the films.

Original languageEnglish
Pages (from-to)68-72
Number of pages5
JournalJournal of the Korean Physical Society
Issue number1
Publication statusPublished - 2016 Jan 1
Externally publishedYes

Bibliographical note

Funding Information:
This research was supported by the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT & Future Planning (2013R1A2A2A07067688).

Publisher Copyright:
© 2016, The Korean Physical Society.

Copyright 2016 Elsevier B.V., All rights reserved.


  • CuO
  • Ink solution
  • Optical properties
  • Quantum dots
  • Thin films

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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