Sol-Gel Processed p-Type CuO Phototransistor for a Near-Infrared Sensor

Sojeong Lee, Won Yong Lee, Bongho Jang, Taegyun Kim, Jin Hyuk Bae, Kyoungah Cho, Sangsig Kim, Jaewon Jang

Research output: Contribution to journalArticlepeer-review

43 Citations (Scopus)


Solution- p-type thin-film transistors, consisting of sol-gel-processed CuO films, were fabricated. The optoelectric properties of sol-gel-processed, CuO-based back gate thin-film transistors were investigated, and a detectivity of $1.38 × 10 11 (cm Hz 1/ W -1) was achieved. This detectivity for sol-gel-processed CuO thin-film transistors is higher than that of the previously reported layered two-dimensional material systems and comparable to that of devices based on a one-dimensional nanowire system. Our results indicate that the sol-gel-processed, CuO-based photodetector system is a promising candidate for applications, such as near-infrared imaging devices, sensors, solar cells, and p-type inks for future printed electronics.

Original languageEnglish
Article number8141870
Pages (from-to)47-50
Number of pages4
JournalIEEE Electron Device Letters
Issue number1
Publication statusPublished - 2018 Jan
Externally publishedYes

Bibliographical note

Funding Information:
Manuscript received November 11, 2017; accepted November 30, 2017. Date of publication December 4, 2017; date of current version December 27, 2017. This work was supported by the Basic Science Research Program through the National Research Foundation of Korea from the Ministry of Education under Grant NRF-2016R1D1A3B03930896. The review of this letter was arranged by Editor O. Manasreh. (Corresponding author: Jaewon Jang.) S. Lee, W.-Y. Lee, B. Jang, T. Kim, J.-H. Bae, and J. Jang are with the School of Electronics Engineering, Kyungpook National University, Daegu 41566, South Korea (e-mail :

Publisher Copyright:
© 2017 IEEE.


  • CuO
  • Sol-gel
  • photocurrent
  • thin film transistors

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering


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