Novel P-type wide bandgap manganese oxide quantum dots for self-powered solar-blind deep UV devices

Iman S. Roqan*, Somak Mitra, Norah Alwadai, Hadeel Alamoudi, Zohoor Alharbi, Fatimah Alreshidi, Bin Xin, Yusin Pak

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


Obtaining p-type wide bandgap semiconductors operating in the deep UV (DUV) range (λ < 300 nm) is still challenging. However, as a part of this work, we developed novel p-type solution-processed wide bandgap semiconductors based on solution-processed manganese oxide quantum dots (MnO-QDs) with the gap energy exceeding 4 eV synthesized by ultrafast laser ablation, which can be adopted for flexible and solar-blind DUV optoelectronics. We conducted advanced optical, structural, and electrical characterizations, revealing unique properties of this material. Our findings show excellent band alignment between these QDs and other wide bandgap semiconductors, such as GaN and Ga2O3. The high performance of a solar-blind self-powered DUV photodetector based on p-n junction that comprises n-type wide bandgap semiconductors and p-type MnO-QDs is demonstrated.

Original languageEnglish (US)
Title of host publicationOxide-based Materials and Devices XIV
EditorsDavid J. Rogers, Ferechteh H. Teherani
ISBN (Electronic)9781510659490
StatePublished - 2023
EventOxide-based Materials and Devices XIV 2023 - San Francisco, United States
Duration: Jan 30 2023Feb 2 2023

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X


ConferenceOxide-based Materials and Devices XIV 2023
Country/TerritoryUnited States
CitySan Francisco


  • metal-oxides
  • p-n junction
  • p-type semiconductor
  • photodiode
  • spin-optoelectronics
  • spin-photodetector
  • spin-solar cell

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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