Sandwiching electron blocking layer with p-AlInN layer to enhance hole injection in AlGaN-based deep ultraviolet light-emitting diodes

Tariq Jamil, Muhammad Usman*, Habibullah Jamal

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

This work reports the enhanced optoelectronic performance of AlGaN-based deep ultraviolet light-emitting diodes (DUV LEDs) by sandwiching p-EBL with thin p-AlInN layers. The simulated results show that the internal quantum efficiency (IQE) and radiative recombination rate are remarkably improved as compared to conventional AlGaN-based p-EBL. The primary cause of this enhancement is the reduction of lattice mismatch between the electron blocking layer (EBL) and p-AlGaN due to the insertion of thin p-AlInN layers, which ultimately decreases the polarization effect. Moreover, p-AlInN layers also improved the hole injection efficiency via intra-band tunneling while hindered the electron leakage to the p-type layer. Interestingly, the proposed structure not only increased the IQE but also suppressed the efficiency droop dramatically.

Original languageEnglish
Article number111389
JournalMaterials Research Bulletin
Volume142
DOIs
Publication statusPublished - Oct 2021
Externally publishedYes

Keywords

  • AlInN
  • DUV LEDs
  • Efficiency
  • Polarization

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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