Numerical investigation on the device performance of electron blocking layer free alinn nanowire deep ultraviolet light-emitting diodes

Ravi Teja Velpula, Barsha Jain, Ha Quoc Thang Bui, Tan Thi Pham, Van Thang Le, Hoang Duy Nguyen, Trupti Ranjan Lenka, Hieu Pham Trung Nguyen

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

We report on the illustration of the first electron blocking layer (EBL) free AlInN nanowire light-emitting diodes (LEDs) operating in the deep ultraviolet (DUV) wavelength region (sub-250 nm). We have systematically analyzed the results using APSYS software and compared with simulated AlGaN nanowire DUV LEDs. From the simulation results, significant efficiency droop was observed in AlGaN based devices, attributed to the significant electron leakage. However, compared to AlGaN nanowire DUV LEDs at similar emission wavelength, the proposed single quantum well (SQW) AlInN based light-emitters offer higher internal quantum efficiency without droop up to current density of 1500 A/cm2 and high output optical power. Moreover, we find that transverse magnetic polarized emission is 5 orders stronger than transverse electric polarized emission at 238 nm wavelength. Further research shows that the performance of the AlInN DUV nanowire LEDs decreases with multiple QWs in the active region due to the presence of the non-uniform carrier distribution in the active region. This study provides important insights on the design of new type of high performance AlInN nanowire DUV LEDs, by replacing currently used AlGaN semiconductors.

Original languageEnglish (US)
Pages (from-to)472-483
Number of pages12
JournalOptical Materials Express
Volume10
Issue number2
DOIs
StatePublished - Feb 1 2020

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials

Fingerprint Dive into the research topics of 'Numerical investigation on the device performance of electron blocking layer free alinn nanowire deep ultraviolet light-emitting diodes'. Together they form a unique fingerprint.

Cite this