Fully Transparent GaN Homojunction Tunnel Junction-Enabled Cascaded Blue LEDs.

Jamal-Eddine, Zane; Hasan, Syed M. N.; Gunning, Brendan Patrick; Chandrasekar, Hareesh; Crawford, Mary H.; Armstrong, Andrew; Arafin, Shamsul; Rajan, Siddharth

doi:10.1063/5.0015403

Fully Transparent GaN Homojunction Tunnel Junction-Enabled Cascaded Blue LEDs.

Journal Article · Tue Aug 04 00:00:00 EDT 2020 · Applied Physics Letters

DOI:https://doi.org/10.1063/5.0015403· OSTI ID:1650177

^[1]; Hasan, Syed M. N. ^[1]; ^[2]; ^[1]; Crawford, Mary H. ^[2]; ^[2]; ^[1]; Rajan, Siddharth ^[3]

The Ohio State Univ., Columbus, OH (United States). Dept. of Electrical and Computer Engineering
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
The Ohio State Univ., Columbus, OH (United States). Dept. of Electrical and Computer Engineering and Dept. of Materials Science and Engineering

A sidewall activation process was optimized for buried magnesium-doped p-GaN layers yielding a significant reduction in tunnel junction-enabled light emitting diode (LED) forward voltage. This buried activation enabled the realization of cascaded blue LEDs with fully transparent GaN homojunction tunnel junctions. The initial optimization of buried p-GaN activation was performed on PN junctions grown by metal organic chemical vapor deposition (MOCVD) buried under hybrid tunnel junctions grown by MOCVD and molecular beam epitaxy. Next the activation process was implemented in cascaded blue LEDs emitting at 450 nm, which were enabled by fully transparent GaN homojunction tunnel junctions. The tunnel junction-enabled multi-active region blue LEDs were grown monolithically by MOCVD. This work demonstrates a state-of-the-art tunnel junction-enabled cascaded LED utilizing homojunction tunnel junctions which do not contain any heterojunction interface.

View Accepted Manuscript (DOE)

Research Organization:: Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Building Technologies Program; USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: AC04-94AL85000; NA0003525

OSTI ID:: 1650177

Alternate ID(s):: OSTI ID: 1644725

Report Number(s):: SAND--2020-8445J; 689950

Journal Information:: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 5 Vol. 117; ISSN 0003-6951

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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Fully Transparent GaN Homojunction Tunnel Junction-Enabled Cascaded Blue LEDs.

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