Room temperature green to red electroluminescence from (Al,Ga)As/GaP QDs and QWs

Christian Golz; Shabnam Dadgostar; W. Ted Masselink; Fariba Hatami

doi:10.1117/12.2213382

8 March 2016 Room temperature green to red electroluminescence from (Al,Ga)As/GaP QDs and QWs

Christian Golz, Shabnam Dadgostar, W. Ted Masselink, Fariba Hatami

Proceedings Volume 9768, Light-Emitting Diodes: Materials, Devices, and Applications for Solid State Lighting XX; 97681I (2016) https://doi.org/10.1117/12.2213382
Event: SPIE OPTO, 2016, San Francisco, California, United States

Abstract

We present the growth, fabrication, and characterization of light-emitting diodes based on (Al,Ga)As quantum wells and dots embedded in a p-n GaP structure. Samples were grown on Sulphur-doped GaP (001) substrate using gas-source molecular beam epitaxy. The structures include either GaAs quantum structures with nominal coverage between 1.2 and 3.6 monolayers or Al_0.3Ga_0.7As quantum wells. For structures with GaAs layer thicker than 1.5 monolayers the 3.6% lattice mismatch in the materials system results in formation of quantum dots via Stranski-Krastanow growth mode with areal density of about 8×10¹⁰ cm^-2. The atomic-force and transmission-electron microscopy show that with increasing coverage of GaAs from 1.8 to 3.6 monolayers the average lateral size and height of dots change in the range of 17-34 nm and 0.9–2 nm, respectively. The diode structures emit light from the red to the green spectral range up to room temperature. The GaAs/GaP QDs show electroluminescence between 1.8 eV and 2 eV, whereas the Al_0.3Ga_0.7As quantum wells emit light between 2 eV and 2.2 eV.

Citation Download Citation

Christian Golz, Shabnam Dadgostar, W. Ted Masselink, and Fariba Hatami "Room temperature green to red electroluminescence from (Al,Ga)As/GaP QDs and QWs", Proc. SPIE 9768, Light-Emitting Diodes: Materials, Devices, and Applications for Solid State Lighting XX, 97681I (8 March 2016); https://doi.org/10.1117/12.2213382

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available