Fabrication of nanostructured heterojunction LEDs using self-forming moth eye type arrays of n-ZnO nanocones grown on p-si (111) substrates by pulsed laser deposition

David J. Rogers; V. E. Sandana; F. Hosseini Teherani; M. Razeghi; H.-J. Drouhin

doi:10.1117/12.817030

28 February 2009 Fabrication of nanostructured heterojunction LEDs using self-forming moth eye type arrays of n-ZnO nanocones grown on p-si (111)substrates by pulsed laser deposition

David J. Rogers, V. E. Sandana, F. Hosseini Teherani, M. Razeghi, H.-J. Drouhin

Author Affiliations +

Proceedings Volume 7217, Zinc Oxide Materials and Devices IV; 721708 (2009) https://doi.org/10.1117/12.817030
Event: SPIE OPTO: Integrated Optoelectronic Devices, 2009, San Jose, California, United States

Abstract

ZnO nanostructures were grown on Si (111) substrates using: Pulsed Laser Deposition. The impact of growth temperature (Ts) and Ar pressure (PAr) on the morphology, crystal structure and photoluminescence was investigated. Various types of ZnO nanostructures were obtained. Self-forming arrays of vertically-aligned nanorods and nanocones with strong c-axis crystallographic orientation and good optical response were obtained at higher Ts. The nanocone, or "moth-eye", type structures were selected for LED development because of their graded effective refractive index, which could facilitate improved light extraction at the LED/air interface. Such moth-eye arrays were grown on p-type Si (111) substrates to form heterojunction LEDs with the n-type ZnO nanocones acting as an active component of the device. These nanostructured LEDs gave rectifying I/V characteristics with a threshold voltage of about 6V and a blueish-white electroluminescence, which was clearly visible to the naked eye.

Citation Download Citation

David J. Rogers, V. E. Sandana, F. Hosseini Teherani, M. Razeghi, and H.-J. Drouhin "Fabrication of nanostructured heterojunction LEDs using self-forming moth eye type arrays of n-ZnO nanocones grown on p-si (111)substrates by pulsed laser deposition", Proc. SPIE 7217, Zinc Oxide Materials and Devices IV, 721708 (28 February 2009); https://doi.org/10.1117/12.817030

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