AlxGa1-xN p-i-n photodiodes on sapphire substrates

Danielle Walker; Patrick Kung; Peter M. Sandvik; Jia-Jiun Wu; Melissa Hamilton; Il Hwan Lee; Jacqueline E. Diaz; Manijeh Razeghi

doi:10.1117/12.344556

7 April 1999 AlxGa_1-xN p-i-n photodiodes on sapphire substrates

Danielle Walker, Patrick Kung, Peter M. Sandvik, Jia-Jiun Wu, Melissa Hamilton, Il Hwan Lee, Jacqueline E. Diaz, Manijeh Razeghi

Author Affiliations +

Proceedings Volume 3629, Photodetectors: Materials and Devices IV; (1999) https://doi.org/10.1117/12.344556
Event: Optoelectronics '99 - Integrated Optoelectronic Devices, 1999, San Jose, CA, United States

Abstract

We report the fabrication and characterization of Al_xGa_1-xN p-i-n photodiodes (0.05 less than or equal to X less than or equal to 0.30) grown on sapphire by low-pressure metalorganic chemical vapor deposition. The devices present a visible-rejection of about four orders of magnitude with a cutoff wavelength that shifts from 350 nm to 291 nm. They also exhibit a constant responsivity for five decades (30 mW/m² to 1 kW/m²) of optical power density. Using capacitance measurements, the values for the acceptor concentration in the p-Al_xGa_1-xN region and the unintentional donor concentration in the intrinsic region are found. Photocurrent decays are exponential for high load resistances, with a time constant that corresponds to the RC product of the system. For low load resistances the transient response becomes non- exponential, with a decay time longer than the RC constant.

Citation Download Citation

Danielle Walker, Patrick Kung, Peter M. Sandvik, Jia-Jiun Wu, Melissa Hamilton, Il Hwan Lee, Jacqueline E. Diaz, and Manijeh Razeghi "AlxGa_1-xN p-i-n photodiodes on sapphire substrates", Proc. SPIE 3629, Photodetectors: Materials and Devices IV, (7 April 1999); https://doi.org/10.1117/12.344556

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