Dr. Alex P. Stavrides Profile

Dr. Alex P. Stavrides

at FE ThinFilms LLC

SPIE Involvement:

Author

Publications (1)

This will count as one of your downloads.

You will have access to both the presentation and article (if available).

DOWNLOAD NOW

This content is available for download via your institution's subscription. To access this item, please sign in to your personal account.

Email or Username Forgot your username?

Password Forgot your password?

Show

Keep me signed in

No SPIE account? Create an account

Proceedings Article | 8 September 2006 Paper

Use of amorphous silicon tandem junction solar cells for hydrogen production in a photoelectrochemical cell

Alex Stavrides, Augusto Kunrath, Jian Hu, Richard Treglio, Ari Feldman, Bjorn Marsen, Brian Cole, Eric Miller, Arun Madan

Proceedings Volume 6340, 63400K (2006) https://doi.org/10.1117/12.678870

KEYWORDS: Amorphous silicon, Zinc oxide, Solar cells, Glasses, Solar energy, Hydrogen production, Photons, Hydrogen, Electrodes, Sputter deposition

Read Abstract +

We report the use of amorphous silicon (a-Si) tandem junctions as part of an integral "hybrid" photoelectrochemical (PEC) cell to produce hydrogen directly from water using sunlight. The device configuration consists of stainless steel (SS)/ni₂pni₁p/ZnO/WO₃. When the device is immersed in an electrolyte and illuminated, O₂ is evolved at the WO₃/electrolyte interface and H₂ is produced at the counter electrode. A voltage >1.23V is required to split water; typically 1.6-1.8V are needed, taking account of losses in a practical water-splitting system. We use a-Si tandem cells, deposited by plasma-enhanced chemical vapor deposition, to supply this voltage. Current matching in the two a-Si subcells is achieved by altering the thicknesses of the two layers (i₁ and i₂) while keeping their band gaps at ~1.75eV, which results in a device with an open circuit voltage >1.6V, short circuit current density (J_sc) >6mA/cm² (on SS substrates), and a fill factor >0.6. Deposition on a textured SnO₂ coated glass has resulted in J_sc >9mA/cm². Photoactive WO₃ films, deposited using the RF sputtering technique, have achieved photocurrents >3mA/cm² at 1.6V vs. saturated calomel electrode (SCE). The PEC device operates at the point at which the WO₃ photocurrent IV curve and the a-Si (filtered by WO₃) light IV curve cross, leading to operating currents of 2.5mA/cm² and solar-to-hydrogen (STH) conversion efficiency of >3%.

My Library

You currently do not have any folders to save your paper to! Create a new folder below.

Folder Name

Folder Description

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks. You are receiving this notice because your organization may not have SPIE eBooks access.*

*Shibboleth/Open Athens users─please sign in to access your institution's subscriptions.

To obtain this item, you may purchase the complete book in print or electronic format on SPIE.org.

ORGANIZATIONAL
Sign in with credentials provided by your organization.

Organizational Username

Organizational Password

Show/Hide Password

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

Members:

Non-members: ADD TO CART

Keywords/Phrases

Search In:

Publication Years