Hybrid photovoltaic junctions: metal/molecular organic insulator/semiconductor MOIS solar cells

Rotem Har-Lavan; Izhar Ron; Florent Thieblemont; David Cahen

doi:10.1117/12.768652

5 May 2008 Hybrid photovoltaic junctions: metal/molecular organic insulator/semiconductor MOIS solar cells

Rotem Har-Lavan, Izhar Ron, Florent Thieblemont, David Cahen

Proceedings Volume 7002, Photonics for Solar Energy Systems II; 70020M (2008) https://doi.org/10.1117/12.768652
Event: SPIE Photonics Europe, 2008, Strasbourg, France

Abstract

Using a dense organic monolayer, self-assembled and directly bound to n-Si, as high quality insulator with a thickness that can be varied from 1.5-2.5 nm, we construct a Metal-Organic Insulator-Semiconductor (MOIS) structure, which, if fabricated with semi-transparent top electrode, performs as a hybrid organic-inorganic photovoltaic device. The feasibility of the concept and the electrical properties of the insulating layer were first shown with a Hg top electrode, allowing use of prior know-how from electron transport through molecular monolayers, but with photon collection only from around the electrode. We then used another bottom-up fabrication technique, in addition to molecular self-assembly, electro-less metal deposition, to implement an all-covalently bound solid state device. Electro-less Au deposition yields an electrically continuous, porous and semi-transparent top electrode, improving photon harvesting. Aside from being a nearly ideal insulator, the monolayer acts to passivate and protect the interfacial Si layer from defects and to decrease the surface state density. In addition the cell, like any MIS solar cell, benefits from that the light needs only to cross a few thin transparent layers (anti-reflective coating, organic insulator) to reach the photovoltaically active cell part. This helps to generate carriers close to the junction area, even by short wavelength photons, and, thus, to increase light collection, compared to p-n junction solar cells. Due to low temperature cell fabrication without high vacuum steps, the MOIS approach might be interesting for low cost solar cells.

Citation Download Citation

Rotem Har-Lavan, Izhar Ron, Florent Thieblemont, and David Cahen "Hybrid photovoltaic junctions: metal/molecular organic insulator/semiconductor MOIS solar cells", Proc. SPIE 7002, Photonics for Solar Energy Systems II, 70020M (5 May 2008); https://doi.org/10.1117/12.768652

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