Organic photovoltaic cells utilizing ultrathin sensitizing layer

US7910825B2 · kind B2 · utility

Assignee

• THE TRUSTEES OF PRINCETON UNIVERSITY · US

Inventors

• Barry Rand · Princeton, US
• Stephen R. Forrest · Ann Arbor, US

Key dates

• Filing date: Nov 2, 2005
• Grant date: Mar 22, 2011
• Expiry date: Aug 6, 2027

Classification

• Technology area (CPC —): General

Abstract

A photosensitive device includes a series of organic photoactive layers disposed between two electrodes. Each layer in the series is in direct contact with a next layer in the series. The series is arranged to form at least one donor-acceptor heterojunction, and includes a first organic photoactive layer comprising a first host material serving as a donor, a thin second organic photoactive layer comprising a second host material disposed between the first and a third organic photoactive layer, and the third organic photoactive layer comprising a third host material serving as an acceptor. The first, second, and third host materials are different. The thin second layer serves as an acceptor relative to the first layer or as a donor relative to the third layer.