Organic photosensitive cells having a reciprocal-carrier exciton blocking layer

US7230269B2 · kind B2 · utility

Assignees

• THE TRUSTEES OF PRINCETON UNIVERSITY · US
• University of Southern California · US

Inventors

• Barry Rand · Princeton, US
• Stephen R. Forrest · Ann Arbor, US
• Mark E. Thompson · Villa Park, US

Key dates

• Filing date: Jun 13, 2005
• Grant date: Jun 12, 2007
• Expiry date: Nov 2, 2025

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02E10/549
• WIPO field: Micro-structural and nano-technology
• WIPO sector: Chemistry

Abstract

A photosensitive cell includes an anode and a cathode; a donor-type organic material and an acceptor-type organic material forming a donor-acceptor junction connected between the anode and the cathode; and an exciton blocking layer connected between the acceptor-type organic material of the donor-acceptor junction and the cathode, the blocking layer consisting essentially of a material that has a hole mobility of at least 10−7 cm2/V-sec or higher, where a HOMO of the blocking layer is higher than or equal to a HOMO of the acceptor-type material.