Organic photosensitive cells grown on rough electrode with nano-scale morphology control

US7955889B1 · kind B1 · utility

Assignee

• THE TRUSTEES OF PRINCETON UNIVERSITY · US

Inventors

• Fan Yang · Fujian, CN
• Stephen R. Forrest · Ann Arbor, US

Key dates

• Filing date: Jul 11, 2006
• Grant date: Jun 7, 2011
• Expiry date: Oct 9, 2029

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02E10/549

Abstract

An optoelectronic device and a method for fabricating the optoelectronic device includes a first electrode disposed on a substrate, an exposed surface of the first electrode having a root mean square roughness of at least 30 nm and a height variation of at least 200 nm, the first electrode being transparent. A conformal layer of a first organic semiconductor material is deposited onto the first electrode by organic vapor phase deposition, the first organic semiconductor material being a small molecule material. A layer of a second organic semiconductor material is deposited over the conformal layer. At least some of the layer of the second organic semiconductor material directly contacts the conformal layer. A second electrode is deposited over the layer of the second organic semiconductor material. The first organic semiconductor material is of a donor-type or an acceptor-type relative to the second organic semiconductor material, which is of the other material type.