Photoactive component with organic layers

US7675057B2 · kind B2 · utility

Assignee

• Technische Universitaet Dresden · DE

Inventors

• Jens Drechsel · Dresden, DE
• Martin Pfeiffer · Winnenden, DE
• Bert Maennig · Dresden, DE
• Karl Leo · Dresden, DE

Key dates

• Filing date: Mar 19, 2004
• Grant date: Mar 9, 2010
• Expiry date: Mar 17, 2026

Classification

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

Abstract

The invention relates to a photoactive component, especially a solar cell, comprising organic layers and formed by at least one stacked pi, ni, and/or pin diode. The diodes are characterized in that they comprise at least one p-doped or n-doped transport layer having a larger optical band gap than that of the photoactive layer. The individual diodes are characterized by a high internal quantum yield, but can be optically thin (peak absorption <80%). A high external quantum yield is obtained by either enlarging the optical path of the incident light in the diodes using light traps, or by stacking a plurality of the diodes. The transition between two diodes being facilitated by transition layers for the purposes of improved recombination and generation. Both forms of embodiment have a number of specific advantages using the doped transport layers with a large band gap.