Stable organic photosensitive devices with exciton-blocking charge carrier filters utilizing high glass transition temperature materials

US10276817B2 · kind B2 · utility

Assignees

• University of Southern California · US
• THE REGENTS OF THE UNIVERSITY OF MICHIGAN · US

Inventors

• Stephen R. Forrest · Ann Arbor, US
• Quinn Burlingame · Ann Arbor, US
• Xin Xiao · Houston, US
• Kevin Bergemann · Ann Arbor, US
• Anurag Panda · Ann Arbor, US
• Jeramy D. Zimmerman · Golden, US
• Brian E. Lassiter · San Francisco, US
• Mark E. Thompson · Villa Park, US
• Andrew N. Bartynski · East Palo Alto, US
• Cong Trinh · Santa Clara, US

Key dates

• Filing date: Jul 20, 2015
• Grant date: Apr 30, 2019
• Expiry date: Jul 20, 2035

Classification

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

Abstract

Disclosed herein are stable organic photosensitive devices including at least one exciton-blocking charge carrier filter. The filters comprise a mixture of at least one wide energy gap material having a sufficiently high glass transition temperature, e.g., higher than the temperature or temperature range at which the device typically operates, higher than a highest operating temperature of the device, higher than a threshold temperature value, etc. and at least one electron or hole conducting material. As described herein, the novel filters simultaneously block excitons and conduct the desired charge carrier (electrons or holes).