Stacked organic photosensitive devices

Forrest, Stephen; Xue, Jiangeng; Uchida, Soichi; Rand, Barry P.

Title: Stacked organic photosensitive devices

Patent · Tue Mar 27 00:00:00 EDT 2007

OSTI ID:1176169

Forrest, Stephen; Xue, Jiangeng; Uchida, Soichi; Rand, Barry P.

A device is provided having a first electrode, a second electrode, a first photoactive region having a characteristic absorption wavelength .lamda..sub.1 and a second photoactive region having a characteristic absorption wavelength .lamda..sub.2. The photoactive regions are disposed between the first and second electrodes, and further positioned on the same side of a reflective layer, such that the first photoactive region is closer to the reflective layer than the second photoactive region. The materials comprising the photoactive regions may be selected such that .lamda..sub.1 is at least about 10% different from .lamda..sub.2. The device may further comprise an exciton blocking layer disposed adjacent to and in direct contact with the organic acceptor material of each photoactive region, wherein the LUMO of each exciton blocking layer other than that closest to the cathode is not more than about 0.3 eV greater than the LUMO of the acceptor material.

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Research Organization:: Princeton Univ., NJ (United States)

Sponsoring Organization:: USDOE

Assignee:: The Trustees of Princeton University (Princeton, NJ)

Patent Number(s):: 7,196,366

Application Number:: 10/911,559

OSTI ID:: 1176169

Country of Publication:: United States

Language:: English

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