High efficiency organic photovoltaic cells employing hybridized mixed-planar heterojunctions

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

Title: High efficiency organic photovoltaic cells employing hybridized mixed-planar heterojunctions

Patent · Tue Nov 19 00:00:00 EST 2013

OSTI ID:1108716

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

A device is provided, having a first electrode, a second electrode, and a photoactive region disposed between the first electrode and the second electrode. The photoactive region includes a first organic layer comprising a mixture of an organic acceptor material and an organic donor material, wherein the first organic layer has a thickness not greater than 0.8 characteristic charge transport lengths, and a second organic layer in direct contact with the first organic layer, wherein: the second organic layer comprises an unmixed layer of the organic acceptor material or the organic donor material of the first organic layer, and the second organic layer has a thickness not less than about 0.1 optical absorption lengths. Preferably, the first organic layer has a thickness not greater than 0.3 characteristic charge transport lengths. Preferably, the second organic layer has a thickness of not less than about 0.2 optical absorption lengths. Embodiments of the invention can be capable of power efficiencies of 2% or greater, and preferably 5% or greater.

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Research Organization:: National Renewable Energy Laboratory (NREL), Golden, CO (United States)

Sponsoring Organization:: USDOE

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

Patent Number(s):: 8,586,967

Application Number:: 10/910,371

OSTI ID:: 1108716

Country of Publication:: United States

Language:: English

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