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US 7,675,057 B2Granted
Photoactive component with organic layers
AssigneeTechnische Universitaet Dresden
InventorsJens Drechsel, Martin Pfeiffer, Bert Maennig, Karl Leo
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AssigneeTechnische Universitaet Dresden
InventorsJens Drechsel, Martin Pfeiffer, Bert Maennig, Karl Leo
Estimating the term…
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.
Photoactive component with organic layers, comprising a solar cell having a series of organic thin layers and contact layers with a doped transport layer and a photoactive layer, which are arranged in a first pi, ni or pin diode structure comprising a first p, i or n layer each, wherein the transport layer exhibits a greater optical band gap than the photoactive layer and the structure is partially transparent in at least one part of the solar spectrum from 350 nm to 2000 nm.
Dependencies are inferred from the claim text.