Organic photovoltaic cells utilizing ultrathin sensitizing...

H - Electricity – 01 – L

Patent

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H01L 51/42 (2006.01)

Patent

CA 2627992

A photosensitive device includes a series of organic photoactive layers disposed between two electrodes. Each layer in the series is in direct contact with a next layer in the series. The series is arranged to form at least one donor-acceptor heterojunction, and includes a first organic photoactive layer comprising a first host material serving as a donor, a thin second organic photoactive layer comprising a second host material disposed between the first and a third organic photoactive layer, and the third organic photoactive layer comprising a third host material serving as an acceptor. The first, second, and third host materials are different. The thin second layer serves as an acceptor relative to the first layer or as a donor relative to the third layer.

La présente invention concerne un dispositif photosensible qui comprend une série de couches photoactives organiques disposées entre les électrodes. Chaque couche de la série est en contact direct avec une couche suivante dans la série. La série est agencée pour former au moins une hétéro-jonction donneur-accepteur et comprend une première couche photoactive organique comprenant un premier matériau hôte servant de donneur, une deuxième couche photoactive organique mince comprenant un deuxième matériau hôte disposé entre la première et une troisième couche photoactive organique. La troisième couche photoactive organique comprend un troisième matériau hôte servant d'accepteur. Le premier, le deuxième et le troisième matériau hôte sont différents. La deuxième couche mince sert d'accepteur par rapport à la première couche ou de donneur par rapport à la troisième couche.

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