"In this thesis uvcurable polymers (noa 61, 65, 71, 76 and 138 from norland optics), were used for encapsulating organic solar cells (opvs) to increase their lifetime and profitability. Opvs cells were encapsulated in either: a dry nitrogen glove box and under normal conditions (outside glove box). All devices were stored outside glove box with minimal lighting. Best results both outside and inside the glove box were reached with noa 65 and noa 71 resins through the gce method and applying directly on the cell, respectively. Based on the experimental results it was observed that the efficiency decrease less for opvs encapsulated inside glove box (and tested outside); the used adhesives could provide an acceptable barrier against degradation caused mainly by oxygen and moisture."