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Performance improvement of solar cells using CuPc as a sensitizer
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In this work, a new type of /polymer solar cells was fabricated. The devicestructure was indium tin oxide titanium dioxide / copper phthalocyanine (CuPc)/poly(3-hexylthiophene) (P3HT)/Au. In this architecture, was designed to act as electron acceptor, and P3HT was electron donor. CuPc was used as a sensitizer to enhance photon absorption. The results show that by inserting CuPc between P3HT and layers, the light absorption,excitons separation, and photocurrent under illumination are dramatically improved. The device has a short current density of and power conversion efficiency of 0.28% without CuPc layer. However, and turn to be and 0.66%, respectively, with a thickness CuPc layer under air mass 1.5 global (AM1.5G) illumination with the intensity of . The performance improvement can be attributed to the higher carrier mobility and the stronger photon absorption using CuPc as a sensitizing layer.
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