Ternary Planar Heterojunction Organic Solar Cells Based on the Ternary Active Layers: α-6T/AlPcCl/C60

Ternary planar heterojunction organic solar cells (PHJ-OPVs) were fabricated using three small molecules, alpha-sexithiophene (α-6T), aluminum phthalocyanine chloride (AlPcCl) and fullerene (C60). These molecules can be easily sublimated under a vacuum; they have complementary optical absorption spectra their energy band structure alignment is favorable for electronic charge transfers. Moreover, α-6T AlPcCl almost the same HOMO, which desirable to avoid any decrease in open circuit voltage. The intercalated layer bridges levels of electron donor, α-6T, acceptor, C60, facilitates transport through cascade effect. carrier mobility measurements AlPcCl, space limited current method, demonstrated that it iss ambipolar. All these properties combine improve power conversion efficiency (PCE) PHJ-OPVs by moving from binary structures (α-6T/C60, α-6T/AlPcCl AlPcCl/C60) ternary ones (α-6T/AlPcCl/C60). We show, this study, both interfaces are efficient separation. After optimization different thickness, we show that, comparing optimum efficiencies PHJ-OPVs, realization based on active layers α-6T/AlPcCl/C60, following optimized allows us achieve PCE 4.33%.