Investigation of Temperature-Dependent Electrical Properties of Tc-CuPc: PCBM Bulk Heterojunction (BHJ) under Dark Conditions
نویسنده
چکیده
An organic bulk heterojunction (BHJ) was fabricated using a blended film containing Copper (II) tetrakis(4cumylphenoxy)phthalocyanine (Tc-CuPc) along with [6,6]-Phenyl C61 butyric acid methyl ester (PCBM). Weight ratio between TcCuPc and PCBM was 1:1. The electrical properties of TcCuPc:PCBM BHJ were examined. Rectifying nature of the BHJ was displayed by current-voltage (I-V) curves, recorded in dark and at various temperatures. At low voltages, conduction was ohmic succeeded by space-charge limiting current (SCLC) conduction at higher voltages in which exponential trap distribution was dominant. Series resistance, shunt resistance, ideality factor, effective barrier height and mobility at room temperature were found to be 526 Ω, 482 kΩ, 3.7, 0.17 eV and 2×10 cmVs respectively. Temperature effect towards different BHJ parameters was observed under dark condition. Keywords—bulk heterojunction, PCBM, phthalocyanine, spin coating.
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