聚(3-己烷基噻吩)及其共聚物/碳六十衍生物混摻材料應用於光電壓電池元件之特性研究

In this study, the application and characteristics of photovoltaic cell fabricated with poly(3-hexylthiophene (P3HT) and its copolymers blending with (6,6)-phenyl-C61-butyric acid methyl ester (PCBM) have been investigated. Studies on the enhancement for power conversion efficiency of photovoltaic cell for the influence of the annealing temperature, annealing time, and weight ratio of P3HT/PCBM have been carried out. To analysis the characteristics of the power conversion efficiency, studies on the energy band and the strength of absorption spectra have been investigated. The power conversion efficiency of the photovoltaic cell fabricatd with P3HT/PCBM (1:1) subjected to heat treatment at 150 ℃ for 15 or 20 min is about 0.42% ~ 0.46%, which are larger than that (0.08%) of the original device (without annealing). The characteristics of the photovoltaic cell fabricatd with P3HT/PCBM (1:0.8) subjected to heat treatment at 100, 150, 180, and 200 ℃ for 20 min have been invertigated. The short-circuit current density, open-circuit voltage, fill factor, and efficiency of device subjected to heat trement at 150 ℃ are 1.88 mA/cm2, 0.4 V, 0.46, and 0.86%, respectively. The short-circuit current density, open-circuit voltage, fill factor, and power conversion efficiency of the photovoltaic cell with P3HT/PCBM (of 3:1 weight ratio) subjected to heat treatment at 150 ℃ for 10 min are 4.3 mA/cm2, 0.35 ,and 1.12%, respectively. On the other hand, the short-circuit current density, open-circuit voltage, and power efficiency of the photovoltaic cell fabricated with copoly(3-hexylthiophene-co-3-dodecylthiophene (P3HTDDT), which is synthesized by our laboratory, blending with PCBM subjected to heat treatment at 150 ℃ for 15 min are 0.135 mA/cm2, 0.61 V, and 0.65%, respectively.