聚-3己烷塞吩/ 富勒烯(C61)衍生物之有機太陽能電池效率測試

Abstract

Abstract Research on polymer solar cell has been developed during the past 30 years. Recent efforts have been on developments of low cost materials and process, large scale production, and large coating area. Most researches focus on study hetero-junction solar cell by using poly (3-hexylthiophene-2,5-diyl) (P3HT) and 1-(3-methoxycarbonyl)-propyl-1-phenyl-(6,6)C61 (PCBM). This study prepares hetero-junction solar cell by using P3HT and PCBM, and determines the power conversion efficiencies of the solar cells. Four parts were discussed in the following. First is the analysis of active layer thickness. The single layer device and the blend layer device were made using P3HT and P3HT/PCBM for 15 mg/mL and 30mg/mL in chloroform The active layer thicknesses were controlled by using different rotation speeds in the range from 200 rpm 3500 rpm, respectively. The annealing temperature and time used was 130 oC and 1hr. The power conversion efficiency (η) of devices made were measured by using a solar simulator. The active layer thickness was measured by means of field emission - scanning electron microscope. Second part of this study is to study the effect of solvents. The blend layer device are prepared by using P3HT/PCBM (30 mg/mL) in chloroform, chlorobenzene and toluene as solvents.The spin coating speed was controlled in the range of 500 rpm to 3500 rpm to produce different active layer thicknesses. The annealing process used was 130 oC for 1 h. All the devices made were analyzed by using the solar simulator and UV-Vis spectrophotometers. Third, different annealing processes were studied to prepare different blend layer devices by using P3HT/PCBM (30 mg/mL) in a selected solvent, (chlorobenzene) annealing temperature (100 oC to 200 oC), and annealing time (5 to 90 min). All the devices made were analyzed by using the solar simulator and UV-Vis spectrophotometers. Finally, the effect of hardening temperature process were studied to prepare different blend layer devices by using P3HT/PCBM (30 mg/mL) in chlorobenzene, hardening temperature (170 oC to 250 oC), and cooling temperature (-5oC to 25oC). Today, the best result of the devices made in this study are: the power conversion efficiency is 0.5 %，open circle voltage is 0.5 V，short circle current is 4.0 mA/cm2. The best solvent is chlorobenzene.