| Increasing crisis in energy and environmental pollution has becoming growing problem today. Different forms of renewable and clean energies have been attracted more and more attention around the world. Solar energy is one of the most ideal of renewable energy. Solar cells convert solar energy into electricity directly, which becomes a major research project of renewable clean energy. Compared with inorganic solar cells, organic polymer solar cells is simple, low cost, flexible and easy to large areas of manufacturing. It is the current photovoltaic research hot spots in the area. This paper mainly studies the halogenated alkanes doped polymer heterojunction solar cells and properties, and application to flexible photovoltaic devices doped with halogenated alkanes, with wet preparation of polymer solar cells on flexible substrates. Specific content is divided into three parts:Firstly, the structure is ITO/PEDOT:PSS/P3HT:PCBM/LiF/Al polymer heterojunction photovoltaic devices, and the structure is ITO/PEDOT:PSS/P3HT-X:PCBM-Y/Ca/Al photovoltaic devices, made up of different model P3HT, PCBM study repetitions, repetitions of the experiments concluded that device has a very good, electro-optical conversion efficiency between in1.5%-2.2%. Preparation for the structure of ITO/PEDOT:PSS/P3HT:PC61BM/Ca/Al polymer photovoltaic device, studying the effect of annealing temperature on properties of devices, study concludes that vacuum140℃annealing20min, the best performance devices.Secondly, preparation for the structure of ITO/PEDOT:PSS/PCPDTBT:PCxBM/Al photovoltaic devices, study different proportion PC61BM, PC71BM and PCPDTBT respectively as heterojunction photovoltaic devices performance, studies concluded that1:2toPCPDTBT:PC61BM the performance it is best.1,8-Diiodooctane (DIO) doped into PCPDTBT:PC61BM, PCPDTBT:PC71BM in heterojunction devices, was informed that PCPDTBT:PC71BM as an active layer, DIO doped with devices performance gains even more obvious. Research has different ratio of1,8-Diiodooctane doping to PCPDTBT:PC71BM solution in the devices on performance of effect, research came when the ratio of DIO and chlorobenzene of volume is1%, the devices performance is best, for that is not doping of devices, its short circuit current upgrade has2.4mA, open voltage upgrade has0.16V, photoelectric conversion efficiency improve0.61%; other ratio of doping devices are better than not doping of devices, devices performance also has clear improve. Preparation of a mass ratio of1%of DIO and chlorobenzene, PCPDTBT:PC71BM and P3HT:PCBM as active layer devices, research properties before and after annealing of change, by PCPDTBT:PC71BM and P3HT:PCBM as active devices when device properties before and after annealing, correlation studies, was informed in doped polymer heterojunction DIO began to reduce the effect of annealing temperature.Thirdly, the effects of preparation of a polymer photovoltaic device in reverse on glass substrates, the device structure for ITO/Cs2CO3/P3HT:PCBM/PEDOT, studied the effects of different heat treatment on properties of devices, study, anti reset can inhibit the leakage current of the device, improving the performance of the device, it corresponds to the current curve can be found, the open circuit voltage boost, short circuit current is increased.1,8-Diiodooctane doped in preparation of flexible photovoltaic devices, research on doping on properties of flexible photovoltaic devices. Comparison of flexible photovoltaic devices with doped DIO device with undoped DIO but annealing of glass substrates, joined DIO to improve short circuit currents and fill factor better than rigid devices after the heat treatment effect, although open-circuit voltage dropped slightly, as a result, photoelectric conversion rate has slightly improved. Join the1.8-second iodine octane, is very good to reduce the effect of annealing temperature, flexible substrates for high temperature annealing device is not done, has a great significance. |
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