| As a kind of renewable clean energy, solar energy is inexhaustible, safe and reliable, it is not subject to regions and can be mass produced, that’s why solar energy attracts so much attention and becomes one of new energy development by the scientists. The raw materials of organic solar cell are cheap and can be gained widely, organic materials have high absorption coefficient and good photovoltaic effect, organic solar cell can be prepared in a flexible and simple way in flexible substrates. As a hole transport layer and electron blocking layer of organic solar cells, anode buffer layer is an important part and can greatly improve the device performance. This paper mainly studies the following aspects:1. The research on technological parameters of organic solar cell based on P3HT/PCBM: we choose chlorobenzene and o-dichlorobenzene as solvent liquid precursor, results exhibit the efficiency of device using o-dichlorobenzene is 1.66%, which is 20% higher than device using chlorobenzene; Device efficiency fabricated in o-dichlorobenzene doped with 3% 1,8-two iodine octane is 1.74%, which is higher than that with no dope; The quality ratio of P3HT/PCBM two kinds material is 1:1 and 1:0.8, the device efficiency is 1.54% and 1.65% respectively; When the annealing time is 20 minutes, we change the annealing temperature, the results show that when the temperature is 130 ℃ to 150 ℃, the device has a higher conversion efficiency, about 1.60%; We set the annealing temperature as 130 ℃ and change the annealing time, the conclusion is that when the annealing time is 20 minute, device efficiency is as high as 1.75%; Change the speeds of the spin coating when prepare the active layer which is 800, 1100, 1300 and 1100 respectively, the device efficiency fabricated in 1100 RPM is as high as 1.72%; We change the thickness of the cathode buffer layer(LiF) which is 0.5 nm and 1 nm respectively, the conclusion is that the device performance with 1nm Li F is better.2. Study on organic solar cell based on PEDOT/PSS anode buffer layer: We adjust the thickness of PEDOT/PSS through changing the spin coating speed of PEDOT/PSS which is 3000, 4000, 5000 RPM, results show that the when the speed is 4000, the device efficiency up to 1.69%; PEDOT/PSS is mixed with dimethyl sulfoxide of volume ratio of 2%, 4% and 6% respectively, results show that the device conversion efficiency doped 4% dimethyl sulfoxide is up to 1.75%; PEDOT/PSS is doped with isopropyl alcohol in volume ratio 5%, 10% and 15% respectively, the results show that the device mixed with 10% isopropyl alcohol has better conversion efficiency of 1.7%.3. MoO3 prepared in solution process and its application in organic solar cell: MoO3 precursor solution is prepared by the hydrolysis of ammonium molybdate, the film is prepared in spin coating method, we analysis of thin film composition and surface morphology, verify the MoO3 application as anode buffer layer in organic solar cells.In summary, this article studies some related parameters of organic solar cell based on P3HT/PCBM, organic solar cell based on PEDOT/PSS anode buffer layer, the preparation of MoO3 anode buffer layer and its application in organic solar cell. The efficiency of organic solar cell based on P3HT/PCBM is up to 1.70%. The conversion efficiency of organic solar cell based on PEDOT/PSS anode buffer layer is up to 1.75%. |
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