Study On P3HT: PCBM Based Flexible Organic Polymer Solar Cells

The flexible solar cells, which a kind of thin film solar cells, can be applied tosolar backpack, solar tents, solar cars and solar sailboats. Photovoltaic buildingintegration is an important application fields, it can be integrated in the Windows orhouse inside and outside the wall. In many ways the flexible solar cells play animportant and irreplaceable role. Besides, the flexible solar cells can use roll-to-rollproduction technology, convenient in producing in large area, which makes it costgreatly reduced. A wide range of commercial potential is tremendous, So, I chooseflexible organic polymer solar cell as the subject in this article, and to analyze andimprovement it from the device structure.Flexible solar cell is an ideal energy source to many modern mobile electronicdevices, Flexible, light weight has become a important requirement of the chargingequipment, The research object of this article is flexible organic polymer solar cells.This paper analyzes the main reasons which influence the efficiency of the organicpolymer solar cells, mainly from two aspects to explore it. One is solar battery anodebuffer layer, the other is a new type of battery anode. In order to achieve the ultimategoal of improving the photoelectric conversion efficiency, we improve the flexiblesolar cells from the basic structure.Anode buffer layer of polymer solar cells had a great influence on theperformance of the battery, is an important aspect we must continue to improve, Inthis article, we creatively use two different materials to composite anode buffer layerformation, and uses the P3HT: PCBM as the active layer to fabricate double bufferlayer polymer solar cells, by spin coating method and the evaporation method,through the optimization of material thickness and combination order to enhance theperformance of the device.In order to research the effect of double buffer layer, another two groupsof single buffer layer devices was prepared as an contrast experiment, The device structure is: the first group, ITO/PTFE/P3HT: PCBM/PTFE/Al; The second group,ITO/PEDOT:PSS/P3HT:PCBM/PTFE/Al; The third group, ITO/PTFE/PEDOT:PSS/P3HT:PCBM/PTFE/Al. we test the characteristics of photovoltaic solar cells byexperiments, analysis and discussion the causes of the problems. Results show that theshort circuit current (Jsc) of double buffer layer devices increased by2.43%, the fillfactor (FF) increased by9.38%, the photoelectric conversion efficiency (PCE)increased by6.7%.The solar battery anode electrode has been explored in this paper, and we use thebrush to improve the preparation of electrodes and the active layer of film material offilm form, and adopt the method of embedded within the PEDOT layer PTFE improvethe charge transport properties of the electrode, through transparency test, electricalconductivity measurement, the determination of spectral absorption, and the finaldetermination of the I-V curve, proved the multiple electrode of reliable and stable.And the thickness of the PTFE was prepared by changing the multiple electrodeclosest to the nature of the ITO electrode device. We fabricated many groups of solarcell device based on multiple electrodes, the highest efficiency can reach2.98%.