Organic/Inorganic Hybrid Photovoltaic Device And Electrode Modification

Due to the depletion of resources, aggravation of pollution, renewable energy research is an effective way to solve the energy crisis. So far, some achievements of inorganic solar cells had been achieved for its stable performance, high efficiency. But it is constrained for its expensive cost and complex process. For organic solar cells, its advantages of low cost, less pollution and extensive production cause a lot of attention except of its low efficiency comparing with inorganic solar cells. Now the combination of advantages of both inorganic and organic solar cells and the construction of hybrid solar cells have become the research focus. This thesis is divided into three parts:First, we fabricate inverted structure organic solar cell based on C60/CuPc and sputter a layer of Ga2O3 film as modification layer of ITO substrate using Magnetron Sputtering. The efficiency, short-circuit current and fill factor of inverted structure organic solar of ITO/Ga203/BCP/C6o/CuPc/MoO3/Al have been increased. The efficiency is improved by 30% through the optimization of Ga2O3 layer.Second, we research PbI2 is a kind of electron donor materials and make organic-inorganic hybrid solar cell based on both PbI2.The structure of the device is ITO/CuI/PbI2/C60/Alq3/Al and ITO/CuI/PbI2/PTCDA/Alq3/Al that C60 and PTCDA do the electron acceptor materials respectively. Finally, we find that when using C6o as electron acceptor material, open circuit voltage of the device is higher. Because the LUMO energy level of C6o is higher and the absorption light of C6o is less, so a small short circuit current is caused. When we use PTCDA as electron acceptor material, short circuit current of the device is higher, and the open circuit voltage is small, the result reverses with the C60.Last, we further optimize organic-inorganic solar cell of ITO/CuI/PbI2/C60/Alq3/Al structure by controlling the speed ratio of PbI2:C6o into doped layer and changing the temperature of PbI2.Finally,we find that the transmission efficiency of the cavity is higher and the efficiency is improved by 40% through the two methods.