The CdS sensitized quantum dots solar cells graphene oxide-titanium dioxide (GO-TiO₂) nanocomposite photoanode have been fabricated using a solvent modified successive ionic layer adsorption and reaction method. The graphene has a large absorption band of white light for that we have used graphene for graphene-TiO₂ nanocomposite. The graphene-TiO₂ nanocomposite photoanode has been deposited onto FTO using doctor blade method as a photoanode to obtained a negative capacitance. Quantum dots could increase the efficiency of solar cells and make it possible to capture the energetic electrons and transmit them to the material type acceptor such as the TiO₂ has been used for severely photovoltaic cells (PV-cells). From a single absorbed photon upon relaxation of the primary electron-hole pair excited by light the GO can create a lot number of pairs of electron-hole. So that the excess excitation energy will not be lost in the form of phonons or heat, The GO transfers the excess excitation energy to other carriers to produce hot charge carriers in the conduction band of the acceptor material. The particular behavior from the positive to negative capacitance due to the injection of carriers charges from the FTO electrode into TiO₂ has been confirmed by the experimental measurement of the capacitance versus voltage (C-V). We have simulated the I-V and P-V characteristics of equivalent circuits of the solar cell. By using the method of Newton-Raphson the studied models are then employed through the involvement by writing matlab programs.

利用溶剂改性的连续离子层吸附和反应方法制备了CdS敏化量子点太阳能电池氧化石墨烯-二氧化钛（GO-TiO ₂）纳米复合光阳极。石墨烯具有大的白光吸收带，因为我们已经将石墨烯用于石墨烯-TiO ₂纳米复合材料。使用刮刀法将石墨烯-TiO ₂纳米复合光阳极沉积在FTO上作为光阳极，以获得负电容。量子点可以提高太阳能电池的效率，并有可能捕获高能电子并将其传输到材料类型的受体（例如TiO _2）已用于严格的光伏电池（PV电池）。从单个吸收的光子在被光激发的一次电子-空穴对弛豫之后，GO可以产生许多对电子-空穴。因此，多余的激发能不会以声子或热量的形式损失。GO将多余的激发能传递给其他载流子，从而在受体材料的导带中产生热电荷载流子。由于载流子电荷从FTO电极注入TiO _2中，从正电容到负电容的特殊行为已经通过电容对电压（CV）的实验测量得到了证实。我们已经模拟了太阳能电池等效电路的IV和PV特性。通过使用Newton-Raphson的方法，然后通过编写matlab程序参与研究模型。