The Research Of Polymer Solar Cells Electrode Modified Materials

Polymer solar cells (PSCs) have attracted considerable attention because of their potential application in low-cost and largescale modules. At present, the research of the PSCs is focused on improvement of power conversion efficiency (PCE) and device stability for future application. The key points for increasing the PCE and stability are the design and synthesis of high efficiency photovoltaic materials and the construction of new device structures. Research is now focused on the primary between the active layer and the electrode layer. In this paper, in order to solve the existed problems of PSCs and grasp the research direction of PSCs, We choosed that the right alcohol-soluble chelate as an electrode buffer layer of materials in both conventional PSCs, which increased the power conversion efficiency and stability of the PSCs. Research and findings are summarized as follows:1、Efficient polymer solar cells (PSCs) with enhanced open-circuit voltage(Voc) are fabricated by introducing solution-processed and UV-ozone (UVO)-treatednickel acetate (O-NiAc) as an anode buffer layer. According to X-ray photoelectronspectroscopy data, NiAc partially decomposed to NiOOH during the UVO treatment.NiOOH is a dipole species, which leads to an increase in the work function (as confirmed by ultraviolet photoemission spectroscopy), thus benefitting the formation of ohmic contact between the anode and photoactive layer and leading to increased Voc. In addition, the UVO treatment improves the wettability between the substrate and solvent of the active layer, which facilitates the formation of an upper photoactive layer with better morphology. Further, the O-NiAc layer can decrease the series resistance (Rs) and increase the parallel resistance (Rp) of the devices, inducing enhanced Voc in comparison with the as-prepared NiAc-buffered control devices without UVO treatment. For PSCs based on the P3HT:PCBM system, Voc increases from 0.50 to 0.60 V after the NiAc buffer layer undergoes UVO treatment. Similarly, in the P3HT:1CBA system, the Voc value of the device with a UVO-treated NiAc buffer layer increases from 0.78 to 0.88 V, showing an enhanced power conversion efficiency of 6.64%.2、We use ZrIP as a new modification layer of the cathode to prepare high performance polymer solar cells. ZrIP electron transport layer is a transparent layer of high performance electronic collection, which can effectively change the optical field distribution of the photovoltaic active layer and the visible light range is 400-550nm.Also it can increase the absorption of visible light, can effectively increase the photocurrent, thereby increasing cell efficiency. ZrIP is applicable to traditional P3HT structure and narrow-band-based material. In AM1.5G,100 mW/cm simulated lighting conditions, the properties of the polymer solar cell that base on P3HT:PC60BM system is excellent, the photoelectric conversion efficiency is 4.47%. Department of donor material narrowband PBDTBDD efficiency has reached 8.07%. ZrIP is an ideal cathode modification layer which with good transparency, and soluble in alcohol solution, without thermal annealing, good stability, is an ideal alternative materials of Ca.