Enhanced Performance and Stability in Polymer Photovoltaic Cells Using Ultraviolet-Treated PEDOT:PSS

【摘要】 We investigate the effects of ultraviolet（UV）irradiation treatment with varying irradiation intensities for different treatment times of poly（3,4-ethylenedioxythiophene）:poly（styrenesulfonate）（PEDOT:PSS）film on the performance and stability of polymer solar cells（PSCs）based on regioregular poly（3-hexylthiophene）（P3HT）and methanofullerene[6,6]-phenyl C₆₁-butyric acid methyl ester（PCBM）blend.Ultraviolet-visible transmission spectra,x-ray photoelectron spectroscopy,contact angle measurement,atomic force microscopy and the Kelvin probe method are conducted to characterize the UV-treated PEDOT:PSS film.The results demonstrate that UV treatment can improve the power conversion efficiency（PCE）and stability of PSCs effectively.The best performance is achieved under 1200μW/cm² UV treatment for 50min.Compared to the control device,the optimized device exhibits enhanced performance with a V_ocof 0.59V,J_scof 12.3mA/cm²,fill factor of 51%,and PCE of 3.64%,increased by 3.5%,33%,8.7%and 50%,respectively.The stability of the PSCs is enhanced by2.5 times simply through the UV treatment on the PEDOT:PSS buffer layer.The improvement in the device performance and stability is attributed to the improvement in the wettability property and the increase in the work function of the PEDOT:PSS film by UV treatment,while the impact of UV treatment on the transparency of the PEDOT:PSS film is negligible.The strategy of using UV treatment to improve device performance and stability is attractive due to its simplicity,cost-effectiveness,and because it is suitable for large-scale commercial production.更多还原

【Abstract】 We investigate the effects of ultraviolet（UV） irradiation treatment with varying irradiation intensities for different treatment times of poly（3,4-ethylenedioxythiophene）:poly（styrenesulfonate）（PEDOT:PSS） film on the performance and stability of polymer solar cells（PSCs） based on regioregular poly（3-hexylthiophene）（P3HT）and methanofullerene[6,6]-phenyl C₆₁-butyric acid methyl ester（PCBM） blend.Ultraviolet-visible transmission spectra,x-ray photoelectron spectroscopy,contact angle measurement,atomic force microscopy and the Kelvin probe method are conducted to characterize the UV-treated PEDOT:PSS film.The results demonstrate that UV treatment can improve the power conversion efficiency（PCE） and stability of PSCs effectively.The best performance is achieved under 1200μW/cm² UV treatment for 50min.Compared to the control device,the optimized device exhibits enhanced performance with a V_oc of 0.59V,J_sc of 12.3 mA/cm²,fill factor of 51%,and PCE of 3.64%,increased by 3.5%,33%,8.7%and 50%,respectively.The stability of the PSCs is enhanced by2.5 times simply through the UV treatment on the PEDOT:PSS buffer layer.The improvement in the device performance and stability is attributed to the improvement in the wettability property and the increase in the work function of the PEDOT:PSS film by UV treatment,while the impact of UV treatment on the transparency of the PEDOT:PSS film is negligible.The strategy of using UV treatment to improve device performance and stability is attractive due to its simplicity,cost-effectiveness,and because it is suitable for large-scale commercial production.更多还原