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Báo cáo hóa học: " Effects of pentacene-doped PEDOT:PSS as a holeconducting layer on the performance characteristics of polymer photovoltaic cells"

Tuyển tập các báo cáo nghiên cứu về hóa học được đăng trên tạp chí hóa hoc quốc tế đề tài : Effects of pentacene-doped PEDOT:PSS as a holeconducting layer on the performance characteristics of polymer photovoltaic cells | Kim et al. Nanoscale Research Letters 2012 7 5 http www.nanoscalereslett.eom content 7 1 5 o Nanoscale Research Letters a SpringerOpen Journal NANO IDEA Open Access Effects of pentacene-doped PEDOT PSS as a holeconducting layer on the performance characteristics of polymer photovoltaic cells Hyunsoo Kim Jungrae Lee Sunseong Ok and Youngson Choe Abstract We have investigated the effect of pentacene-doped poly 3 4-ethylenedioxythiophene poly 4-styrenesulfonate PEDOT PSS films as a hole-conducting layer on the performance of polymer photovoltaic cells. By increasing the amount of pentacene and the annealing temperature of pentacene-doped PEDOT PSS layer the changes of performance characteristics were evaluated. Pentacene-doped PEDOT PSS thin films were prepared by dissolving pentacene in 1-methyl-2-pyrrolidinone solvent and mixing with PEDOT PSS. As the amount of pentacene in the PEDOT PSS solution was increased UV-visible transmittance also increased dramatically. By increasing the amount of pentacene in PEDOT PSS films dramatic decreases in both the work function and surface resistance were observed. However the work function and surface resistance began to sharply increase above the doping amount of pentacene at 7.7 and 9.9 mg respectively. As the annealing temperature was increased the surface roughness of pentacene-doped PEDOT PSS films also increased leading to the formation of PEDOT PSS aggregates. The films of pentacene-doped PEDOT PSS were characterized by AFM SEM UV-visible transmittance surface analyzer surface resistance and photovoltaic response analysis. Keywords electronic materials polymers vapor deposition electrochemical measurement electrochemical properties Background Recently among the photovoltaic cells considered as renewable energy sources organic photovoltaic cells such as nanoscale polymer semiconductors have been intensively developed 1 . As alternative technologies to conventional photovoltaic cells polymer bulk-heterojunction BHJ .