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可綠色印刷的高效率聚合物太陽能電池 已有1人參與
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Sample TextHigh Performance Organic Solar Cells Processed by Blade Coating in Air from a Benign Food Additive Solution 最近，美國北卡羅萊納大學(xué)博士后葉龍等率先實(shí)現(xiàn)了可綠色印刷，能量轉(zhuǎn)換效率8%以上的有機(jī)太陽能電池和5%以上的全聚合物太陽能電池，相關(guān)結(jié)果發(fā)表在美國化學(xué)會Chemistry of Materials。 在該工作他們使用單一綠色溶劑以及Blade-coating技術(shù)在空氣中制備了高效率太陽能電池器件。這些結(jié)果刷新了同類器件的世界紀(jì)錄。 Solution processable conjugated organic materials have gained tremendous interest motivated by their potential of low cost, light weight and especially easy manufacturing of large-area and flexible electronics. Toxic halogen-containing solvents have been widely used in the processing of organic electronics, particularly organic photovoltaics (OPVs). To transition this technology to more commercially attractive manufacturing approaches, removing these halogenated solvents remains one of the key challenges. Our morphological (hard/soft X-ray scattering) and calorimetric characterizations reveal that using o-methylanisole, a certified food additive, as processing solvent can achieve similar crystalline properties and domain spacing/purity with that achieved by widely used binary halogenated solvents (chlorobenzene and 1,8-diiodooctane), thus yielding comparable photovoltaic performance in spin-casted films. To move a step forward, we further present the potential of o-methylanisole as processing solvent in the blade-coating of several cases of OPVs in air. Remarkably, this single nonhazardous solvent yields ~8.4% and ~5.2% efficiency in OPVs by respectively blade-coating PBDT-TSR  C71BM and all-polymeric PBDT-TS1PDIODT in ambient air, which are among the highest values for the same kind of devices. We believe this simple non-hazardous solvent approach will also be applicable in the large area roll-to-roll coating and industrial scale printing of high-efficiency OPVs in air.論文鏈接 http://pubs.acs.org/doi/abs/10.1021/acs.chemmater.6b03083 Figures for paper.png |
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