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可绿色印刷的高效率聚合物太阳能电池 已有1人参与
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Sample TextHigh Performance Organic Solar Cells Processed by Blade Coating in Air from a Benign Food Additive Solution 最近，美国北卡罗莱纳大学博士后叶龙等率先实现了可绿色印刷，能量转换效率8%以上的有机太阳能电池和5%以上的全聚合物太阳能电池，相关结果发表在美国化学会Chemistry of Materials。 在该工作他们使用单一绿色溶剂以及Blade-coating技术在空气中制备了高效率太阳能电池器件。这些结果刷新了同类器件的世界纪录。 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.论文链接 http://pubs.acs.org/doi/abs/10.1021/acs.chemmater.6b03083  Figures for paper.png |
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2016-09-23 04:04:03, 1.18 M
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