Department of Applied Physics and Materials Research Centre, The Hong Kong Polytechnic University , Hong Kong, China.
ACS Nano. 2015 Dec 22;9(12):12026-34. doi: 10.1021/acsnano.5b04858. Epub 2015 Nov 2.
Graphene has been considered as a promising material for transparent electrodes due to its advantages including ultrahigh carrier mobilities, high optical transmittance, excellent mechanical flexibility, and good stability. Solar cells with all-graphene electrodes are potentially low-cost, high-performance, and environmental friendly, which however have not been realized until now. Here, we report the fabrication of semitransparent organic photovoltaics (OPVs) with graphene transparent electrodes as both cathode and anode, which can absorb light from both sides with the power conversion efficiency up to 3.4%. Meanwhile, the OPVs have a neutral color and show the transmittance of ∼40% in the visible region, making them suitable for some special applications, such as power-generating windows and building integrated photovoltaics. This work demonstrates the great potential of graphene for the applications in carbon-based optoelectronic devices.
石墨烯因其超高载流子迁移率、高透光率、优异的机械柔韧性和良好的稳定性等优点，被认为是一种很有前途的透明电极材料。具有全石墨烯电极的太阳能电池具有低成本、高性能和环保的潜力，但直到现在还没有实现。在这里，我们报告了使用石墨烯透明电极作为阴极和阳极的半透明有机光伏器件（OPVs）的制造，其功率转换效率高达 3.4%，可以从两侧吸收光。同时，OPVs 的颜色为中性，在可见光区的透光率约为 40%，使其适用于一些特殊应用，如发电窗和建筑集成光伏。这项工作证明了石墨烯在碳基光电设备应用中的巨大潜力。
