The fabrication of organic solar cells from aqueous dispersions of photoactive nanoparticles has recently attracted the interest of the photovoltaic community, since these dispersions offer an eco‐friendly solution for the fabrication of solar cells, avoiding the use of toxic solvents. In this work, aqueous dispersions of pure poly[n‐9′‐heptadecanyl‐2,7‐carbazole‐alt‐5,5‐(4′,7′‐di‐2‐thienyl‐2′,1′,3′‐benzothiadiazole)] (PCDTBT) and [6,6]‐phenyl‐C₇₁‐butyric acid methyl ester (PC₇₁BM) nanoparticles, as well as of composite PC₇₁BM:PCDTBT nanoparticles, are prepared using the nanoprecipitation postpolymerization method. These dispersions are subsequently used to form the active layer of organic photovoltaic cells. Thin films of PC₇₁BM and PCDTBT are obtained by spray deposition of the nanoparticles' dispersions, and are characterized using a combination of spectroscopic and microscopic techniques. Photovoltaics that incorporate these active layers are fabricated thereafter. The impact of the annealing temperature and of the composition of the active layer on the efficiency of the solar cells is studied.

中文翻译：

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纳米沉淀法制备的PCDTBT：PC71BM光伏油墨

由光活性纳米粒子的水分散体制造有机太阳能电池最近引起了光伏界的关注，因为这些分散体为制造太阳能电池提供了一种生态友好的解决方案，避免了使用有毒溶剂。在这项工作中，纯聚[N-9'- heptadecanyl -2,7-咔唑的水性分散体ALT -5,5-（4'，7'-二-2-噻吩基2'，1'，3' -[苯并噻二唑]]（PCDTBT）和[6,6]-苯基-C _71-丁酸甲酯（PC ₇₁ BM）纳米颗粒，以及复合PC ₇₁ BM：PCDTBT纳米颗粒，都是使用纳米沉淀后聚合方法制备的。这些分散体随后用于形成有机光伏电池的活性层。PC薄膜₇₁ BM和PCDTBT是通过喷雾沉积纳米粒子的分散体而获得的，并结合了光谱技术和显微镜技术对其进行了表征。此后制造结合了这些有源层的光伏。研究了退火温度和活性层组成对太阳能电池效率的影响。