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Greener, Nonhalogenated Solvent Systems for Highly Efficient Perovskite Solar Cells
Advanced Energy Materials ( IF 24.4 ) Pub Date : 2018-04-30 , DOI: 10.1002/aenm.201800177
Mozhgan Yavari 1, 2 , Mohammad Mazloum-Ardakani 2 , Somayeh Gholipour 3, 4 , Mohammad Mahdi Tavakoli 5, 6, 7 , Silver-Hamill Turren-Cruz 1, 8 , Nima Taghavinia 9, 10 , Michael Grätzel 7 , Anders Hagfeldt 1 , Michael Saliba 11
Affiliation  

All current highest efficiency perovskite solar cells (PSCs) use highly toxic, halogenated solvents, such as chlorobenzene (CB) or toluene (TLN), in an antisolvent step or as solvent for the hole transporter material (HTM). A more environmentally friendly antisolvent is highly desirable for decreasing chronic health risk. Here, the efficacy of anisole (ANS), as a greener antisolvent for highest efficiency PSCs, is investigated. The fabrication inside and outside of the glovebox showing high power conversion efficiencies of 19.9% and 15.5%, respectively. Importantly, a fully nonhalogenated solvent system is demonstrated where ANS is used as both the antisolvent and the solvent for the HTM. With this, state‐of‐the‐art efficiencies close to 20.5%, the highest to date without using toxic CB or TLN, are reached. Through scanning electron microscopy, UV–vis, photoluminescence, and X‐ray diffraction, it is shown that ANS results in similar mixed‐ion perovskite films under glovebox atmosphere as CB and TLN. This underlines that ANS is indeed a viable green solvent system for PSCs and should urgently be adopted by labs and companies to avoid systematic health risks for researchers and employees.

中文翻译:

高效钙钛矿太阳能电池的绿色环保无卤溶剂系统

当前所有效率最高的钙钛矿太阳能电池(PSC)都在反溶剂步骤中使用高毒性的卤化溶剂,例如氯苯(CB)或甲苯(TLN),或将其用作空穴传输材料(HTM)的溶剂。为了降低慢性健康风险,非常需要一种对环境更友好的抗溶剂。在这里,研究了苯甲醚(ANS)作为最高效的PSC的绿色抗溶剂的功效。杂物箱内部和外部的制造分别显示出19.9%和15.5%的高功率转换效率。重要的是,展示了一种完全无卤的溶剂系统,其中ANS既用作HTM的反溶剂又用作溶剂。这样,可以达到近20.5%的最新效率,这是迄今为止不使用有毒CB或TLN的最高效率。通过扫描电子显微镜,紫外可见光,光致发光和X射线衍射表明,在手套箱气氛下,ANS可以产生与CB和TLN类似的混合离子钙钛矿薄膜。这表明ANS确实是用于PSC的可行的绿色溶剂系统,实验室和公司应紧急采用ANS,以避免研究人员和员工的系统健康风险。
更新日期:2018-04-30
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