Bisconti Francesco, Giuri Antonella, Marra Gianluigi, Savoini Alberto, Fumo Paolo, Marrazzo Rosamaria, Zanardi Stefano, Corso Gianni, Po Riccardo, Biagini Paolo, Quadrivi Eleonora, Suhonen Riikka, Kraft Thomas M, Ylikunnari Mari, Listorti Andrea, Corcione Carola Esposito, Colella Silvia, Rizzo Aurora
CNR NANOTEC -, Istituto di Nanotecnologia, c/o Campus Ecotekne, Via Monteroni, 73100, Lecce, Italy.
Dipartimento di Matematica e Fisica "E. De Giorgi", Università del Salento, Campus Ecotekne, via Arnesano, 73100, Lecce, Italy.
Chempluschem. 2021 Oct;86(10):1442-1450. doi: 10.1002/cplu.202100251.
The industrialization of perovskite solar cells relies on solving intrinsic-to-material issues. To reach record efficiencies perovskite deposition needs to be finely adjusted by multi-step processes, in a humidity free glove-box environment and by means of hardly scalable techniques often associated with toxic solvents and anti-solvent dripping/bath. Herein, the use of polymeric material is proposed to deposit perovskite layers with easy processability. To the scope, a starch-polymer/perovskite composite is developed to suit slot-die coating technique requirement, allowing the deposition of hybrid halide perovskite material in a single straightforward step without the use of toxic solvents, and in uncontrolled humid environment (RH up to 70 %). The starch-polymer increases the viscosity of the perovskite precursor solutions and delays the perovskite crystallization that results in the formation of perovskite films at mild temperature (60 °C) with good morphology. These innovative inks enables the fabrication of flexible solar cells with p-i-n configuration featured by a power conversion efficiency higher than 3 %. . Overall, this approach can be exploited in the future to massively reduce perovskite manufacturing costs related to keeping the entire fabrication line at high-temperature and under nitrogen or dry conditions.
钙钛矿太阳能电池的工业化依赖于解决材料本身的问题。为了达到创纪录的效率，钙钛矿沉积需要通过多步工艺进行精细调整，在无湿度的手套箱环境中进行，并且常常借助难以扩展的技术，这些技术通常与有毒溶剂以及反溶剂滴涂/浴有关。在此，有人提出使用聚合物材料来沉积易于加工的钙钛矿层。为此，开发了一种淀粉聚合物/钙钛矿复合材料以满足狭缝式涂布技术的要求，使得在不使用有毒溶剂且在不受控制的潮湿环境（相对湿度高达70%）下，通过一个简单直接的步骤就能沉积混合卤化物钙钛矿材料。淀粉聚合物增加了钙钛矿前驱体溶液的粘度，并延迟了钙钛矿的结晶，从而在温和温度（60°C）下形成具有良好形貌的钙钛矿薄膜。这些创新型油墨能够制造出具有p-i-n结构的柔性太阳能电池，其功率转换效率高于3%。总体而言，这种方法未来可用于大幅降低与在高温以及氮气或干燥条件下保持整个生产线相关的钙钛矿制造成本。
