Chang Wei-Chieh, Lan Ding-Hung, Lee Kun-Mu, Wang Xiao-Feng, Liu Cheng-Liang
Department of Chemical and Materials Engineering, National Central University, Taoyuan, 32001, Taiwan.
Research Center for New Generation Photovoltaics, National Central University, Taoyuan, 32001, Taiwan.
ChemSusChem. 2017 Apr 10;10(7):1405-1412. doi: 10.1002/cssc.201601711. Epub 2017 Feb 14.
This study investigated a new film-deposition technique, ultrasonic spray-coating, for use in the production of a photoactive layer of perovskite solar cells. Stable atomization and facile fabrication of perovskite thin films by ultrasonic spray-coating were achieved in a one-step method through manipulating the ink formulation (e.g., solution concentration, precursor composition, and mixing solvent ratio) and the drying kinetics (e.g., post-annealing temperature). The performance of the perovskite solar cells was mainly influenced by the intrinsic film morphology and crystalline orientation of the deposited perovskite layer. By suitable optimization of the spreading and drying conditions of the ink, ultrasonic spray-coated perovskite photovoltaic devices were obtained with a maximum power conversion efficiency of 11.30 %, a fill factor of 73.6 %, a short-circuit current of 19.7 mA cm , and an open-circuit voltage of 0.78 V, respectively. Notably, the average power efficiency reached above 10 %, attributed to the large flower-like perovskite crystal with orientation along the (1 1 2)/(2 0 0) and (2 2 4)/(4 0 0) directions. Thus, the ultrasonic spray-coating method for perovskite photoactive layers, combining advantages of good photovoltaic performance results and benefits from cost and processing, has the potential for large-scale commercial production.
本研究探讨了一种用于钙钛矿太阳能电池光活性层生产的新型薄膜沉积技术——超声喷雾涂层法。通过控制油墨配方（如溶液浓度、前驱体组成和混合溶剂比例）和干燥动力学（如退火后温度），采用一步法实现了通过超声喷雾涂层稳定雾化和轻松制备钙钛矿薄膜。钙钛矿太阳能电池的性能主要受沉积的钙钛矿层的固有薄膜形态和晶体取向影响。通过对油墨的铺展和干燥条件进行适当优化，获得了超声喷雾涂层的钙钛矿光伏器件，其最大功率转换效率为11.30%，填充因子为73.6%，短路电流为19.7 mA cm，开路电压为0.78 V。值得注意的是，平均功率效率达到10%以上，这归因于沿(1 1 2)/(2 0 0)和(2 2 4)/(4 0 0)方向取向的大花状钙钛矿晶体。因此，用于钙钛矿光活性层的超声喷雾涂层法结合了良好的光伏性能结果以及成本和加工方面的优势，具有大规模商业生产的潜力。
