Li Sibo, Wang Xin, Li Huan, Fang Jun, Wang Daozeng, Xie Guanshui, Lin Dongxu, He Sisi, Qiu Longbin
School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, 150001, P. R. China.
SUSTech Energy Institute for Carbon Neutrality, Department of Mechanical and Energy Engineering, Southern University of Science and Technology, Shenzhen, 518055, P. R. China.
Small. 2023 Aug;19(34):e2301110. doi: 10.1002/smll.202301110. Epub 2023 Apr 22.
A scalable and low-cost deposition of high-quality charge transport layers and photoactive perovskite layers are the grand challenges for large-area and efficient perovskite solar modules and tandem cells. An inverted structure with an inorganic hole transport layer is expected for long-term stability. Among various hole transport materials, nickel oxide has been investigated for highly efficient and stable perovskite solar cells. However, the reported deposition methods are either difficult for large-scale conformal deposition or require a high vacuum process. Chemical bath deposition is supposed to realize a uniform, conformal, and scalable coating by a solution process. However, the conventional chemical bath deposition requires a high annealing temperature of over 400 °C. In this work, an amino-alcohol ligand-based controllable release and deposition of NiO using chemical bath deposition with a low calcining temperature of 270 °C is developed. The uniform and conformal in-situ growth precursive films can be adjusted by tuning the ligand structure. The inverted structured perovskite solar cells and large-area solar modules reached a champion PCE of 22.03% and 19.03%, respectively. This study paves an efficient, low-temperature, and scalable chemical bath deposition route for large-area NiO thin films for the scalable fabrication of highly efficient perovskite solar modules.
高质量电荷传输层和光活性钙钛矿层的可扩展且低成本沉积是大面积高效钙钛矿太阳能组件和串联电池面临的重大挑战。具有无机空穴传输层的倒置结构有望实现长期稳定性。在各种空穴传输材料中，氧化镍已被用于高效稳定的钙钛矿太阳能电池研究。然而，已报道的沉积方法要么难以进行大规模的保形沉积，要么需要高真空工艺。化学浴沉积有望通过溶液法实现均匀、保形且可扩展的涂层。然而，传统的化学浴沉积需要超过400°C的高退火温度。在这项工作中，开发了一种基于氨基醇配体的可控释放和沉积氧化镍的方法，采用化学浴沉积，煅烧温度低至270°C。通过调整配体结构可以调节均匀且保形的原位生长前驱体薄膜。倒置结构的钙钛矿太阳能电池和大面积太阳能组件的最高光电转换效率分别达到了22.03%和19.03%。这项研究为大面积氧化镍薄膜的可扩展制造铺设了一条高效、低温且可扩展的化学浴沉积路线用于高效钙钛矿太阳能组件的制造。
