Liu Hao, Jiang Ning, Wang Jintao, Chen Shuming, Zhang Jian, Duan Yu
College of Electronic Science and Engineering, Jilin University, Changchun 130012, China.
College of Information Engineering, Yantai Institute of Technology, Yantai 264005, China.
Mater Horiz. 2025 Jan 2;12(1):217-226. doi: 10.1039/d4mh01311e.
The performance and stability of perovskite solar cells (PSCs) are critically influenced by the interfacial properties between the perovskite absorption layer and the electron transport layer (ETL). This study introduces a novel interfacial engineering approach using dipotassium 7-hydroxynaphthalene-1,3-disulfonate (K-NDS) as a multifunctional passivator to enhance both the SnO ETL and the perovskite absorber layer. The sulfonic acid groups (-SO) in K-NDS effectively fill oxygen vacancies on the SnO surface, while the hydroxyl groups (-OH) passivate dangling bonds, improving the crystallinity of the perovskite film. Additionally, the diffusion of K from the SnO ETL into the perovskite layer optimizes energy level alignment, thereby enhancing charge carrier extraction and transport. This bifacial passivation strategy has significantly improved both the power conversion efficiency (PCE) and long-term stability of PSCs. The modified devices achieved a champion PCE of 23.00% and an open-circuit voltage () of 1.172 V. Furthermore, these devices maintained 75% of their initial PCE even after 1000 hours of storage under indoor environmental conditions. This work demonstrates the effectiveness of synergistic interfacial passivation in advancing the performance and durability of PSCs.
钙钛矿太阳能电池（PSC）的性能和稳定性受到钙钛矿吸收层与电子传输层（ETL）之间界面性质的严重影响。本研究引入了一种新颖的界面工程方法，使用7-羟基萘-1,3-二磺酸钾（K-NDS）作为多功能钝化剂，以增强SnO ETL和钙钛矿吸收层。K-NDS中的磺酸基团（-SO）有效地填充了SnO表面的氧空位，而羟基（-OH）钝化了悬空键，提高了钙钛矿薄膜的结晶度。此外，K从SnO ETL扩散到钙钛矿层中优化了能级排列，从而增强了电荷载流子的提取和传输。这种双面钝化策略显著提高了PSC的功率转换效率（PCE）和长期稳定性。改性器件的最佳PCE达到23.00%，开路电压（）为1.172 V。此外，即使在室内环境条件下储存1000小时后，这些器件仍保持其初始PCE的75%。这项工作证明了协同界面钝化在提高PSC性能和耐久性方面的有效性。
