钝化
材料科学
钙钛矿(结构)
光伏
光电子学
电容
碘化物
钙钛矿太阳能电池
图层(电子)
分析化学(期刊)
能量转换效率
化学工程
纳米技术
光伏系统
无机化学
化学
电极
环境化学
电气工程
物理化学
工程类
作者
Seokjoo Ryu,Bumjin Gil,Beomsoo Kim,Jinhyun Kim,Byungwoo Park
标识
DOI:10.1021/acsami.3c10126
摘要
Perovskite solar cells (PSCs) are gaining significant interest as the future of photovoltaics owing to their superior performance and cost-effectiveness. Nevertheless, traps in PSCs have emerged as issues that adversely affect the efficiency and stability of the devices. In this study, the methylammonium chloride (MACl) additive and phenyltrimethylammonium iodide (PTMAI) posttreatment were applied to passivate bulk and surface defects. Furthermore, variations of the traps' quantitative spatial arrangement have been monitored by using the drive-level capacitance profiling (DLCP) analysis. A similar magnitude of trap reduction was observed for the bulk perovskite layer and two interfaces (electron transport layer (ETL)/perovskite and hole transport layer (HTL)/perovskite) with an optimal concentration of the MACl additive. However, the effect of perovskite posttreatment in reducing the trap density was much more noticeable at the HTL/perovskite interface compared to the bulk and ETL/perovskite regions. This observation was reinforced by the outcomes of the 500 h thermal stability tests at 60 °C from seven independent batches, which demonstrated a substantial suppression of trap accumulation, particularly at the HTL/perovskite interface, by an order of magnitude.
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