钝化
晶界
钙钛矿(结构)
结晶度
材料科学
能量转换效率
钙钛矿太阳能电池
粒度
光伏系统
铵
开路电压
碘化物
光电子学
化学工程
电压
纳米技术
无机化学
化学
电气工程
复合材料
图层(电子)
有机化学
工程类
微观结构
作者
Hyunjung Lee,Young-Seok Kang,Sung‐Nam Kwon,Do‐Hyung Kim,Seok‐In Na
标识
DOI:10.1002/smtd.202300948
摘要
The perovskite solar cell (PSC), which has achieved efficiencies of more than 26%, is expected to be a promising technology that can alternate silicon-based solar cells. However, the performance of PSCs is still limited due to defects and ion migration that occur at the large number of grain boundaries present in perovskite thin films. In this study, the mixed ammonium ligands passivation strategy (MAPS) is demonstrated, which combines n-octylammonium iodide (OAI) and 1,3-diaminopropane (DAP) can effectively suppress the grain boundary defects and ion migration through grain boundaries by the synergistic effect of OAI and DAP, resulting in improved efficiency and stability of PSCs. It has also been revealed that MAPS not only enhances crystallinity and reduces grain boundaries but also improves charge transport while suppressing charge recombination. The MAPS-based opaque PSC shows the best power conversion efficiency (PCE) of 21.29% with improved open-circuit voltage (VOC ) and fill factor (FF), and retained 84% of its initial PCE after 1900 h at 65 °C in N2 atmosphere. Amazingly, the MAPS-based semi-transparent PSC (STP-PSC) retained 94% of their maximum power (21.00% at around 10% AVT) after 1000 h under 1 sun illumination and MAPS-based perovskite submodule (PSM) achieved a PCE of 19.59%, which is among the highest values reported recently.
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