材料科学
量子点
兴奋剂
光电子学
等离子体
制作
能量转换效率
光伏系统
氧气
纳米技术
太阳能电池
电气工程
物理
医学
工程类
病理
有机化学
化学
量子力学
替代医学
作者
Hadi Tavakoli Dastjerdi,Rouhollah Tavakoli,Pankaj Yadav,Daniel Prochowicz,Michael Saliba,Mohammad Mahdi Tavakoli
标识
DOI:10.1021/acsami.9b08466
摘要
PbS quantum dots (QDs) have been extensively studied for photovoltaic applications, thanks to their facile and low-cost fabrication processing and interesting physical properties such as size dependent and tunable band gap. However, the performance of PbS QD-based solar cells is highly sensitive to the humidity level in the ambient air, which is a serious obstacle toward its practical applications. Although it has been previously revealed that oxygen doping of the hole transporting layer can mitigate the cause of this issue, the suggested methods to recover the device performance are time-consuming and relatively costly. Here, we report a low-power oxygen plasma treatment as a rapid and low-cost method to effectively recover the device performance and stability. Our optimization results show that a 10 min treatment is the best condition, resulting in an enhanced power conversion efficiency from 6.9% for the as-prepared device to 9% for the plasma treated one. Moreover, our modified device shows long-term shelf-life stability.
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