期刊
SOLAR RRL
卷 6, 期 9, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/solr.202200502
关键词
interfaces; perovskite solar cells; power conversion efficiencies; SnO2; stabilities
资金
- China Postdoctoral Science Foundation [2021M690907]
- Natural Science Foundation of Henan Province [202300410073]
This study incorporates functional NHS into perovskite films to suppress nonradiative losses on the surface and grain boundary. NHS molecules form an effective barrier at the grain boundary and surface, preventing moisture permeation and reducing surface defects through interactions with the perovskite. The NHS-treated perovskite exhibits prolonged carrier lifetime and improved stability.
Nonradiative recombination on perovskite surface and grain boundary largely constrains the efficiency and stability of photovoltaic devices. Surface passivation has proven to be the most effective strategy to suppress photogenerated carrier recombination. Herein, functional N-hydroxysuccinimide (NHS) is incorporated in perovskite films by suppressing nonradiative losses both in surface and in grain boundary. The NHS molecules are located at the perovskite grain boundary and surface with good compability with the perovskite crystal network, which forms an effective barrier at the grain boundary to prevent the permeation of moisture. Equally important, the interactions between the C=O group in NHS and perovskite undercoordinated groups (Pb2+ or Pb clusters) reduce the surface defects of the perovskite, yielding a minimal energy loss. The prolonged lifetime of carriers with NHS-treated perovskites prevents the carrier quenching at the perovskite grain boundary and interface. As a result, open-circuit voltage of the solar cell is up to 1.13 V with a power conversion efficiency (PCE) of 22.21%. The stability of the device is also significantly improved, wherein devices with NHS retain 81% of the initial PCE after 1000 h at room temperature.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据