3D/2D Core/Shell Perovskite Nanocrystals for High-Performance Solar Cells.

Small (Weinheim an der Bergstrasse, Germany)(2023)

引用 2|浏览17
暂无评分
摘要
All-inorganic lead halide perovskite nanocrystals (NCs) emerge as a rising star in photovoltaic fields on account of their excellent optoelectronic properties. However, it still remains challenging to further promote photovoltaic efficiency due to the susceptible surface and inevitable vacancies. Here, this work reports a 3D/2D core/shell perovskite heterojunction based on CsPbI NCs and its performance in solar cells. The guanidinium (GA ) rich 2D nanoshells can significantly passivate surface trap states and lower the capping ligand density, resulting in improved photoelectric properties and carrier transport and diminished nonradiative recombination centers via the hydrogen bonds from amino groups in GA ions. Consequently, an outstanding power conversion efficiency (PCE) of up to 15.53% is realized, substantially higher than the control device (13.77%). This work highlights the importance of surface chemistry and offers a feasible avenue to achieve high-performance perovskite NCs-based optoelectronic devices.
更多
查看译文
关键词
core/shell nanocrystals (NCs),heterojunctions,perovskite,solar cells
AI 理解论文
溯源树
样例
生成溯源树,研究论文发展脉络