期刊
NANO ENERGY
卷 49, 期 -, 页码 614-624出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.nanoen.2018.05.003
关键词
Vapour assisted solution process (VASP); Lead free perovskite; (CH3NH3)(3)Bi2I9; Morphological tailoring; High resolution X-ray photoelectron (HAXPES) spectroscopy
类别
资金
- Marie Curie COFUND fellowship
- Welsh Assembly Government funded Ser-Cymru Solar Project
- Swedish research council
- European Union's Horizon research and innovation programme under the Marie Sklodowska-Curie [663830]
- Engineering and Physical Sciences Research Council [EP/S001336/1, EP/R016666/1] Funding Source: researchfish
- EPSRC [EP/I019278/1, EP/L010372/1, EP/S001336/1, EP/N020863/1, EP/R016666/1] Funding Source: UKRI
We present a controlled, stepwise formation of methylammonium bismuth iodide (CH3NH3)(3)Bi2I9 perovskite films prepared via the vapour assisted solution process (VASP) by exposing BiI3 films to CH3NH3I (MAI) vapours for different reaction times, (CH3NH3)(3)Bi2I9 semiconductor films with tunable optoelectronic properties are obtained. Solar cells prepared on mesoporous TiO2 substrates yielded hysteresis-free efficiencies upto 3.17% with good reproducibility. The good performance is attributed mainly to the homogeneous surface coverage, improved stoichiometry, reduced metallic content in the bulk, and desired optoelectronic properties of the absorbing material. In addition, solar cells prepared using pure BiI3 films without MAI exposure achieved a power conversion efficiency of 0.34%. The non-encapsulated (CH3NH3)(3)Bi2I9 devices were found to be stable for as long as 60 days with only 0.1% drop in efficiency. This controlled formation of (CH3NH3)(3)Bi2I9 perovskite films highlights the benefit of the VASP technique to optimize material stoichiometry, morphology, solar cell performance, and long-term durability.
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