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DOI	10.1039/c8ee00580j
	Improving the stability and performance of perovskite solar cells: Via off-the-shelf post-device ligand treatment
	Zhang H.; Ren X.; Chen X.; Mao J.; Cheng J.; Zhao Y.; Liu Y.; Milic J.; Yin W.-J.; Grätzel M.; Choy W.C.H.
发表日期	2018
ISSN	17545692
起始页码	2253
结束页码	2262
卷号	11 期号:8
英文摘要	While metal halide perovskite solar cells (PVSCs) have drawn intense attention due to their high solar-to-power conversion efficiency (PCE), their practical application is hampered by their poor long-term stability against moisture. Although strategies have been reported to solve this issue, these methods are introduced during core-device fabrication processes which will increase the risk of introducing unexpected impurities during the fabrication. Herein, we introduce the first kind of simple post-device ligand (PDL) treatment to significantly improve the PCE of completely fabricated PVSCs from 18.7% to 20.13%. Meanwhile, the stability of the treated devices without any encapsulation remarkably improves, with 70% PCE maintained under ambient conditions after a 500-hour maximum-power-point tracking test, while the control unencapsulated device will completely break down within 100 hours. Equally important is that this post-device treatment shows a special 'stitching effect', namely repairing the as-fabricated 'poor devices' by healing the defects of the perovskite active region, and can improve the PCE by over 900%. We also experimentally and theoretically study the fundamental mechanism of the improvement. Consequently, our approach greatly improves the production yield of high-quality PVSCs and their module performances as well as the reduction of lead-waste. Additionally, the treatment is an off-the-shelf post-device approach that can be integrated into any existing perovskite-device fabrication, offering a general strategy to improve the stability and performance of perovskite optoelectronic devices. © 2018 The Royal Society of Chemistry.
英文关键词	Fabrication; Ligands; Maximum power point trackers; Metal halides; Optoelectronic devices; Perovskite; Solar cells; Stability; Ambient conditions; Device fabrications; Fundamental mechanisms; Halide perovskites; Long term stability; Maximum Power Point Tracking; Module performance; Power conversion efficiencies; Perovskite solar cells; acoustic equipment; efficiency measurement; electronic equipment; encapsulation; energy efficiency; experimental study; fuel cell; ligand; performance assessment; perovskite
语种	英语
来源期刊	Energy & Environmental Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/190172
作者单位	Department of Electrical and Electronic Engineering, University of Hong Kong, Pok Fu Lam Road, Hong Kong SAR, Hong Kong; Soochow Institute for Energy and Materials Innovations (SIEMIS), College of Physics, Optoelectronics and Energy, Collaborative Innovation Centre of Suzhou Nano Science and Technology, Soochow University, Suzhou, 215006, China; Laboratory for Photonics and Interfaces, Institute of Chemical Sciences and Engineering, School of Basic Sciences, Ecole Polytechnique Fédérale de Lausanne, Lausanne, CH-1015, Switzerland
推荐引用方式 GB/T 7714	Zhang H.,Ren X.,Chen X.,et al. Improving the stability and performance of perovskite solar cells: Via off-the-shelf post-device ligand treatment[J],2018,11(8).
APA	Zhang H..,Ren X..,Chen X..,Mao J..,Cheng J..,...&Choy W.C.H..(2018).Improving the stability and performance of perovskite solar cells: Via off-the-shelf post-device ligand treatment.Energy & Environmental Science,11(8).
MLA	Zhang H.,et al."Improving the stability and performance of perovskite solar cells: Via off-the-shelf post-device ligand treatment".Energy & Environmental Science 11.8(2018).