气候变化领域集成服务门户(CCPortal): Novel p-dopant toward highly efficient and stable perovskite solar cells

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DOI	10.1039/c8ee01500g
	Novel p-dopant toward highly efficient and stable perovskite solar cells
	Seo J.-Y.; Kim H.-S.; Akin S.; Stojanovic M.; Simon E.; Fleischer M.; Hagfeldt A.; Zakeeruddin S.M.; Grätzel M.
发表日期	2018
ISSN	17545692
起始页码	2985
结束页码	2992
卷号	11 期号:10
英文摘要	Li-TFSI is the most common p-dopant for the hole conductor spiro-MeOTAD in the normal structure (n-i-p) of perovskite solar cells (PSCs), which consistently yield the highest power conversion efficiency (PCE) albeit at the risk of lower long-term operational stability. Here we successfully replace conventional Li-TFSI with Zn-TFSI2, which not only acts as a highly effective p-dopant but also enhances considerably both the photovoltaic performance and long-term stability. The incorporation of Zn-TFSI2 as a dopant for spiro-MeOTAD leads to an increase by one order in the hole mobility compared to Li-TFSI from 3.78 × 10-3 cm2 V-1 s-1 to 3.83 × 10-2 cm2 V-1 s-1. Furthermore, the device with Zn-TFSI2 showed an 80 mV higher built-in voltage and a bigger recombination resistance than the one with Li-TFSI, which were responsible for the striking increase in both the open-circuit voltage and fill factor, leading to a stabilized PCE of 22.0% for the best cells. Remarkably, the device employing Zn-TFSI2 demonstrated superb photo-stability, showing even a 2% increase in the PCE after 600 h light soaking at the maximum power point (mpp) under full sun, while the PCE of the device with Li-TFSI decreased by 20% under the same conditions. Similarly, the device with Zn-TFSI2 showed better operational stability at 50 °C resulting in a 21% decrease in the PCE after 100 h aging at the mpp under full sun while the Li-TFSI based one showed a 55% decrease. Moreover, the Zn-TFSI2 based device was capable of effectively resisting humidity compared to the one based on Li-TFSI from shelf stability monitoring (R.H. ≥ 40%) in the dark. © 2018 The Royal Society of Chemistry.
英文关键词	Hole mobility; Open circuit voltage; Perovskite; Perovskite solar cells; Stability; Built-in voltage; Long term stability; Maximum power point; Normal structure; Operational stability; Photo-stability; Photovoltaic performance; Power conversion efficiencies; Solar cells; efficiency measurement; energy efficiency; equipment; fuel cell; operations technology; performance assessment; perovskite; photovoltaic system
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/190111
作者单位	Laboratory for Photonics and Interfaces, Institute of Chemical Sciences and Engineering, School of Basic Sciences, Ecole Polytechnique Fédérale de Lausanne, Lausanne, CH-1015, Switzerland; Laboratory of Photomolecular Science, Institute of Chemical Sciences and Engineering, School of Basic Sciences, Ecole Polytechnique Fédérale de Lausanne, Lausanne, CH-1015, Switzerland; Department of Metallurgical and Materials Engineering, Karamanoglu Mehmetbey University, Karaman, Turkey; Research in Energy and Electronics, Corporate Technology, Siemens AG, München, 81739, Germany
推荐引用方式 GB/T 7714	Seo J.-Y.,Kim H.-S.,Akin S.,et al. Novel p-dopant toward highly efficient and stable perovskite solar cells[J],2018,11(10).
APA	Seo J.-Y..,Kim H.-S..,Akin S..,Stojanovic M..,Simon E..,...&Grätzel M..(2018).Novel p-dopant toward highly efficient and stable perovskite solar cells.Energy & Environmental Science,11(10).
MLA	Seo J.-Y.,et al."Novel p-dopant toward highly efficient and stable perovskite solar cells".Energy & Environmental Science 11.10(2018).