气候变化领域集成服务门户(CCPortal): Thermally stable, planar hybrid perovskite solar cells with high efficiency

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DOI	10.1039/c8ee02242a
	Thermally stable, planar hybrid perovskite solar cells with high efficiency
	Choi K.; Lee J.; Kim H.I.; Park C.W.; Kim G.-W.; Choi H.; Park S.; Park S.A.; Park T.
发表日期	2018
ISSN	17545692
起始页码	3238
结束页码	3247
卷号	11 期号:11
英文摘要	We report a highly effective interface engineering strategy for thermally stable perovskite solar cells (PSCs) by employing a zwitterion-modified SnO2 electron transport layer (ETL) and a dopant-free hole transport layer (HTL). A zwitterionic compound, 3-(1-pyridinio)-1-propanesulfonate, is used to modify the SnO2 ETL. The zwitterion, which forms interfacial dipoles, plays a few important roles: (1) it causes shifts in the work function of SnO2 resulting in more efficient charge extraction and an increase in the built-in potential. (2) It pulls electrons from perovskite layers to the ETL/perovskite interface, enhancing the electron transport ability. (3) Interfacial dipoles prevent back transfer of electrons from the ETL to the perovskite and suppress charge recombination. (4) Positively charged atoms in the zwitterion passivate Pb-I antisite defects, improving the stability of devices. With these desirable properties, the PSC with doped Spiro-OMeTAD obtained a power conversion efficiency of 21.43%. In addition, the PSC with the dopant-free HTL exhibited a record high efficiency of 20.5% among dopant-free polymeric HTLs using green solvents. The resulting PSCs without encapsulation showed excellent thermal stability. Accordingly, this work suggests that the use of a modified ETL and a dopant-free HTL is a promising strategy to overcome the thermal instability of planar-PSCs (P-PSCs). © The Royal Society of Chemistry 2018.
英文关键词	Cell engineering; Efficiency; Electron transport properties; Perovskite; Perovskite solar cells; Solar cells; Thermodynamic stability; Built-in potential; Charge recombinations; Electron transport layers; Interface engineering; Interfacial dipoles; Power conversion efficiencies; Thermal instabilities; Zwitterionic compounds; Lead compounds; electron; encapsulation; energy efficiency; extraction method; fuel cell; ion exchange; perovskite; polymer; solvent
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/190084
作者单位	Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), 77 Cheongam-Ro, Nam-gu, Pohang Gyeongbuk, South Korea
推荐引用方式 GB/T 7714	Choi K.,Lee J.,Kim H.I.,et al. Thermally stable, planar hybrid perovskite solar cells with high efficiency[J],2018,11(11).
APA	Choi K..,Lee J..,Kim H.I..,Park C.W..,Kim G.-W..,...&Park T..(2018).Thermally stable, planar hybrid perovskite solar cells with high efficiency.Energy & Environmental Science,11(11).
MLA	Choi K.,et al."Thermally stable, planar hybrid perovskite solar cells with high efficiency".Energy & Environmental Science 11.11(2018).