A solution-processed pillar[5]arene-based small molecule cathode buffer layer for efficient planar perovskite solar cells

doi:10.1039/c8nr00898a

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	A solution-processed pillar[5]arene-based small molecule cathode buffer layer for efficient planar perovskite solar cells
	Lei, Hongwei 1,2,3; Chen, Xiaofeng 3,4; Xue, Lingwei 3; Sun, Linhao 1; Chen, Jianjun 1; Tan, Zuojun 1; Zhang, Zhi-Guo 3; Li, Yongfang 3; Fang, Guojia 2
刊名	NANOSCALE
	2018-05-07
卷号	10 期号:17 页码:8088-8098
ISSN号	2040-3364
DOI	10.1039/c8nr00898a
英文摘要	A room-temperature solution-processed pillar[5]arene-based small molecule material, termed C3, has been designed, synthesized, and incorporated between a conventional PCBM electron transport layer (ETL) and a metal electrode to function as a single-layer cathode buffer layer (CBL) for efficient planar p-i-n perovskite solar cells (PVSCs). It has been found that C3 has a work function tunneling effect, which can decrease the work function of the Ag electrode; therefore, introduction of C3 successfully enhances the interface contact and reduces the interface barriers, which usually exist between fullerene derivatives and metal electrodes. It was also found that the C3 capping layer could improve the surface quality of PCBM, forming a smooth, dense and pinhole-free morphology with fewer surface defects. Thus, C3 can modify the interface between PCBM and Ag, enhance the diode properties of devices and facilitate electron transport through the devices; therefore, it is a very promising CBL material for PVSCs. A device with a hybrid PCBM ETL and a single cathode buffer layer of C3 exhibited a high power conversion efficiency (PCE) of 17.42% with negligible hysteresis, which was dramatically higher than that of a device based on a pure PCBM ETL. With the major advantages of a low-temperature solution process and interface modification, the excellent PCE of PVSCs on flexible substrates can exceed 13%. These results demonstrate that solution-processed pillar[5]arene-based small molecule materials can serve as high performance CBLs in PVSCs.
语种	英语
出版者	ROYAL SOC CHEMISTRY
WOS记录号	WOS:000432261400025
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/42719]
专题	中国科学院化学研究所
通讯作者	Zhang, Zhi-Guo; Fang, Guojia
作者单位	1.Huazhong Agr Univ, Coll Sci, Wuhan 430070, Hubei, Peoples R China 2.Wuhan Univ, Minist Educ China, Key Lab Artificial Micro & Nanostruct, Sch Phys & Technol, Wuhan 430072, Hubei, Peoples R China 3.Chinese Acad Sci, CAS Key Lab Organ Solids, CAS Res Educ Ctr Excellence Mol Sci, Inst Chem, Beijing 100190, Peoples R China 4.Beijing Univ Chem Technol, State Key Lab Organ Inorgan Composite, Beijing 100029, Peoples R China
推荐引用方式 GB/T 7714	Lei, Hongwei,Chen, Xiaofeng,Xue, Lingwei,et al. A solution-processed pillar[5]arene-based small molecule cathode buffer layer for efficient planar perovskite solar cells[J]. NANOSCALE,2018,10(17):8088-8098.
APA	Lei, Hongwei.,Chen, Xiaofeng.,Xue, Lingwei.,Sun, Linhao.,Chen, Jianjun.,...&Fang, Guojia.(2018).A solution-processed pillar[5]arene-based small molecule cathode buffer layer for efficient planar perovskite solar cells.NANOSCALE,10(17),8088-8098.
MLA	Lei, Hongwei,et al."A solution-processed pillar[5]arene-based small molecule cathode buffer layer for efficient planar perovskite solar cells".NANOSCALE 10.17(2018):8088-8098.