Citric Acid Modulated Growth of Oriented Lead Perovskite Crystals for Efficient Solar Cells

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	Citric Acid Modulated Growth of Oriented Lead Perovskite Crystals for Efficient Solar Cells
	Guo, Yunlong 1,2; Sato, Wataru 2; Shoyama, Kazutaka 2; Halim, Henry 2; Itabashi, Yuki 2; Shang, Rui 2; Nakamura, Eiichi 2
刊名	JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
	2017-07-19
卷号	139 期号:28 页码:9598-9604
英文摘要	Solar cells made of lead perovskite crystals have attracted much attention for their high performance, but far less attention as a subject of crystal engineering. Here, we report that citric acid (CA) and chloride anion, working together, modulate crystal growth of CH3NH3PbI3, producing sub-mm-sized cuboid crystals-a morphology more suitable for close packing in a thin film than the commonly observed elongated dodecahedral morphology. By using a 15 wt % CA-doped precursor solution, we formed a single layer of large, flat, and oriented cuboid crystals with minimum crystal domain boundaries and maximum contact with neighboring layers, and fabricated an archetypal inverted-structured device of 4 mm(2) area, which showed, reproducibly and with little hysteresis, 16.75% power conversion efficiency (PCE), 26% higher than the PCE obtained for a polycrystalline film made without CA doping. Under weaker irradiation of a 1 cm(2) device, the PCE improved from 14.52% (one sun) to 20.4% (0.087 suns). Under illumination with white light emitting diode, a 10 wt % CA-doped device showed PCE of 28.1%, suggesting an advantage of PVK-SCs for indoor applications. Further studies on crystal growth modulation will be beneficial for manufacturing efficient and stable lead perovskite solar cells.
语种	英语
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/39229]
专题	化学研究所_其它
作者单位	1.Chinese Acad Sci, Inst Chem, Beijing 100190, Peoples R China 2.Univ Tokyo, Dept Chem, Bunkyo Ku, 7-3-1 Hongo, Tokyo 1130033, Japan
推荐引用方式 GB/T 7714	Guo, Yunlong,Sato, Wataru,Shoyama, Kazutaka,et al. Citric Acid Modulated Growth of Oriented Lead Perovskite Crystals for Efficient Solar Cells[J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY,2017,139(28):9598-9604.
APA	Guo, Yunlong.,Sato, Wataru.,Shoyama, Kazutaka.,Halim, Henry.,Itabashi, Yuki.,...&Nakamura, Eiichi.(2017).Citric Acid Modulated Growth of Oriented Lead Perovskite Crystals for Efficient Solar Cells.JOURNAL OF THE AMERICAN CHEMICAL SOCIETY,139(28),9598-9604.
MLA	Guo, Yunlong,et al."Citric Acid Modulated Growth of Oriented Lead Perovskite Crystals for Efficient Solar Cells".JOURNAL OF THE AMERICAN CHEMICAL SOCIETY 139.28(2017):9598-9604.