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DOI	10.1039/c9ee00751b
	An interface stabilized perovskite solar cell with high stabilized efficiency and low voltage loss
	Yoo J.J.; Wieghold S.; Sponseller M.C.; Chua M.R.; Bertram S.N.; Hartono N.T.P.; Tresback J.S.; Hansen E.C.; Correa-Baena J.-P.; Bulović V.; Buonassisi T.; Shin S.S.; Bawendi M.G.
发表日期	2019
ISSN	17545692
起始页码	2192
结束页码	2199
卷号	12 期号:7
英文摘要	Stabilization of the crystal phase of inorganic/organic lead halide perovskites is critical for their high performance optoelectronic devices. However, due to the highly ionic nature of perovskite crystals, even phase stabilized polycrystalline perovskites can undergo undesirable phase transitions when exposed to a destabilizing environment. While various surface passivating agents have been developed to improve the device performance of perovskite solar cells, conventional deposition methods using a protic polar solvent, mainly isopropyl alcohol (IPA), results in a destabilization of the underlying perovskite layer and an undesirable degradation of device properties. We demonstrate the hidden role of IPA in surface treatments and develop a strategy in which the passivating agent is deposited without destabilizing the high quality perovskite underlayer. This strategy maximizes and stabilizes device performance by suppressing the formation of the perovskite δ-phase and amorphous phase during surface treatment, which is observed using conventional methods. Our strategy also effectively passivates surface and grain boundary defects, minimizing non-radiative recombination sites, and preventing carrier quenching at the perovskite interface. This results in an open-circuit-voltage loss of only ∼340 mV, a champion device with a power conversion efficiency of 23.4% from a reverse current-voltage scan, a device with a record certified stabilized PCE of 22.6%, and enhanced operational stability. In addition, our perovskite solar cell exhibits an electroluminescence external quantum efficiency up to 8.9%. © The Royal Society of Chemistry 2019.
英文关键词	Efficiency; Grain boundaries; Lead compounds; Open circuit voltage; Optoelectronic devices; Perovskite; Surface treatment; External quantum efficiency; Grain-boundary defects; Non-radiative recombinations; Open circuit voltage loss; Operational stability; Polycrystalline perovskite; Power conversion efficiencies; Stabilized efficiency; Perovskite solar cells; electronic equipment; energy efficiency; fuel cell; operations technology; performance assessment; perovskite; stabilization
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/189875
作者单位	Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, United States; Department of Mechanical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, United States; Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, United States; Center for Nanoscale Systems, Harvard University, Cambridge, MA 02138, United States; Division of Advanced Materials, Korea Research Institute of Chemical Technology, 141 Gajeong-Ro, Yuseong-Gu, Daejeon, 34114, South Korea
推荐引用方式 GB/T 7714	Yoo J.J.,Wieghold S.,Sponseller M.C.,et al. An interface stabilized perovskite solar cell with high stabilized efficiency and low voltage loss[J],2019,12(7).
APA	Yoo J.J..,Wieghold S..,Sponseller M.C..,Chua M.R..,Bertram S.N..,...&Bawendi M.G..(2019).An interface stabilized perovskite solar cell with high stabilized efficiency and low voltage loss.Energy & Environmental Science,12(7).
MLA	Yoo J.J.,et al."An interface stabilized perovskite solar cell with high stabilized efficiency and low voltage loss".Energy & Environmental Science 12.7(2019).