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DOI	10.1039/c6ee03201j
	Tailoring metal halide perovskites through metal substitution: Influence on photovoltaic and material properties
	Klug M.T.; Osherov A.; Haghighirad A.A.; Stranks S.D.; Brown P.R.; Bai S.; Wang J.T.-W.; Dang X.; Bulović V.; Snaith H.J.; Belcher A.M.
发表日期	2017
ISSN	17545692
起始页码	236
结束页码	246
卷号	10 期号:1
英文摘要	We present herein an experimental screening study that assesses how partially replacing Pb in methylammonium lead triiodide perovskite films with nine different alternative, divalent metal species, B′ = {Co, Cu, Fe, Mg, Mn, Ni, Sn, Sr, and Zn}, influences photovoltaic performance and optical properties. Our findings indicate the perovskite film is tolerant to most of the considered homovalent metal species with lead-cobalt compositions yielding the highest power conversion efficiencies when less than 6% of the Pb2+ ions are replaced. Through subsequent materials characterisation, we demonstrate for the first time that partially substituting Pb2+ at the B-sites of the perovskite lattice is not restricted to Group IV elements but is also possible with at least Co2+. Moreover, adjusting the molar ratio of Pb:Co in the mixed-metal perovskite affords new opportunities to tailor the material properties while maintaining stabilised device efficiencies above 16% in optimised solar cells. Specifically, crystallographic analysis reveals that Co2+ incorporates into the perovskite lattice and increasing its concentration can mediate a crystal structure transition from the cubic to tetragonal phase at room-temperature. Likewise, Co2+ substitution continually modifies the perovskite work function and band edge energies without either changing the band gap or electronically doping the intrinsic material. By leveraging this orthogonal dimension of electronic tunability, we achieve remarkably high open-circuit voltages up to 1.08 V with an inverted device architecture by shifting the perovskite into a more favourable energetic alignment with the PEDOT:PSS hole transport material. © The Royal Society of Chemistry 2017.
英文关键词	Characterization; Conducting polymers; Crystal structure; Efficiency; Energy gap; Lead compounds; Metal halides; Metals; Open circuit voltage; Optical properties; Perovskite; Semiconductor doping; Single crystals; Solar cells; Crystallographic analysis; Electronic tunability; Halide perovskites; Hole transport materials; Materials characterisation; Photovoltaic performance; Power conversion efficiencies; Structure transitions; Perovskite solar cells; concentration (composition); crystal structure; crystallography; energy efficiency; experimental study; fuel cell; halide; performance assessment; perovskite; photovoltaic system; solar power
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/190598
作者单位	Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, United States; Department of Physics, University of Oxford, Clarendon Laboratory, Parks Road, Oxford, OX1 3PU, United Kingdom; Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, MA 02139, United States; Cavendish Laboratory, JJ Thomson Avenue, Cambridge, CB3 0HE, United Kingdom; Department of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, United States; Biomolecular and Organics Electronics, IFM, Linköping University, Linköping, 58183, Sweden; Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, United States; Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, MA 02139, United States; Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, United States; Koch Institute for Integrative Cancer Re...
推荐引用方式 GB/T 7714	Klug M.T.,Osherov A.,Haghighirad A.A.,et al. Tailoring metal halide perovskites through metal substitution: Influence on photovoltaic and material properties[J],2017,10(1).
APA	Klug M.T..,Osherov A..,Haghighirad A.A..,Stranks S.D..,Brown P.R..,...&Belcher A.M..(2017).Tailoring metal halide perovskites through metal substitution: Influence on photovoltaic and material properties.Energy & Environmental Science,10(1).
MLA	Klug M.T.,et al."Tailoring metal halide perovskites through metal substitution: Influence on photovoltaic and material properties".Energy & Environmental Science 10.1(2017).