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DOI	10.1039/c9ee02983d
	Dopant-free molecular hole transport material that mediates a 20% power conversion efficiency in a perovskite solar cell
	Cao Y.; Li Y.; Morrissey T.; Lam B.; Patrick B.O.; Dvorak D.J.; Xia Z.; Kelly T.L.; Berlinguette C.P.
发表日期	2019
ISSN	1754-5692
起始页码	3502
结束页码	3507
卷号	12 期号:12
英文摘要	Organic molecular hole-transport materials (HTMs) are appealing for the scalable manufacture of perovskite solar cells (PSCs) because they are easier to reproducibly prepare in high purity than polymeric and inorganic HTMs. There is also a need to construct PSCs without dopants and additives to avoid formidable engineering and stability issues. We report here a power conversion efficiency (PCE) of 20.6% with a molecular HTM in an inverted (p-i-n) PSC without any dopants or interlayers. This new benchmark was made possible by the discovery that, upon annealing, a spiro-based dopant-free HTM (denoted DFH) containing redox-active triphenyl amine (TPA) units undergoes preferential molecular organization normal to the substrate. This structural order, governed by the strong intermolecular interactions of the DFH dioxane groups, affords high intrinsic hole mobility (1 × 10-3 cm2 V-1 s-1). Annealing films of DFH also enables the growth of large perovskite grains (up to 2 μm) that minimize charge recombination in the PSC. DFH can also be isolated at a fraction of the cost of any other organic HTM. © 2019 The Royal Society of Chemistry.
语种	英语
scopus关键词	Additives; Conversion efficiency; Efficiency; Hole mobility; Perovskite; Polymer solar cells; Redox reactions; Charge recombinations; Intermolecular interactions; Molecular organization; Perovskite grains; Power conversion efficiencies; Stability issues; Structural ordering; Triphenyl amines; Perovskite solar cells; benchmarking; energy efficiency; fuel cell; molecular analysis; perovskite; polymer
来源期刊	Energy and Environmental Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/162392
作者单位	Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada; Stewart Blusson Quantum Matter Institute, University of British Columbia, 2355 East Mall, Vancouver, BC V6T 1Z4, Canada; Department of Chemistry, University of Saskatchewan, 110 Science Place, Saskatoon, SK S7N 5C9, Canada; Department of Chemical and Biological Engineering, University of British Columbia, 2360 East Mall, Vancouver, BC V6T 1Z3, Canada; Canadian Institute for Advanced Research (CIFAR), 661 University Avenue, Toronto, ON, Canada
推荐引用方式 GB/T 7714	Cao Y.,Li Y.,Morrissey T.,et al. Dopant-free molecular hole transport material that mediates a 20% power conversion efficiency in a perovskite solar cell[J],2019,12(12).
APA	Cao Y..,Li Y..,Morrissey T..,Lam B..,Patrick B.O..,...&Berlinguette C.P..(2019).Dopant-free molecular hole transport material that mediates a 20% power conversion efficiency in a perovskite solar cell.Energy and Environmental Science,12(12).
MLA	Cao Y.,et al."Dopant-free molecular hole transport material that mediates a 20% power conversion efficiency in a perovskite solar cell".Energy and Environmental Science 12.12(2019).