Thomas Green

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We demonstrate four- and two-terminal perovskite-perovskite tandem solar cells with ideally matched band gaps. We develop an infrared-absorbing 1.2-electron volt band-gap perovskite, FA0.75Cs0.25Sn0.5Pb0.5I3, that can deliver 14.8% efficiency. By combining this material with a wider-band gap FA0.83Cs0.17Pb(I0.5Br0.5)3 material, we achieve monolithic(More)
First, it does the work of the traditional Lapse constraint (cf. Selkirk 1984) preventing a metrical foot from becoming too large and hence imposes an upper bound of binarity. Second, it prevents feet from drifting too far apart--at most one unparsed syllable can intervene (a constraint similar to this effect was independently discovered by Kager 1994);(More)
According to Myers [1]: “‘Visual Programming’ (VP) refers to any system that allows the user to specify a program in a two-(or more)-dimensional fashion. Although this is a very broad definition, conventional textual languages are not considered two-dimensional since the compilers or interpreters process them as long, one-dimensional streams.” This(More)
Hybrid metal-halide perovskites have potential as cost-effective gain media for laser technology because of their superior optoelectronic properties. Although lead-halide perovskites have been most widely studied to date, tin-based perovskites have been proposed as a less toxic alternative. In this Letter, we show that amplified spontaneous emission (ASE)(More)
A highly new charged cyclodextrin (CD) derivatives, (6-O-carboxymethyl-2,3-di-O-methyl)cyclomaltoheptaoses (CDM-beta-CDs), was synthesized and characterized as anionic reagents for capillary electrophoresis (CE) in an electrokinetic chromatography mode of separation. Substitution with dimethyl groups at the secondary hydroxyl sites of the CD is aimed at(More)