Advanced Functional Materials and Devices (AFMD) Group

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Effect of substrate polishing on the growth of graphene on 3C-SiC(111)/Si(111) by high temperature annealing.

Nanotechnology 27:18 (2016) 185601

Authors:

B Gupta, I Di Bernardo, P Mondelli, A Della Pia, MG Betti, F Iacopi, C Mariani, N Motta

Abstract:

We analyse the effects of substrate polishing and of the epilayer thickness on the quality of graphene layers grown by high temperature annealing on 3C-SiC(111)/Si(111) by scanning tunnelling microscopy, x-ray photoelectron spectroscopy, Raman spectroscopy, low energy electron diffraction and high resolution angle resolved photoemission spectroscopy. The results provide a comprehensive set of data confirming the superior quality of the graphene layers obtained on polished substrates, and the limitations of the growth obtained on unpolished surfaces.
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Influence of Meso and Nanoscale Structure on the Properties of Highly Efficient Small Molecule Solar Cells

Advanced Energy Materials Wiley 6:4 (2016)

Authors:

Tobias Moench, Pascal Friederich, Felix Holzmueller, Bogdan Rutkowski, Johannes Benduhn, Timo Strunk, Christian Koerner, Koen Vandewal, Aleksandra Czyrska‐Filemonowicz, Wolfgang Wenzel, Karl Leo
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Structured organic–inorganic perovskite toward a distributed feedback laser

Advanced Materials Wiley 28:5 (2015) 923-929

Authors:

Michael Saliba, Simon Wood, Jay Patel, Pabitra Nayak, Jian Huang, Jack Alexander-Webber, Bernard Wenger, Samuel Stranks, Maximilian Hörantner, Jacob Wang, Robin Nicholas, Laura Herz, Michael Johnston, Stephen Morris, Henry Snaith, Moritz Riede

Abstract:

A general strategy for the in-plane structuring of organic-inorganic perovskite films is presented. The method is used to fabricate an industrially relevant distributed feedback (DFB) cavity, which is a critical step towards all-electrially pumped injection laser diodes. This approach opens the prospects of perovskite materials for much improved optical control in LEDs, solar cells and also toward applications as optical devices.
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Transient Response of Organo-Metal-Halide Solar Cells Analyzed by Time-Resolved Current-Voltage Measurements

Photonics MDPI 2:4 (2015) 1101-1115

Authors:

M Greyson Christoforo, Eric T Hoke, Michael D McGehee, Eva L Unger
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Nanowire apparatuses and methods

(2015) 61708432

Authors:

EC Garnett, ML Brongersma, Y Cui, MD McGehee, MG Christoforo, W Cai

Abstract:

Aspects of the present disclosure are directed to apparatuses and methods involving nanowires having junctions therebetween. As consistent with one or more embodiments, an apparatus includes first and second sets of nanowires, in which the second set overlaps the first set. The apparatus further includes a plurality of nanowire joining recrystallization junctions, each junction including material from a nanowire of the first set that is recrystallized into an overlapping nanowire of the second set.