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Enhancing moisture tolerance in efficient hybrid 3D/2D perovskite photovoltaics

Koh, Teck Ming; Shanmugam, Vignesh; Guo, Xintong; Lim, Swee Sien; Filonik, Oliver; Herzig, Eva M.; Müller-Buschbaum, Peter; Swamy, Varghese; Chien, Sum Tze; Mhaisalkar, Subodh G.; Mathews, Nripan

Customer publications

Enhancing moisture tolerance in efficient hybrid 3D/2D perovskite photovoltaics

Koh, Teck Ming; Shanmugam, Vignesh; Guo, Xintong; Lim, Swee Sien; Filonik, Oliver; Herzig, Eva M.; Müller-Buschbaum, Peter; Swamy, Varghese; Chien, Sum Tze; Mhaisalkar, Subodh G.; Mathews, Nripan

Surface imperfections in perovskite films upon crystallization may trigger trap-assisted non-radiative recombination which is a dominant recombination mechanism that potentially restricts the performance of solar devices. In this work, 2D alkylammonium halide perovskites are formed on the 3D perovskite structure to passivate interfacial defects and vacancies and enhance moisture tolerance.…
Surface-initiated reversible addition-fragmentation chain transfer polymerization of chloroprene and mechanical properties of matrix-free polychloroprene nanocomposites

Zheng, Yang; Abbas, Zaid M.; Sarkar, Amrita; Marsh, Zachary; Stefik, Morgan; Benicewicz, Brian C.

Customer publications

Surface-initiated reversible addition-fragmentation chain transfer polymerization of chloroprene and mechanical properties of matrix-free polychloroprene nanocomposites

Zheng, Yang; Abbas, Zaid M.; Sarkar, Amrita; Marsh, Zachary; Stefik, Morgan; Benicewicz, Brian C.

RAFT polymerization and surface-initiated RAFT polymerization (SI-RAFT) of chloroprene was studied. The SI-RAFT polymerization rate of chloroprene was found to be slower than free solution RAFT polymerization, and further regulated by the graft density of grafted polymers. The resulting polychloroprene-grafted silica nanoparticles were directly crosslinked to obtain matrix-free polychloroprene…
Opposing Phase-Segregation and Hydrogen-Bonding Forces in Supramolecular Polymers

Chen, Senbin; Yan, Tingzi; Fischer, Matthias; Mordvinkin, Anton; Saalwächter, Kay; Thurn‐Albrecht, Thomas; Binder, Wolfgang H.

Customer publications

Opposing Phase-Segregation and Hydrogen-Bonding Forces in Supramolecular Polymers

Chen, Senbin; Yan, Tingzi; Fischer, Matthias; Mordvinkin, Anton; Saalwächter, Kay; Thurn‐Albrecht, Thomas; Binder, Wolfgang H.

Phase segregation between different macromolecules and specific weak interactions are the basis of molecular organization in many biological systems, which are held together by attractive hydrogen bonds (H-bonds) and dissociated by phase segregation. We report significant changes in the association behavior of covalent H-bonds by the phase of attached polymer…
3D Orientational Control in Self-Assembled Thin Films with Sub-5 nm Features by Light

Nickmans, Koen; Bögels, Gerardus M.; Sánchez‐Somolinos, Carlos; Murphy, Jeffrey N.; Leclère, Philippe; Voets, Ilja K.; Schenning, Albertus P. H. J.

Customer publications

3D Orientational Control in Self-Assembled Thin Films with Sub-5 nm Features by Light

Nickmans, Koen; Bögels, Gerardus M.; Sánchez‐Somolinos, Carlos; Murphy, Jeffrey N.; Leclère, Philippe; Voets, Ilja K.; Schenning, Albertus P. H. J.

While self-assembled molecular building blocks could lead to many next-generation functional organic nanomaterials, control over the thin-film morphologies to yield monolithic sub-5 nm patterns with 3D orientational control at macroscopic length scales remains a grand challenge. A series of photoresponsive hybrid oligo(dimethylsiloxane) liquid crystals that form periodic cylindrical…
Nanorattles with tailored electric field enhancement

Schnepf, Max J.; Mayer, Martin; Kuttner, Christian; Tebbe, Moritz; Wolf, Daniel; Dulle, Martin; Altantzis, Thomas; Formanek, Petr; Förster, Stephan; Bals, Sara; König, Tobias A. F.; Fery, Andreas

Customer publications

Nanorattles with tailored electric field enhancement

Schnepf, Max J.; Mayer, Martin; Kuttner, Christian; Tebbe, Moritz; Wolf, Daniel; Dulle, Martin; Altantzis, Thomas; Formanek, Petr; Förster, Stephan; Bals, Sara; König, Tobias A. F.; Fery, Andreas

Nanorattles are metallic core–shell particles with core and shell separated by a dielectric spacer. These nanorattles have been identified as a promising class of nanoparticles, due to their extraordinary high electric-field enhancement inside the cavity. Limiting factors are reproducibility and loss of axial symmetry owing to the movable metal core;…
Can high oxygen and water vapor barrier nanocomposite coatings be obtained with a waterborne formulation?

Tsurko, Evgeny S.; Feicht, Patrick; Habel, Christoph; Schilling, Theresa; Daab, Matthias; Rosenfeldt, Sabine; Breu, Josef

Customer publications

Can high oxygen and water vapor barrier nanocomposite coatings be obtained with a waterborne formulation?

Tsurko, Evgeny S.; Feicht, Patrick; Habel, Christoph; Schilling, Theresa; Daab, Matthias; Rosenfeldt, Sabine; Breu, Josef

Modification of synthetic, high aspect ratio clay with 6-aminocaprohydroxamic acid hydrochloride pushes the interaction between the polyvinyl alcohol (PVA) matrix and the filler to the level where the waterborne nanocomposite becomes rather insensitive to swelling, even at an elevated relative humidity (RH). The modifier can form strong hydrogen bonds with…
Matrix-Free Polymer Nanocomposite Thermoplastic Elastomers

Huang, Yucheng; Zheng, Yang; Sarkar, Amrita; Xu, Yanmei; Stefik, Morgan; Benicewicz, Brian C.

Customer publications

Matrix-Free Polymer Nanocomposite Thermoplastic Elastomers

Huang, Yucheng; Zheng, Yang; Sarkar, Amrita; Xu, Yanmei; Stefik, Morgan; Benicewicz, Brian C.

Thermoplastic elastomer (TPE) grafted nanoparticles were prepared by grafting block copolymer poly(styrene-block-(n-butyl acrylate)) onto silica nanoparticles (NPs) via surface-initiated reversible addition–fragmentation chain transfer (RAFT) polymerization. The effects of polymer chain length and graft density on the mechanical properties were investigated using films made solely from the…