Prospects of Coupled Organic–Inorganic Nanostructures for Charge and Energy Transfer Applications

Abstract

European Research Council (ERC) under the European Unions Horizon 2020 research and innovation program (grant agreement No 802822). J.L. acknowledges funding by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under Germanys Excellence Strategy within the Cluster of Excellence PhoenixD (EXC 2122, Project ID 390833453) and the Caroline Herschel program of the Leibniz Universität Hannover. F.L. thanks the FCI for a Liebig Fellowship. Financial support for A.F and A.M.S provided by Deutsche Forschungsgemeinschaft (DFG German Research Foundation), project ID 407193529 is gratefully acknowledged. Open access funding enabled and organized by Projekt DEAL.

Probing Excitons in Ultrathin PbS Nanoplatelets with Enhanced Near-Infrared Emission

“…For example, thin PbS NSs exhibit stable excitons with high binding energies (~70 meV for 4 nm thickness) and carrier multiplication (CM) efficiencies approaching 100 %, meaning that all photons with energy exceeding the CM threshold generate additional electron-hole pairs. [1][2][3] Charge carrier mobilities increase with the thickness of the PbS NSs and become as high as 1000 cm 2 /Vs for 16 nm thick NSs, which is close to the bulk mobility of PbS, while absorbing more light at longer wavelengths than thin NSs. Typically, PbS NSs with lateral dimensions of several µm and a thickness in the range of 4 -40 nm are obtained by synthesis methods based on oriented attachment mechanisms.…”

Plasmonic Charge Transfers in Large‐Scale Metallic and Colloidal Photonic Crystal Slabs

“…As a future goal, it thus becomes important for colloidal society to solve the bottleneck of non‐conductive polymer coating through the removal of the ligand shell or by replacing it with a conducting polymer that conducts at the exact wavelength of the plasmon resonance. [ 59 ] By using a conducting ligand, charge carrier transport can be enhanced. [ 60 ] The challenge is therefore to attach a ligand to the “coinage” metal nanoparticles in a way that favors the electronic exchange.…”

“…However, this can no longer be referred to as a classic Schottky barrier because of the involvement of two different mechanisms: first, a system with a classical Schottky barrier relating to the transfer of a hot charge carrier to an adjacent semiconductor; and second, the transfer of a hot charge carrier to an attached adsorbent (i.e., polymer ligand). While the mechanisms of the individual systems have been much discussed, [ 59 ] effects arising from the combination of the two systems are entirely unknown that needs to be thoroughly investigated. Another way to mitigate the problem of the insulating ligands on the Au nanoparticles is to coat the Au nanoparticles with a thin TiO 2 shell [ 61 ] before assembling them onto the TiO 2 layer through directive self‐assembly.…”

Trendbericht Physikalische Chemie: Zweidimensionale Halbleiter

“…[11][12][13] Starke Exziton-Bindungsenergien in ultradünnen Quasi-2-D-Halbleitern resultieren aus der verringerten Abschirmung von Elektron und Loch und einer erhöhten Coulomb-Wechselwirkung zwischen den Ladungsträgern (Abbildung 2). 11,14) Atomar dünne kolloidale 2-D-Halbleiter bieten Potenzial für die Optoelektronik und photonische Quantentechnologie.…”