Colloidal Nanoplatelet/Conducting Polymer Hybrids: Excitonic And Material Properties

6533b82cfe1ef96bd128ff16

RESEARCH PRODUCT

Colloidal Nanoplatelet/Conducting Polymer Hybrids: Excitonic And Material Properties

Yusuf Kelestemur Hilmi Volkan Demir Hilmi Volkan Demir Kai Philipps Rudolf Zentel Murat Olutas Murat Olutas Burak Guzelturk Florian Menk

subject

Excitation spectrum Materials science Photoluminescence Sulfide DEH-PPV-Based Polymers Sulfide Exciton CdSe Nanoplatelets Nanotechnology 02 engineering and technology Surface active agents 010402 general chemistry Optoelectronic devices 01 natural sciences Dissociation (chemistry)Colloid Charge transfer Quenching Hybrid optoelectronic devices Physical and Theoretical Chemistry Photoluminescence Sulfur compounds Amine Semiconductor nanocrystals Conductive polymer chemistry.chemical_classification Excited states Building blockes Polymer Interface states Emission quenching 021001 nanoscience & nanotechnology 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Polymer/Colloidal Nanoplatelet Hybrids General Energy Chemical engineering chemistry Excited state Anchors Excitons 0210 nano-technology Dissociation Conductive polymer Photoluminescence quenching Exciton dissociation

description

WOS:000370678700053 Here we present the first account of conductive polymer/colloidal nanoplatelet hybrids. For this, we developed DEH-PPV-based polymers with two different anchor groups (sulfide and amine) acting as surfactants for CdSe nanoplatelets, which are atomically flat semiconductor nanocrystals. Hybridization of the polymers with the nanoplatelets in the solution phase was observed to cause strong photoluminescence quenching in both materials. Through steady-state photoluminescence and excitation spectrum measurements, photoluminescence quenching was shown to result from dominant exciton dissociation through charge transfer at the polymer/nanoplatelet interfaces that possess a staggered (i.e., type II) band alignment. Importantly, we found out that sulfide-based anchors enable a stronger emission quenching than amine-based ones, suggesting that the sulfide anchors exhibit more efficient binding to the nanoplatelet surfaces. Also, shorter surfactants were found to be more effective for exciton dissociation as compared to the longer ones. In addition, we show that nanoplatelets are homogeneously distributed in the hybrid films owing to the functional polymers. These nanocomposites can be used as building blocks for hybrid optoelectronic devices, such as solar cells.

year	journal	country	edition	language
2016-02-04

https://aperta.ulakbim.gov.tr/record/59655