CdSe Nanocrystal/C60-liquid composite material with enhanced photoelectrochemical performance

Abstract

The unique optoelectronic properties of a nanocomposite material comprised of cadmium selenide (CdSe) nanocrystals (NCs) embedded in a photoconductive liquid C 60 have been investigated. CdSe NCs are shown to sensitize the composite material to visible light, resulting in charge transfer from optically excited CdSe NCs to the solvent-free liquid C 60 phase.

A Spin‐Active, Electrochromic, Solvent‐Free Molecular Liquid Based on Double‐Decker Lutetium Phthalocyanine Bearing Long Branched Alkyl Chains

“…excellent processability, independent surface geometry, capillary action into confined space, deformability, and amorphousness) with various functions based on the core molecular component. In particular, FMLs comprising optoelectronically‐active π‐conjugated molecular units exhibit luminescence, photoconductivity, and nonlinear optics . The design strategy behind those FMLs is simple in principle: the functional core unit, such as a π‐conjugated molecule, including even large macrocycles such as porphyrin (Por) and phthalocyanine (Pc), is embedded by peripherally bulky and flexible alkyl or silyl side‐chain substituents.…”

“…The bulky alkyl chains can protect the functional core moiety from photodegradation . Further adjustment of the optoelectronic properties of alkylated π‐FMLs by doping of π‐conjugated molecular additives has also been achieved . The lack of necessity of polymer matrix or solvent can allow higher concentration/density of functional π‐units in the neat liquid, and may also help with the fabrication of thin films or highly defined elements in confined spaces.…”

PEGylated MoS2 Nanosheets: A Dual Functional Photocatalyst for Photodegradation of Organic Dyes and Photoreduction of Chromium from Aqueous Solution

“…Recently, various techniques have been applied for the elimination of heavy metals and organic dyes from polluted water which includes chemical oxidation [8], extraction [9], adsorption [10], photocatalytic activity [11], and biochemical method [12]. Amongst them, photocatalytic degradation and photocatalytic reduction of organic pollutants and heavy metals using nanostructured photocatalyst semiconductor materials have been considered to be the most promising and sustainable strategies for water decontamination and environment remediation [13][14][15]due to their simplicity of design, low cost, flexibility and eco-friendliness [16,17]. Photocatalytic degradation of organic pollutants is a process that combines catalysis with solar radiation [18,19] to degrade the dyes into harmless compounds (CO2 and H2O) and also to reduce Cr(VI) into harmless Cr(III).…”

Room Temperature Liquid Formulation by Attaching Alkyl Chains on ^|^pi;-Conjugated Molecules

“…20 As a practical example of liquid C 60 , a prototype photovoltaic cell (photoelectrochemical evaluation) has been demonstrated by preparing a liquid C 60 (8)/CdSe nanosrystals (NCs) composite on a transparent electrode (Figure 4). 21 In comparison to a pure CdSe NCs lm, the composite lm containing 25 wt% CdSe NCs in liquid 8 showed a 200% photocurrent enhancement under white light irradiation. Inspired by our molecular design strategy, a number of photoconductive, amorphous liquid materials, such as carbazole , 22 pyrene , 23 porphyrin , 24 and triarylamine 25 based room temperature liquids, have also been reported.…”

“…8,9 Through this method, blue emitting (electron donor type) liquids at room temperature derived from two molecules have been synthesized. One example is oligo(p phenylenevinylene) (OPV, 19, 20) 8 carrying four or six branched long alkyl chains and another one is a rather common luminescent dye; anthracene derivatives (21,22) 9 carrying four or eight branched long alkyl chains (Figure 6a c). All of these core isolated compounds (19 22) exhibit similar absorption and uorescence spectroscopy features in both diluted monomeric solution and neat liquid state (Figure 6d), demonstrating the total preservation of the molecularly intrinsic optical properties in the neat liquid state, which was expected in the molecular design.…”