Surface Modification for Improving the Photocatalytic Polymerization of 3,4-Ethylenedioxythiophene over Inorganic Lead Halide Perovskite Quantum Dots

Abstract

Inorganic lead halide perovskite quantum dots (iLHP-QDs) have recently been used in the photocatalytic reaction. However, the factors that influence the photocatalytic performance of the iLHP-QDs have not been fully investigated. Herein, we synthesized a series of iLHP-QDs with varied halide ratios (CsPbX3, X = I, I0.67Br0.33, I0.5Br0.5, I0.33Br0.67, Br) and studied their influence on the photocatalytic performance by monitoring the polymerization of 2,2′,5′,2″-ter-3,4-ethylenedioxythiophene (TerEDOT). The CsPbI3 QDs showed the best performance owing to their narrow band gap and low exciton binding energy. Moreover, the photocatalytic performance of the iLHP-QDs could be simply improved by being treated with methyl acetate, which can be attributed to the replacement of the oleic acid by the short acetate acid and the introduction of the traps on the surface of QDs in the post-treatment. These results could help design a more efficient photocatalytic system and further promote the application of iLHP-QDs.

Recent Progress in Engineering Metal Halide Perovskites for Efficient Visible‐Light‐Driven Photocatalysis

“…In a follow‐up study reported by Chen et al., they found that the performance of CsPbBr 3− x I x was enhanced upon increasing the iodine content (Figure c). Due to the narrow band gap and low exciton binding energy, CsPbI 3 QDs showed the best performance to accelerate the polymerization of TerEDOT.…”

Thiophene-Based Trimers and Their Bioapplications: An Overview

“…In here, an EDOT halide initially reacts with Mg to form the Grignard reagent. Afterwards, dibromo- or diiodoEDOT is added and a Ni(II) catalyst promotes the coupling to give terEDOT [ 54 , 55 , 56 , 57 , 58 , 59 ]. Kumada reaction was also applied to the synthesis of other unsubstituted EDOT-based trimers, such as thiophene-EDOT-thiophene [ 60 , 61 ] or EDOT-Thiophene-EDOT [ 62 , 63 ].…”

Surface modification for improving the photoredox activity of CsPbBr3nanocrystals

“…Nevertheless, direct modification of PNCs may be the most viable and straightforward option to accelerate the charge transport which therefore improves the photocatalytic performance efficiency. 41 To designing an efficient photo-catalyst the competition between radiative charge recombination and charge transfer remains the main focus. In the metal chalcogenides semiconductor nanocrystals, efficient charge separation was achieved through morphological and band engineering modifications via core/shell heterostructures.…”