Electrogenerated Chemiluminescence and Spectroelectrochemistry Characteristics of Blue Photoluminescence Perovskite Quantum Dots

Abstract

Lead-based perovskite MAPbX3 (MA = CH3NH3, X = Cl and Br) has shown great potential benefits to advance modern optoelectronics and clean energy harvesting devices. Poor structural stability is one of the major challenges of MAPbX3 perovskite materials to overcome to achieve desired device performance. Here, we present the electrochemical stability study of CH3NH3PbCl1.08Br1.92 quantum dots (QDs) by electrogenerated chemiluminescence (ECL) and photoluminescence (PL) spectroelectrochemistry methods. Electrochemical anodization of pristine MAPbX3 QD film results in the disproportionate loss of methylammonium and halide ions (X = Cl and Br). ECL efficiency and stability of perovskite QDs in the presence of coreactant tripropyl amine (TPrA) can be greatly improved after being incorporated into a polystyrene (PS) matrix. Mass spectrum and X-ray photoelectron spectroscopy (XPS) measurements were used to provide chemical composition variation details of QDs, which are responsible for the ECL and PL characteristics (e.g., wavelength redshift) of perovskite QDs in an electrochemical cell.

Ultrathin alkynylation phthalocyanine-conjugated organic polymer nanosheets for constructing a sensitive electrochemiluminescence sensor

“…22 Similarly, multiple materials exhibit potential ECL because of their surface hole-electron annihilation luminescence. Recently, inorganic perovskite QDs, [23][24][25] upconversion nanoparticles, 26,27 aggregation-induced emission materials, 28 electroactive metal organic frameworks (E-MOFs), 29,30 and covalent organic frameworks (COFs) [31][32][33] have been reported as new ECLactive materials. Nevertheless, there are few studies focused on ECL-sensitive COPs.…”

Influence of fumed silica and PMMA on optical properties of blue-emitting CH3NH3PbBr3 perovskite nanocrystals

“…al. [13] has used a mixture of X-site Cl and Br to synthesize blue perovskite film with an absorption spectrum band edge of 460 nm and peak photoluminescence spectrum of 480 nm. However, the photoluminescence and electrogenerated chemiluminescence stability were only increased after the addition of tripropylamine (TrPA) and polystyrene matrix as reactants.…”

“…However, the photoluminescence and electrogenerated chemiluminescence stability were only increased after the addition of tripropylamine (TrPA) and polystyrene matrix as reactants. Additionally, multiple-type X-site components enable phase segregation, resulting in photoluminescence instability [13]. Jayakrishnan et.…”

Ternary Electrochemiluminescence Biosensor Based on DNA Walkers and AuPd Nanomaterials as a Coreaction Accelerator for the Detection of miRNA-141

“…Relying on the advantages above, numerous reactants with excellent performance have been explored gradually to increase the luminescence quantum efficiency in unit time. N -(4-Aminobutyl)- N -(ethylisoluminol) (ABEI) has been confirmed to be a novel derivative of luminol, which is more reactive than the prototype and is easier to react with coreactants, leading to stronger ECL. − To further amplify a signal, a coreaction accelerator was introduced into a luminophore/coreactant system, which could catalyze the coreactant to increase the formation of free radical intermediates for acquiring a higher excited state of the luminophore . As a result of the synergistic effect between the alloying atoms and high refracture index surface, AuPd NPs with extraordinary catalytic performance were selected to construct an ECL ternary system. − …”