High-Performance and Stable Perovskite Solar Cells Using Carbon Quantum Dots and Upconversion Nanoparticles

Abstract

Upconversion nanoparticles (UCNPs) and carbon quantum dots (CQDs) have recently received a lot of attention as promising materials to improve the stability and efficiency of perovskite solar cells (PSCs). This is because they can passivate the surfaces of perovskite-sensitive materials and act as a spectrum converter for sunlight. In this study, we mixed and added both promising nanomaterials to PSC layers at the ideal mixing ratios. When compared to the pristine PSCs, the fabricated PSCs showed improved power conversion efficiency (PCE), from 16.57% to 20.44%, a higher photocurrent, and a superior fill factor (FF), which increased from 70% to 75%. Furthermore, the incorporation of CQDs into the manufactured PSCs shielded the perovskite layer from water contact, producing a device that was more stable than the original.

Carbon Dots: Synthesis, Characterizations, and Recent Advancements in Biomedical, Optoelectronics, Sensing, and Catalysis Applications

“…The manufactured PSCs demonstrated stronger photocurrent, better fill factor (FF), and enhanced power conversion efficiency (PCE) from 16.57% to 20.44% as compared to the pristine PSCs. In addition, the added CQDs protected the perovskite layer from contact with water in the produced PSCs, making the device more stable than before . To create ethylene-vinyl acetate (EVA) sheets customized with ultrahigh fluorescent carbon quantum dots (CQDs), Xiaohui Wang et al devise a simple solution-casting method.…”

“…(C) The n–i–p PSC schematic design and the ligand-capped CND visual representation are shown. Reproduced with permission from ref . Copyright 2022 MDPI AG (Multidisciplinary Digital Publishing Institute).…”

“…In addition, the added CQDs protected the perovskite layer from contact with water in the produced PSCs, making the device more stable than before. 191 Because of the carboxylic groups on their surface, CP-DOTs have emission characteristics that are dependent on stimulation. Additionally, the photovoltaic characteristics of organic solar cells (OSCs) were enhanced by the addition of CP-DOTs.…”

Investigation of Perovskite Solar Cells Using Guanidinium Doped MAPbI3 Active Layer

“…However, because the performance and stability of the perovskite are easily deteriorated due to the penetration of water and oxygen molecules, it poses challenges for commercialization [ 17 ]. Hence, achieving high PCE and stability in PSCs remains a critical global research topic [ 18 , 19 ]. Since doping technology in perovskite has been discovered, it represents a wonderful promising solution to enhance the performance and stability of PSCs [ 20 , 21 ].…”