Effect of carbon quantum dots and Zn2+ ion on perovskite solar cells

Abstract

Perovskite solar cells (PSCs) have a great attention due to their remarkable performance and a high-quality perovskite film is necessary to achieve high power conversion efficiency (PCE). The effect of carbon quantum dots (CQDs) and Zn2+ ions on perovskite layer of methyl ammonium lead iodide (MAPbI3) was investigated. The optical, structural, and morphological properties of perovskite films with different Zn2+ ratios and CQDs contents were investigated. It was observed that 1% ZnCl2 /0.05 mg/mL CQDs perovskite film composed of uniform grains distribution, complete surface coverage with negligible pinholes, and a larger grain size of 1.8 μm. In addition, it was found that increasing CQDs contents to 0.1 and 0.25 mg/mL enlarged the grain size to ~ 4.2 μm. Moreover, the incorporation of CQDs enhanced crystallinity and grain size. Consequently, these improvements were reflected on the solar cell performance and the efficiency of PSCs with additive of 1% ZnCl2-0.05 mg/mL CQDs was improved from 4.21 to 8.08%.

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

“…Because of their exceptional qualities, perovskites have been thoroughly studied as absorber layers in solar technology. 189 Çisem Kırbıyık Kurukavak et al successfully synthesized phosphorus doped carbon dots (P-CQDs) by solvothermal method and investigated their effect as an additive on the perovskite film properties and photovoltaic performance here, with the goal of further enhancing the power conversion efficiencies (PCEs) of MAPbI 3 perovskite solar cells. The outcomes show that phosphorus rich in electrons may function as a great core unit in the perovskite absorber layer to passivate surface imperfections for better crystallization and charge transport characteristics.…”

“…The efficiency of PSCs increased from 4.21 to 8.08% when 1% ZnCl 2 -0.05 mg/mL CQDs were added. Because of their exceptional qualities, perovskites have been thoroughly studied as absorber layers in solar technology . Çisem Kırbıyık Kurukavak et al successfully synthesized phosphorus doped carbon dots (P-CQDs) by solvothermal method and investigated their effect as an additive on the perovskite film properties and photovoltaic performance here, with the goal of further enhancing the power conversion efficiencies (PCEs) of MAPbI 3 perovskite solar cells.…”