Photovoltaic Conversion Enhancement of a Carbon Quantum Dots/p-Type CuAlO₂/n-Type ZnO Photoelectric Device

Abstract

Carbon quantum dots (C QDs)/p-type CuAlO2/n-type ZnO photoelectric bilayer film composites were prepared by a simple route, through which ZnO films were sputtered on crystal quartz substrates and CuAlO2 films were prepared by sol-gel on ZnO films and then these bilayer films were composited with C QDs on their surface. The characterization results indicated that C QDs were well combined with the surface of the CuAlO2 films. The photovoltage and photocurrent of these bilayer film composites were investigated under illumination and darkness switching, which demonstrated to be significantly enhanced compared with those of the CuAlO2/ZnO bilayer films. Through analysis, this enhancement of the photoconductivity was mainly attributed to C QDs with unique up-converted photoluminescence behavior.

Carbon Quantum Dot Surface-Engineered VO2Interwoven Nanowires: A Flexible Cathode Material for Lithium and Sodium Ion Batteries

“…The CQD solution was prepared according to a previous work. 45 In a typical synthesis, 3.42 g of sucrose was dissolved in 100 mL of water and then transferred to a 100 mL Teflon-lined autoclave. The autoclave was heated at 160 °C for 3 h and then cooled to room temperature.…”

Enhancing Electron and Hole Extractions for Efficient PbS Quantum Dot Solar Cells

“…CQDs and PbS QDs Synthesis : The CQDs were fabricated through the hydrothermal method . Typically, 0.375 g sucrose was dissolved in 150 mL deionized water and stirred for at least 30 min.…”

“…CQDs and PbS QDs Synthesis: The CQDs were fabricated through the hydrothermal method. [53] Typically, 0.375 g sucrose was dissolved in 150 mL deionized water and stirred for at least 30 min. Then the solution was transferred into the Teflon-lined stainless steel autoclave and was heated at 180 C for 5 h. After a 12-h natural cooling down process, the solution was centrifuged to separate from the deposit.…”

In vivo characterization of hair and skin derived carbon quantum dots with high quantum yield as long-term bioprobes in zebrafish

“…Hence, they have multiple applications in the research fields of photocatalytic energy conversion2, catalysis3, fluorescence labeling of cells4, food detection5, photovoltaic conversion6, and multifunctional sensor7. Compared to organic dyes and semiconductor QDs, CDs are biocompatibility and noninvasive for cells and other living organisms at much higher concentration levels, with the primary elements of carbon, oxygen, hydrogen, and nitrogen.…”