Enhanced photoelectrochemical performance of quantum dot-sensitized solar cell using Cu 2+ co-doped CdS and CdSe nanoscrystals.
Thi Tran Anh TuanHa Thanh TungTruong Thi Ngoc ChinhPhan Thanh HungHuu Phuc DangPublished in: Royal Society open science (2024)
Today, nanoscrystals are researched and developed very quickly because of their advantages in many areas of life. One of the potential applications is quantum dot-sensitized solar cells. This is a green, clean, environmentally friendly cell, and has been studied by scientists since 2000. In this study, we fabricated photoanodes with Cu 2+ ions co-doped into cadmium sulfide (CdS) and cadmium selenide (CdSe) nanoscrystals by successive ionic layer adsorption and reaction, and chemical bath deposition methods to improve absorption spectral intensity of films. The results showed that the absorption intensity increased by eight times compared with our previous results on Cu 2+ ions doped with CdSe nanoscrystals. The CdS:Cu 2+ film is optimized at 2% doping, the efficiency is 4.6819%, and the current density is 27.3501 mA.cm -2 , which is higher when compared with the Cu 2+ ion only doped into the CdSe quantum dot (19.915 mA.cm -2 ). In addition, the composition of the photoanode was determined by surface and cross-sectional field-emission scanning electron microscope images, and the structure of the film was determined by X-ray diffraction, energy-dispersive X-ray spectroscopy mapping and X-ray photoelectron spectroscopy. Finally, the film's optical properties were studied by ultraviolet-visible spectroscopy, photoluminescence spectroscopy and electrochemical properties by electrochemical impedance spectroscopy. The results obtained have been discussed and presented in great detail.
Keyphrases
- quantum dots
- high resolution
- aqueous solution
- sensitive detection
- solid state
- single molecule
- electron microscopy
- ionic liquid
- room temperature
- dual energy
- solar cells
- cross sectional
- mass spectrometry
- metal organic framework
- single cell
- gold nanoparticles
- energy transfer
- cell therapy
- reduced graphene oxide
- optical coherence tomography
- heavy metals
- machine learning
- climate change
- convolutional neural network
- magnetic resonance
- tandem mass spectrometry
- computed tomography
- human health
- water soluble
- visible light