Recent developments in Metal Chalcogenides based Quantum Dot Sensitized Solar Cells

Abstract

Recent advance in nanotechnology leads to develop a variety of metal chalcogenide quantum dots (QDs) such as binary metal chalcogenides QDs and alloyed QDs. The average diameter of the QDs lies in the range of 2 to 10 nm which contains almost 10 to 1000 atoms. Due to the quantum confinement effect, size-dependent photoemission characteristics, photo-optical and photovoltaic properties, QDs have a wide variety of applications. It has attracted more attention in light-emitting diodes, medicines, quantum computers and energy devices. As an important part of quantum dot sensitized solar cells (QDSCs), QDs play an eminent role to improve photoconversion efficiency (PCE). This review article mainly focuses on the influence of metal chalcogenides QDs on the photovoltaic performance of liquid junction QDSCs, including parts and working principle of QDSC, photovoltaic parameters of QDSC, types of metal chalcogenide QDs, synthesis methods of metal chalcogenide QDs, optoelectronic properties of metal chalcogenide QDs, efficient deposition method of metal chalcogenide QDs sensitizer and its photovoltaic performance. We finally made conclusions and suggestions for future research to improve the PCE. This article will give more information about the variety of QDs and it is helpful to the researchers for making efficient QDSCs.

Progress of layered double hydroxide-based materials for supercapacitors

“…Green renewable energy, mainly including solar energy, 3 tidal energy, 4 wind energy, 5,6 hydrogen energy, 7,8 etc., has the advantages of being sustainable, renewable 9 and easy to obtain. It has shown broad prospects in replacing one-time energy and has been developed rapidly.…”

“…2 Therefore, scientists have devoted themselves to the field of new energy, which is also a research hotspot today. Green renewable energy, mainly including solar energy, 3 tidal energy, 4 wind energy, 5,6 hydrogen energy, 7,8 etc. , has the advantages of being sustainable, renewable 9 and easy to obtain.…”

Taurine as a powerful passivator of perovskite layer for efficient and stable perovskite solar cells

“…2 These great achievements can be attributed to the excellent light absorbing property, relatively low excitation energy, long carrier lifetime, and active carrier mobility of halide perovskite materials. 3–7…”

“…2 These great achievements can be attributed to the excellent light absorbing property, relatively low excitation energy, long carrier lifetime, and active carrier mobility of halide perovskite materials. [3][4][5][6][7] However, the ionic lattice characteristics and relatively low formation energy of halide perovskite materials give rise to various intrinsic defects, such as vacancies and low coordination Pb 2+ and I − ions, during lm formation and device operation. [8][9][10] These defects in the perovskite lattice can act as carrier nonradiative recombination sites and seriously lower the open-circuit voltage (V OC ) and ll factor (FF) of the devices.…”

In situ coupled nickel-based layered double hydroxides with MXene to enhance supercapacitor performance

“…[4][5][6] It is imperative to search, explore and research new renewable clean energy to replace non-renewable resources. [7][8][9][10] Unfortunately, renewable energy requires further research and exploration of its conversion and storage methods because of its spatial and temporal discontinuities. [11][12][13][14] Fuel cells, lithium-ion batteries and supercapacitors are devices with relatively superior energy storage, and have stimulated the interest of researchers.…”