Xuegang Zhang, Ge Mu, Yongzhe Zhang, Yijian Jiang and Yinzhou Yan
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Heavy metal-free colloidal quantum dots: preparation and application in infrared photodetectors
The development of infrared photodetectors is increasingly moving towards the realization of large-scale, cost-effective integrated systems. Currently, silicon (Si), indium gallium arsenide (InGaAs), and mercury cadmium telluride (HgCdTe) dominate infrared photodetectors, but due to the ever-increasing performance requirements and the complexity of emerging application scenarios, a new generation of detector technologies is imperative. Colloidal quantum dots (CQDs), which are compatible with existing silicon-based microelectronics, with low manufacturing costs and simplified processing, are ideal alternatives. Hg- or Pb-based infrared photodetectors have been widely studied owing to their excellent performance. Nevertheless, the presence of heavy metal elements greatly limits the application scenarios of the detectors. Therefore, heavy metal-free (HMF) CQD-based infrared photodetectors solve the above problem from the source. In this work, the latest advancements in the synthesis of HMF CQDs and a brief overview of the development of HMF CQD-based infrared photodetectors are given. Within the context of this field, we summarize the possible forward-looking directions and obstacles.
期刊介绍:
The Journal of Materials Chemistry is divided into three distinct sections, A, B, and C, each catering to specific applications of the materials under study:
Journal of Materials Chemistry A focuses primarily on materials intended for applications in energy and sustainability.
Journal of Materials Chemistry B specializes in materials designed for applications in biology and medicine.
Journal of Materials Chemistry C is dedicated to materials suitable for applications in optical, magnetic, and electronic devices.
Example topic areas within the scope of Journal of Materials Chemistry C are listed below. This list is neither exhaustive nor exclusive.
Bioelectronics
Conductors
Detectors
Dielectrics
Displays
Ferroelectrics
Lasers
LEDs
Lighting
Liquid crystals
Memory
Metamaterials
Multiferroics
Photonics
Photovoltaics
Semiconductors
Sensors
Single molecule conductors
Spintronics
Superconductors
Thermoelectrics
Topological insulators
Transistors