Synergetic effects of ligand exchange and reduction process enhancing both electrical and optical properties of Ag nanocrystals for multifunctional transparent electrodes

Abstract

We introduce a chemical process to fabricate nanocrystal based transparent electrodes with enhanced electronic and optical properties.

Investigation of the Chemical Effect of Solvent during Ligand Exchange on Nanocrystal Thin Films for Wearable Sensor Applications

“…As the applied strain does not affect electron paths due to sintered NCs, the film shows a low gauge factor (Figure c). In the case of R I film where a solvent with a lower polarity is used, a considerable number of Br components attach to the surface, enlarging the particle distance and interrupting the electron paths between Ag NCs. ,,− In this case, transport occurs by tunneling through enlarged interparticle distances. When strain is applied, the distance between NCs increases, making electron tunneling more difficult.…”

“…Colloidal nanocrystals (NCs) are promising materials as their properties can be precisely controllable depending on their size, − shape, ,, and composition. , Colloidal NCs can be synthesized on a large scale using various methods such as hot-injection, ,− wet chemical synthesis, − and ligand-assisted reprecipitation methods. , They can be easily coated onto various types of substrates via low-cost solution processes such as spin-coating, spray-coating, and inkjet printing, yielding large surface area and flexible NC thin films. Owing to their simple and large-scale fabrication as well as controllable properties, they have attracted a considerable amount of attention in various fields, such as the electronic, ,− optoelectronic, − photovoltaic , device, and biorelated sensor application − fields.…”

“…Most of the ligand exchanging processes are done with the solid-state ligand exchange method. ,− , This method, which is proceeded on the NC deposited film, can be divided into the two steps. The first step is the ligand exchanging step.…”

Thin Film Protected Flexible Nanoparticle Strain Sensors: Experiments and Modeling

“…In recent years, the development of flexible electronics has attracted a lot of interest due to its applications in robotics [1,2], wearable electronics [3][4][5][6], health-monitoring of large structures [7][8][9][10], and many other areas. Particularly in the field of flexible electronics, strain sensors are of great importance in emerging technologies such as the internet of things.…”

“…In addition, the low processing temperatures required in the case of NP-based strain sensing devices, render them fully compatible with flexible substrate technology [ 24 ]. NP strain sensors are finding new applications in new areas such as healthcare [ 1 , 4 ] and particularly in the development of electronic skin [ 4 , 15 , 25 , 26 , 27 ]. Their increased sensitivity to strain can be attributed to fundamental charge-transport mechanisms in NP assemblies.…”