P3HT-rGO composites for High-Performance Optoelectronic Devices

Improved NO2 Gas-Sensing Performance of an Organic Field-Effect Transistor Based on Reduced Graphene Oxide-Incorporated Nanoporous Conjugated Polymer Thin Films

“…In a typical process to fabricate nanoporous P3HT/rGO composite thin films, P3HT, and PS/rGO were first added to chloroform (CF) to prepare P3HT/CF and PS/rGO/CF solutions, respectively, and then the as-prepared solutions were mixed. The addition of rGO to the P3HT/PS composite solution can induce the formation of P3HT aggregates, as the P3HT chains can be doped by rGO as electron transfer from P3HT to rGO occurs. , This fact can be confirmed by the UV–vis analysis of the P3HT solution when exposed to an oxygen environment, as shown in Figure S1. The UV–vis spectrum shows the generation and development of lower energy bands (∼565 and 615 nm) that correspond to P3HT aggregates because of oxidation (doping) of the solution over increasing exposure time of the P3HT solution to synthetic dry air.…”

“…As the concentration of rGO increased from 0 to 15 wt %, the charge transport mobility (μ) increased from 0.002 to 0.083 cm 2 /Vs for the P3HT/PS/rGO OFETs and from 0.001 to 0.044 cm 2 /Vs for the nanoporous P3HT/rGO OFETs, and the corresponding on-current ( I ON ) values also increased through the transfer curves of the OFETs (Figure S7). This increase is ascribed to the improved molecular ordering and doping of P3HT by rGO (Figure a–c). , However, a further increase in the rGO concentration up to 23 wt % led to a decrease in charge mobility, attributed to the inhomogeneity of the composite film morphologies caused by the addition of rGO at a high concentration. ,, Importantly, OFETs based on nanoporous P3HT/rGO composites showed lower I ON and μ values compared to OFETs based on P3HT/PS/rGO composites, which is a result of the formation of many pores acting as charge trapping sites. , In addition, a strong positive shift and an increase in off-current ( I OFF ) were also observed as the rGO content increased, indicating that rGO acts as a strong electron acceptor (i.e., p-type dopant) for P3HT. , Upon exposure of OFETs to synthetic air or NO 2 gas, the transfer curves of all OFETs changed significantly (Figure b,c). When all OFETs were exposed to NO 2 gas after exposure to synthetic air, the transfer curve shifted in the positive direction and the I ON values increased.…”

Hybrid of Conjugated Polymers with Incorporation of Metal Oxide Nanocomposites for Improving Optoelectronic Properties

“…Several studies proved that the usage of such nanocomposites is potential and suitable for future development of the optoelectronic or electrical devices. [ 1–6 ]…”

“…Several studies proved that the usage of such nanocomposites is potential and suitable for future development of the optoelectronic or electrical devices. [1][2][3][4][5][6] Interest in conjugated polymers-based white-light organic light-emitting diodes (OLED) devices has gained great attention for potential applications in solid-state lighting due to the features of low manufacturing cost, flexibility, light weight, and roll-to-roll production. [7][8][9][10] Following with new material compositions and unique design of the device structure, the performance of optoelectronic devices has improved and further development in these devices is still desired for the future applications.…”

Ppy-decorated graphene oxide: Synthesis and analysis of surface, structural and optical properties

“…Polymer nanocomposites are hybrid materials composed of a polymer matrix and nanoscale fillers, which can enhance the properties and functionality of the polymer matrix [1][2][3][4]. It is widely investigated that the surface decoration of these fillers using a variety of materials is a promising strategy to further improve the properties and performance of polymer nanocomposites [5][6][7][8].…”