China
Africa
Explore chapters and articles related to this topic
CNT Structure and Its Application in Display Technology
Published in Ann Rose Abraham, Soney C. George, A. K. Haghi, Carbon Nanotubes, 2023
V. N. Archana, N. G. Divya, V. N. Anjana, Reyha Benedict
According to the percolation theory, the aspect ratio of a conductive material reduces the critical density that is required to form a conductive network. Thus, the 1D nanomaterials such as CNTs can achieve higher conductivity using less material than the materials with other morphology, which is due to their lower percolation threshold and higher aspect ratio. Because of these features, an added benefit of high transparency can be achieved due to the formation of voids in the conducting networks at a submonolayer level. Thus, the conducting network of CNTs intrinsically has good mechanical robustness that can provide both conductivity and transparency for flexible display applications. Several researchers have focused on the mechanical properties of CNTs and tried to use CNTs for electronic display devices. To make such flexible displays, various fabrication methods have been adopted such as spray coating, CVD, etc..50,51
Green Electronics for Future Communication Systems
Published in Gurjit Kaur, Akanksha Srivastava, Green Communication Technologies for Future Networks, 2023
Sakshi Mittal, Gurjit Kaur, Manjeet Kumar
Mobile phones are battery operated. Hence their capacity is limited as the dimension of the device will increase with an increase in battery size. The requirement of the present generation is a device with all computer related processing in their pocket (Aaron et al., 2010). The evolution of mobile phone began with the first generation cell phone in 1980 and continues with deployment of 5G smart phones in 2019. These days’ mobile phones are used for data processing, creating and sharing multimedia files, running different applications in addition to its basic feature of making a call. But running these applications in the background consumes a lot of power. Hence the device needs to be efficient in terms of energy saving. As per Mohammad et al. (2016), offloading is one of the main energy conserving techniques in mobile computing. Offloading means to transfer the execution of offloaded task from a mobile device to a computational infrastructure for example cloud. Cell phones in the late 80s used to be heavy and bulky. The discarding of these devices was a major issue. Burning of these devices releases harmful chemicals into the environment. This problem was solved with the invention of flexible displays for use in smart phones. These flexible displays are generally made up of OLED, which makes them environment friendly. Hence they also can be proved to be greener.
Transparent Electrode for OLEDs
Published in Zhigang Rick Li, Organic Light-Emitting Materials and Devices, 2017
Next-generation flexible displays are commercially competitive because of their low power consumption, high contrast, light weight, and flexibility. The use of thin flexible substrates in OLEDs will significantly reduce the weight of flat-panel displays and provide the ability to bend or roll a display into any desired shape. Much effort has been focused on fabricating OLEDs on various flexible substrates [67–71]. However, the polymeric flexible substrates, such as polyester and polyethylene terephthalate (PET), are not compatible with high-temperature plasma processes. Usually, a processing temperature of >200°C is required for preparing ITO films with a low electrical resistivity and high optical transparency in the visible wavelength region. ITO films formed at a processing temperature <200°C often have relatively higher resistivity and lower optical transparency than the films prepared at a high substrate temperature. In the application of organic electronics, however, it is often required to coat a layer of TCO on the plastic substrates or the active organic electroluminescent materials that are not compatible with a high processing temperature. The emergence of flexible OLEDs creates a need for the development of lowtemperature-processing, high-performance ITO film on plastic or other flexible substrates. Therefore, the development of ITO with high optical transparency and electric conductivity at a low processing temperature is of practical importance.
Electronic and optoelectronic applications of solution-processed two-dimensional materials
Published in Science and Technology of Advanced Materials, 2019
Plenty of applications such as epidermal electronics and wearable electronics need large-area flexible displays. Currently, Si has been largely used in the field of semiconductor devices. Though researchers have found that Si wafers can become flexible when it is thinned down below 25 μm [92,93], the brittle nature largely limits it further application especially in some devices which requires long lifetime and good reliability. Also, there is another type of important flexible electronics materials, the flexible organic semiconductors. However, the relatively poor performance and stability of organic flexible devices increases the resistance of the devices, thus causing higher energy consumption.
Progress of display performances: AR, VR, QLED, OLED, and TFT
Published in Journal of Information Display, 2019
Ho Jin Jang, Jun Yeob Lee, Jeonghun Kwak, Dukho Lee, Jae-Hyeung Park, Byoungho Lee, Yong Young Noh
Flexible displays are considered the next-generation displays due to their high form freedom. The backplane TFTs of the true form freedom display should be made of flexible semiconducting materials. In this sense, organic semiconductors are referred to as candidate materials due to their high mechanical flexibility (Figure 1). Although rapid progress has been made of late, however, in the development of such materials, the mobility of the materials must be further improved for driving the OLED display. The representative TFT results of various materials are summarized in Table 9.
Recent progress in the development of backplane thin film transistors for information displays
Published in Journal of Information Display, 2021
Dongseob Ji, Jisu Jang, Joon Hui Park, Dasol Kim, You Seung Rim, Do Kyung Hwang, Yong-Young Noh
Flexible displays have high form freedom and are therefore considered to constitute the next generation of displays. The backplane TFTs of a display that has true form freedom should include flexible semiconducting materials. Therefore, organic semiconductors, TMDCs, and CNT are promising candidate materials due to their high mechanical flexibility (Figure 1).