See also: [[Amorphous Selenium]] # Thin-Film Transistor (TFT) Arrays Motivation: Considering Comments from [[2023 Student Conference Presentation Update Considerations]] ![](https://www.researchgate.net/publication/6924510/figure/fig4/AS:298021163159560@1448065190708/The-TFT-active-matrix-array-is-composed-of-millions-of-individual-detector-elements-each.png) The TFT is a photosensitive array made up of small (about 100 to 200 micron) pixels, also called a detector element (del). Each pixel contains a photodiode that absorbs the electrons and generates electric charges. This technology that is used in a subset of radiation detectors that uses direct conversion, wherein the x-rays are absorbed by the coating material and is immediately converted to electric signal.