翻訳と辞書 Words near each other ・ Photoconductivity ・ Photocopier ・ Photocopy (film) ・ Photocorynus spiniceps ・ Photocure ・ Photocurrent ・ Photocyte ・ Photodarkening ・ Photodegradation ・ Photodermatitis ・ Photodermatology, Photoimmunology and Photomedicine ・ Photodermatosis ・ Photodetection ・ Photodetector ・ Photodex ・ Photodiode ・ PhotoDisc ・ Photodisintegration ・ Photodisintegration hypernovae ・ Photodisruption ・ Photodissociation ・ Photodissociation region ・ PhotoDNA ・ Photodotis ・ Photodotis abachausi ・ Photodotis adornata ・ Photodotis palens ・ Photodotis pellochroa ・ Photodotis photinopa ・ Photodotis prochalina Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Photodiode ： ウィキペディア英語版 Photodiode A photodiode is a semiconductor device that converts light into current. The current is generated when photons are absorbed in the photodiode. A small amount of current is also produced when no light is present. Photodiodes may contain optical filters, built-in lenses, and may have large or small surface areas. Photodiodes usually have a slower response time as their surface area increases. The common, traditional solar cell used to generate electric solar power is a large area photodiode. Photodiodes are similar to regular semiconductor diodes except that they may be either exposed (to detect vacuum UV or X-rays) or packaged with a window or optical fiber connection to allow light to reach the sensitive part of the device. Many diodes designed for use specifically as a photodiode use a PIN junction rather than a p–n junction, to increase the speed of response. A photodiode is designed to operate in reverse bias. ==Principle of operation== A photodiode is a p–n junction or PIN structure. When a photon of sufficient energy strikes the diode, it creates an electron-hole pair. This mechanism is also known as the inner photoelectric effect. If the absorption occurs in the junction's depletion region, or one diffusion length away from it, these carriers are swept from the junction by the built-in electric field of the depletion region. Thus holes move toward the anode, and electrons toward the cathode, and a photocurrent is produced. The total current through the photodiode is the sum of the dark current (current that is generated in the absence of light) and the photocurrent, so the dark current must be minimized to maximize the sensitivity of the device.〔Filip Tavernier, Michiel Steyaert ''High-Speed Optical Receivers with Integrated Photodiode in Nanoscale CMOS'' Springer, 2011 ISBN 1-4419-9924-8, Chapter 3 ''From Light to Electric Current - The Photodiode''〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Photodiode」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.