Cover Picture: High quantum efficiency UV detection using a‐Se based photodetector (Phys. Status Solidi RRL 7/2013). Issue 7 (15th July 2013)

• Record Type: Journal Article
• Authors: Masuzawa, Tomoaki; Onishi, Masanori; Saito, Ichitaro; Yamada, Takatoshi; Koh, Angel T. T.; Chua, Daniel H. C.; Ogawa, Shuichi; Takakuwa, Yuji; Mori, Yusuke; Shimosawa, Tatsuo; Okano, Ken
• Is Part Of: Physica status solidi. Volume 7:Issue 7(2013:Jul.)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2013-07-15
• Subjects: Solid state physics -- Periodicals; 530.4105
• DOI: 10.1002/pssr.201370438
• Languages: English
• ISSNs: 1862-6254

Abstract

<abstract abstract-type="graphical" xml:lang="en"> <title> <x xml:space="preserve">Abstract</x> </title> <p> <italic>Multiplication in the bulk:</italic> Photo‐generated elec‐tron–hole pairs are split and accelerated in amorphous selenium bulk, which trigger carrier multiplication generating extra carriers. This carrier multiplication boosts the signal of a photodetector, allowing ultra high‐sensitivity photodetection. The sensitivity of a prototype photodetector, evaluated in terms of external quantum efficiency, is up to 1, 000 for ultraviolet light (∼375 nm), which suggests that up to 1, 000 carriers are generated per incident photon. In the Letter by Masuzawa et al. (<ext-link ext-link-type="doi" xlink:type="simple" xmlns:xlink="http://www.w3.org/1999/xlink">see pp. 473–476</ext-link>), the physics of the carrier multiplication has been investigated in terms of current–voltage characteristics of the prototype photodetector.</p> <p> <boxed-text content-type="graphic" position="anchor" orientation="portrait"> <graphic position="anchor" mimetype="image" xlink:href="ark:/27927/pgg271q94rq" orientation="portrait" xlink:type="simple" xmlns:xlink="http://www.w3.org/1999/xlink" /> </boxed-text> </p> </abstract>