A polymer/fullerene based photodetector with extremely low dark current for x-ray medical imaging applications

T. Agostinelli, M. Campoy-Quiles, J. C. Blakesley, R. Speller, D. D.C. Bradley, J. Nelson

Research output: Contribution to journalArticlepeer-review

86 Scopus citations

Abstract

Organic photodetectors for use in medical x-ray digital imaging applications are fabricated from poly(3-hexylthiophene) and [6,6]-phenyl C 61-butyric acid methyl ester using a solution-based, temperature assisted deposition protocol. In comparison to bulk heterojunction structures, the proposed protocol leads to much lower dark currents while still offering useful external quantum efficiency values. Devices made by this protocol lead to dark currents of around 50 pA cm2 at -0.8 V, well within the requirements for x-ray digital imaging. When coupled to a scintillating phosphor screen the device yields a linear response of photocurrent to x-ray exposure (from 0 to 7mGys) for a range of operating biases. © 2008 American Institute of Physics.
Original languageEnglish (US)
JournalApplied Physics Letters
Volume93
Issue number20
DOIs
StatePublished - Dec 2 2008
Externally publishedYes

Fingerprint

Dive into the research topics of 'A polymer/fullerene based photodetector with extremely low dark current for x-ray medical imaging applications'. Together they form a unique fingerprint.

Cite this