Extended spectral response in organic photomultiple photodetectors using multiple near-infrared dopants

Shao Tang Chuang, Shang Chieh Chien, Fang-Chung Chen*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

40 Scopus citations

Abstract

We demonstrate highly sensitive polymer photodetectors (OPDs) with spectral response extending from the ultraviolet to the near-infrared (NIR) region (∼1200 nm). After doping two NIR dopants, high external quantum efficiencies (∼5500%) and high responsivities (23.0 A/W) are achieved under a low reverse bias (-3.7 V). The high gains could be attributed to unbalanced carrier transport in the photoactive layer arising from the electron traps at the NIR dopants. This approach allows the ready preparation of OPDs exhibiting broad spectral responses and high quantum efficiencies simultaneously.

Original languageEnglish
Article number013309
Number of pages3
JournalApplied Physics Letters
Volume100
Issue number1
DOIs
StatePublished - 2 Jan 2012

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