TIPS Pentacene as a Beneficial Interlayer for Organic Photodetectors in Imaging Applications

Montenegro Benavides C, Biele M, Schmidt O, Brabec C, Tedde SF (2018)

Publication Language: English

Publication Status: Published

Publication Type: Journal article, Original article

Publication year: 2018

Journal

IEEE Transactions on Electron Devices Institute of Electrical and Electronics Engineers (IEEE)

Publisher: Institute of Electrical and Electronics Engineers Inc.

DOI: 10.1109/TED.2018.2799705

Abstract

The small molecule 6,13-bis (triisopropylsilylethynyl) (TIPS) pentacene has been used
as an interlayer for the reduction of dark currents in organic photodetectors (OPDs) based on a bulk heterojunction of poly-3-hexyl-thiophene(P3HT) and [6, 6]-phenyl C61 butyric
acid methyl ester. We report OPDs with dark currents of ∼0.9 nA/cm2 at −5 V and external quantum efficiencies close to 80% at 530 nm. Compared to the reference, P3HT
interlayer, TIPS pentacene shows a significant increase of the OPD’s detectivity from 3.29 × 1012 to 1.63 × 1013 Jones. Also, the OPD’s dynamic range is improved reducing the
limit of signal detection from 132 to 6.3 nW/cm2 under green light irradiation. Singular hysteresis in the I–V characteristic curve has been observed and impedance spectroscopy
measurements were carried out to analyze its origin and generate a replacement electrical model for the device at reverse bias. Finally, OPDs with TIPS pentacene interlayer have been integrated on top of amorphous silicon thin-film transistor backplanes to obtain the first OPD-based image sensor using this interlayer.

Authors with CRIS profile

Cindy Montenegro Benavides Institute Materials for Electronics and Energy Technology (i-MEET) Christoph Brabec Institute Materials for Electronics and Energy Technology (i-MEET)

Involved external institutions

Siemens AG, Healthcare Sector DE Germany (DE)

How to cite

APA:

Montenegro Benavides, C., Biele, M., Schmidt, O., Brabec, C., & Tedde, S.F. (2018). TIPS Pentacene as a Beneficial Interlayer for Organic Photodetectors in Imaging Applications. IEEE Transactions on Electron Devices. https://dx.doi.org/10.1109/TED.2018.2799705

MLA:

Montenegro Benavides, Cindy, et al. "TIPS Pentacene as a Beneficial Interlayer for Organic Photodetectors in Imaging Applications." IEEE Transactions on Electron Devices (2018).

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