Improving spray coated organic photodetectors performance by using 1,8-diiodooctane as processing additive

Journal article
(Original article)


Publication Details

Author(s): Montenegro Benavides C, Rechberger S, Spiecker E, Berlinghof M, Unruh T, Biele M, Schmidt O, Brabec C, Tedde SF
Journal: Organic Electronics
Publication year: 2018
Pages range: 21-26
ISSN: 1566-1199
Language: English


Abstract


In this work, we present and support the positive influence of 1,8-diiodooctane (DIO) as processing additive for the fabrication of solution processed near infrared (NIR) organic photodiodes (OPDs) based on the spray-coated blend of [6,6]phenyl-C70-butyric acid methyl ester (PC70BM) and poly[(2,5-bis(2-hexyldecyl)-2,3,5,6-tetrahydro-3,6-diox-opyrrolo[3,4-c]pyrrole-1,4-diyl)-alt-([2,2’:5′,2″-terthiophene]-5,5″-diyl)] (PDPP3T). Transmission electron microscopy (TEM) analysis show that the use of DIO improves donor–acceptor interfaces in the bulk heterojunction (BHJ) layer. Besides the enhancement of electron/hole transport pathways that leads to higher efficiencies, it reduces significantly the roughness of spray coated layers. The External Quantum Efficiency (EQE) is increased up to 35% at 900 nm and the dark current is decreased one order of magnitude in comparison to the reference down to 20 nA/cm2 at -5 V. The OPD's detectivity is increased from 1.66×1011 Jones to 3.34×1012 Jones and the linearity response is improved. A comprehensive morphological and electro-optical characterization of the generated layers and devices is the main focus of this work.



FAU Authors / FAU Editors

Berlinghof, Marvin
Professur für Nanomaterialcharakterisierung (Streumethoden)
Brabec, Christoph Prof. Dr.
Institute Materials for Electronics and Energy Technology (i-MEET)
Montenegro Benavides, Cindy
Institute Materials for Electronics and Energy Technology (i-MEET)
Rechberger, Stefanie Dr.
Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung)
Spiecker, Erdmann Prof. Dr.
Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung)
Unruh, Tobias Prof. Dr.
Professur für Nanomaterialcharakterisierung (Streumethoden)


Additional Organisation
Graduiertenkolleg 1896/2 In situ Mikroskopie mit Elektronen, Röntgenstrahlen und Rastersonden


External institutions
Siemens AG, Healthcare Sector


How to cite

APA:
Montenegro Benavides, C., Rechberger, S., Spiecker, E., Berlinghof, M., Unruh, T., Biele, M.,... Tedde, S.F. (2018). Improving spray coated organic photodetectors performance by using 1,8-diiodooctane as processing additive. Organic Electronics, 21-26. https://dx.doi.org/10.1016/j.orgel.2017.12.022

MLA:
Montenegro Benavides, Cindy, et al. "Improving spray coated organic photodetectors performance by using 1,8-diiodooctane as processing additive." Organic Electronics (2018): 21-26.

BibTeX: 

Last updated on 2019-06-02 at 16:27