KIT | KIT-Bibliothek | Impressum | Datenschutz

Semiconductor:Insulator Blends for Speed Enhancement in Organic Photodiodes

Strobel, Noah; Eckstein, Ralph; Lehr, Jonathan; Lemmer, Uli; Hernandez-Sosa, Gerardo

Abstract:
Organic photodiodes (OPDs) have been studied intensively for a number of years, as they enable low-cost fabrication of sensor systems for imaging, medical, or industrial applications. While the device performance in terms of responsivity and detectivity is continuously improving, detection speed still lags behind. One of the major limiting factors is the large transit times of the charges. In this work, an approach of blending insulating polymers into a poly(3-hexylthiophene-2,5-diyl) and [6,6]-phenyl C61 butyric acid methyl ester bulk heterojunction system, which has already shown beneficial effects on the transport properties in organic field effect transistors or organic solar cells, is followed. Starting from a basic morphological study using poly(methyl methacrylate) (PMMA) with different molecular weights, both the steady-state and dynamic characteristics of the OPDs are examined. Transient photocurrent measurements show that the inclusion of PMMA results in an increase of the −3 dB cut-off frequency without adversely affecting the device steady-state performance under illumination or in the dark. This increase is attributed to a reduced transit time in the active layer when PMMA is present.



Originalveröffentlichung
DOI: 10.1002/aelm.201700345
Scopus
Zitationen: 3
Web of Science
Zitationen: 3
Zugehörige Institution(en) am KIT Institut für Mikrostrukturtechnik (IMT)
Lichttechnisches Institut (LTI)
Publikationstyp Zeitschriftenaufsatz
Jahr 2018
Sprache Englisch
Identifikator ISSN: 2199-160X
KITopen-ID: 1000078266
HGF-Programm 43.22.03 (POF III, LK 01)
Erschienen in Advanced electronic materials
Band 4
Heft 10
Seiten Article no 1700345
Vorab online veröffentlicht am 29.12.2017
Externe Relationen Siehe auch
Nachgewiesen in Scopus
Web of Science
KIT – Die Forschungsuniversität in der Helmholtz-Gemeinschaft
KITopen Landing Page