Enabling Ambipolar to Heavy n-Type Transport in PbS Quantum Dot Solids through Doping with Organic Molecules

Beitrag in einer Fachzeitschrift


Details zur Publikation

Autorinnen und Autoren: Nugraha MI, Kumagai S, Watanabe S, Sytnyk M, Heiß W, Loi MA, Takeya J
Zeitschrift: ACS Applied Materials and Interfaces
Verlag: AMER CHEMICAL SOC
Jahr der Veröffentlichung: 2017
Band: 9
Heftnummer: 21
Seitenbereich: 18039-18045
ISSN: 1944-8244


Abstract


PbS quantum dots (QDs) are remarkable semiconducting materials, which are compatible with low-cost solution-processed electronic device fabrication. Understanding the doping of these materials is one of the great research interests, as it is a necessary step to improve the device performance as well as to enhance the applicability of this system for diverse optoelectronic applications. Here, we report the efficient doping of the PbS QD films with the use of solution-processable organic molecules. By engineering the energy levels of the donor molecules and the PbS QDs through the use of different cross-linking ligands, we are able to control the characteristics of PbS field-effect transistors (FETs) from ambipolar to strongly n-type. Because the doping promotes trap filling, the charge carrier mobility is improved up to 0.64 cm(-2) V-1 s(-1), which is the highest mobility reported for low-temperature processed PbS FETs employing SiO2 as the gate dielectric. The doping also reduces the contact resistance of the devices, which can also explain the origin of the increased mobility.



FAU-Autorinnen und Autoren / FAU-Herausgeberinnen und Herausgeber

Heiß, Wolfgang Prof. Dr.
Professur für Werkstoffwissenschaften (lösungsprozessierte Halbleitermaterialien)
Sytnyk, Mykhailo
Lehrstuhl für Werkstoffwissenschaften (Materialien der Elektronik und der Energietechnologie)


Zusätzliche Organisationseinheit(en)
Lehrstuhl für Werkstoffwissenschaften (Materialien der Elektronik und der Energietechnologie)


Einrichtungen weiterer Autorinnen und Autoren

University of Groningen / Rijksuniversiteit Groningen
University of Tokyo


Forschungsbereiche

Neue Materialien und Prozesse
Forschungsschwerpunkt einer Fakultät: Technische Fakultät


Zitierweisen

APA:
Nugraha, M.I., Kumagai, S., Watanabe, S., Sytnyk, M., Heiß, W., Loi, M.A., & Takeya, J. (2017). Enabling Ambipolar to Heavy n-Type Transport in PbS Quantum Dot Solids through Doping with Organic Molecules. ACS Applied Materials and Interfaces, 9(21), 18039-18045. https://dx.doi.org/10.1021/acsami.7b02867

MLA:
Nugraha, Mohamad Insan, et al. "Enabling Ambipolar to Heavy n-Type Transport in PbS Quantum Dot Solids through Doping with Organic Molecules." ACS Applied Materials and Interfaces 9.21 (2017): 18039-18045.

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Zuletzt aktualisiert 2019-20-03 um 11:38