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Nugraha MI, Kumagai S, Watanabe S, et al. Enabling Ambipolar to Heavy n-Type Transport in PbS Quantum Dot Solids through Doping with Organic Molecules. ACS Appl Mater Interfaces. 2017;9(21):18039-18045doi: 10.1021/acsami.7b02867.
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 & interfaces, 9(21), 18039-18045. https://doi.org/10.1021/acsami.7b02867
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 & interfaces vol. 9,21 (2017): 18039-18045. doi: https://doi.org/10.1021/acsami.7b02867
Nugraha MI, Kumagai S, Watanabe S, Sytnyk M, Heiss W, Loi MA, Takeya J. Enabling Ambipolar to Heavy n-Type Transport in PbS Quantum Dot Solids through Doping with Organic Molecules. ACS Appl Mater Interfaces. 2017 May 31;9(21):18039-18045. doi: 10.1021/acsami.7b02867. Epub 2017 May 16. PMID: 28472887; PMCID: PMC5499821.
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ACS Appl Mater Interfaces. 2017 May 31;9(21):18039-18045. doi: 10.1021/acsami.7b02867. Epub 2017 May 16.

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

ACS applied materials & interfaces

Mohamad Insan Nugraha, Shohei Kumagai, Shun Watanabe, Mykhailo Sytnyk, Wolfgang Heiss, Maria Antonietta Loi, Jun Takeya

Affiliations

  1. Zernike Institute for Advanced Materials, University of Groningen , Nijenborgh 4, Groningen 9747AG, The Netherlands.
  2. Department of Advanced Materials Science, School of Frontier Sciences, The University of Tokyo , 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8561, Japan.
  3. JST, PRESTO , 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan.
  4. Materials for Electronics and Energy Technology (i-MEET), Friedrich-Alexander-Universität Erlangen-Nürnberg , Martensstraße 7, 91058 Erlangen, Germany.
  5. Energie Campus Nürnberg (EnCN) , Fürther Straße 250, 90429 Nürnberg, Germany.

PMID: 28472887 PMCID: PMC5499821 DOI: 10.1021/acsami.7b02867

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

Keywords: benzyl viologen; doping; field-effect transistors; ligands; quantum dots

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