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Micro-Transfer-Printing of Al2O3-Capped Short-Wave-Infrared PbS Quantum Dot Photoconductors

Nayyera Mahmoud (UGent) , Willem Walravens (UGent) , Jakob Kuhs (UGent) , Christophe Detavernier (UGent) , Zeger Hens (UGent) and Günther Roelkens (UGent)
(2019) ACS APPLIED NANO MATERIALS. 2(1). p.299-306
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Center for nano- and biophotonics (NB-Photonics)
Abstract
Quantum dots (QDs) have attracted considerable attention in the development of various optoelectronic applications. The scalable heterogeneous integration of high quality, yet stable QD films is required for low-cost devices based on these materials. Here, we demonstrate the transfer printing of microscale patterns of Al2O3-capped PbS QD films to realize large-scale integrated photodetector arrays with a first excitonic absorption peak at 2.1 mu m wavelength. The process provides a facile approach to selectively pick-and-print QD assemblies on device structures with high precision. Transfer-printed photoconductor devices were realized and characterized at low bias voltage and optical power. Under 10 nW surface normal illumination at 2.1 mu m wavelength, the responsivity of our devices obtained at 1 V bias reached a maximum value of 25 A/W and 85 A/W for PbS QD films of 88 and 140 nm thick, respectively. Our approach suggests new routes toward scalable and cost-effective integration of multiple high-quality QD stacks on electronic and optoelectronic circuits.
Keywords
short-wave infrared, colloidal quantum dots, ALD, micro-transfer-printing, photoconductors, TRANSISTORS, OXIDE

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Citation

Please use this url to cite or link to this publication:

Chicago
Mahmoud, Nayyera, Willem Walravens, Jakob Kuhs, Christophe Detavernier, Zeger Hens, and Günther Roelkens. 2019. “Micro-Transfer-Printing of Al2O3-Capped Short-Wave-Infrared PbS Quantum Dot Photoconductors.” Acs Applied Nano Materials 2 (1): 299–306.
APA
Mahmoud, N., Walravens, W., Kuhs, J., Detavernier, C., Hens, Z., & Roelkens, G. (2019). Micro-Transfer-Printing of Al2O3-Capped Short-Wave-Infrared PbS Quantum Dot Photoconductors. ACS APPLIED NANO MATERIALS, 2(1), 299–306.
Vancouver
1.
Mahmoud N, Walravens W, Kuhs J, Detavernier C, Hens Z, Roelkens G. Micro-Transfer-Printing of Al2O3-Capped Short-Wave-Infrared PbS Quantum Dot Photoconductors. ACS APPLIED NANO MATERIALS. 2019;2(1):299–306.
MLA
Mahmoud, Nayyera et al. “Micro-Transfer-Printing of Al2O3-Capped Short-Wave-Infrared PbS Quantum Dot Photoconductors.” ACS APPLIED NANO MATERIALS 2.1 (2019): 299–306. Print.
@article{8616905,
  abstract     = {Quantum dots (QDs) have attracted considerable attention in the development of various optoelectronic applications. The scalable heterogeneous integration of high quality, yet stable QD films is required for low-cost devices based on these materials. Here, we demonstrate the transfer printing of microscale patterns of Al2O3-capped PbS QD films to realize large-scale integrated photodetector arrays with a first excitonic absorption peak at 2.1 mu m wavelength. The process provides a facile approach to selectively pick-and-print QD assemblies on device structures with high precision. Transfer-printed photoconductor devices were realized and characterized at low bias voltage and optical power. Under 10 nW surface normal illumination at 2.1 mu m wavelength, the responsivity of our devices obtained at 1 V bias reached a maximum value of 25 A/W and 85 A/W for PbS QD films of 88 and 140 nm thick, respectively. Our approach suggests new routes toward scalable and cost-effective integration of multiple high-quality QD stacks on electronic and optoelectronic circuits.},
  author       = {Mahmoud, Nayyera and Walravens, Willem and Kuhs, Jakob and Detavernier, Christophe and Hens, Zeger and Roelkens, G{\"u}nther},
  issn         = {2574-0970},
  journal      = {ACS APPLIED NANO MATERIALS},
  language     = {eng},
  number       = {1},
  pages        = {299--306},
  title        = {Micro-Transfer-Printing of Al2O3-Capped Short-Wave-Infrared PbS Quantum Dot Photoconductors},
  url          = {http://dx.doi.org/10.1021/acsanm.8b01915},
  volume       = {2},
  year         = {2019},
}

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