Journal Article

IMPULSE-2021-00144

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Spray-deposited PbS colloidal quantum dot solid for near-infrared photodetectors

Chen, W. ; Tang, H. ; Chen, Y. ; Heger, J. E. ; Li, N. ; Kreuzer, L. P. ; Xie, Y. ; Li, D. ; Anthony, C. ; Pikramenou, Z. ; Ng, K. W. ; Sun, X. W. ; Wang, K. ; Müller-Buschbaum, P.MLZ*

2020
Elsevier Amsterdam [u.a.]

Please use a persistent id in citations: doi:10.1016/j.nanoen.2020.105254

Abstract: Colloidal PbS quantum dots (QDs) are promising candidates for various optoelectronic applications based on solution-processed thin-film techniques. In this work, a versatile layer-by-layer (LBL) spray deposition of the QDs is introduced aiming for a future large-scale fabrication process of optoelectronic devices. As compared to spin-coated QD solids, a smaller inter-dot distance and a better-ordered superlattice stacking behavior of the QDs are found in the spray-deposited QD solids as confirmed by grazing-incidence small-angle X-ray scattering (GISAXS). The spectral mapping combined time-resolved photoluminescence analysis indicates a longer charge carrier lifetime and better order of the energy state distribution of the spray-deposited QD solid comparing with the spin-coated one. Thus, photodetectors based on spray deposition of QD solids demonstrate an excellent device performance, with the responsivity achieving 365.1 A/W and the detectivity reaching up to 1.4 × 1012 Jones under an illumination power of 63.5 μW/cm2 at a wavelength of 1250 nm. The spray-deposited device performances indicate a great potential of spray deposition of large sized QDs in large-scale fabrications for optoelectronics using longer wavelengths.Graphical abstract

Keyword(s): Chemical Reactions and Advanced Materials (1st) ; Chemistry (2nd) ; Soft Condensed Matter (2nd) ; Condensed Matter Physics (2nd)

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Contributing Institute(s):

1. E13 (E13)
2. MLZ (MLZ)

Experiment(s):

1. No specific instrument

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Database coverage:
; Clarivate Analytics Master Journal List ; Current Contents - Engineering, Computing and Technology ; Current Contents - Physical, Chemical and Earth Sciences ; Essential Science Indicators ; IF >= 15 ; JCR ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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