Fully Printed Infrared Photodetectors from PbS Nanocrystals with Perovskite Ligands

YousefiAmin, AmirAbbas; Killilea, Niall A.; Sytnyk, Mykhailo; Maisch, Philipp; Tam, Ka Cheong; Egelhaaf, Hans‐Joachim; Langner, Stefan; Stubhan, Tobias; Brabec, Christoph J.; Rejek, Tobias; Halik, Marcus; Poulsen, Katharina; Niehaus, Jan; Köck, Anton; Heiß, Wolfgang

doi:10.1021/acsnano.8b09223

Cited by 30 publications

(40 citation statements)

References 58 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In this case, small nanocrystals (3-4 nm) are used. To reach the SWIR range 27,28 , larger nanocrystals around 8 nm are necessary. Such sizes are nevertheless acceptable to obtain colloidally stable solutions.…”

Section: Introductionmentioning

confidence: 99%

HgTe Nanocrystals for SWIR Detection and Their Integration up to the Focal Plane Array

Chu

Martinez

Ferré³

et al. 2019

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

Infrared applications remain too often a niche market due to their prohibitive cost. Nanocrystals offer an interesting alternative to reach cost disruption especially in the shortwave infrared (SWIR, λ<1.7 µm) where material maturity is now high. Two families of materials are candidate for SWIR photoconduction: lead and mercury chalcogenides. Lead sulfide typically benefits from all the development made for wider bap gap such as the one made for solar cells, while HgTe takes advantage of development relative to mid wave infrared detector. Here we make a fair comparison of the two material detection properties in the SWIR and discuss the material stability. At such wavelengths, studies have been mostly focused on PbS rather than on HgTe, therefore we focus in the last part of the discussion on the effect of surface chemistry on the electronic spectrum of HgTe nanocrystals. We unveil that tuning the capping ligands is a viable strategy to adjust the material from p-type to ambipolar. Finally, HgTe nanocrystals are integrated into multi pixel devices to quantize spatial homogeneity and onto read out circuits to obtain fast and sensitive infrared laser beam profile.

show abstract

Section: Introductionmentioning

confidence: 99%

HgTe Nanocrystals for SWIR Detection and Their Integration up to the Focal Plane Array

Chu

Martinez

Ferré³

et al. 2019

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

show abstract

“…25,31 Mora-Seró and co-workers observed a tunable exciplex emission from QD -MHPs for designing intermediate-band photovoltaics and NIR LEDs and detectors. [32][33][34][35] More recently, epitaxial seeding of PbS QDs in MHPs has enabled "lattice anchoring" to strain and stabilize a thermodynamically unstable phase of CsPbI 3-x Br x in ambient. 26 Additionally, PbS QDs in MHP single crystals have shown promise for use in resistive switching.…”

mentioning

confidence: 99%

Embedding PbS Quantum Dots (QDs) in Pb-Halide Perovskite Matrices: QD Surface Chemistry and Antisolvent Effects on QD Dispersion and Confinement Properties

Gaulding

Chen

Yang

et al. 2020

ACS Materials Lett.

View full text Add to dashboard Cite

Hybrid materials of metal chalcogenide colloidal quantum dots (QDs) embedded in metal halide perovskites (MHPs) have led to composites with synergistic properties. Here, we investigate how QD size, surface chemistry, and MHP film formation methods affect the resulting optoelectronic properties of QD/MHP "dot-in-matrix" systems. We monitor the QD absorption and photoluminescence throughout synthesis, ligand exchange and transfer into the MHP ink, and characterize the final QD/MHP films via electron microscopy, and transient absorption. Additionally, we are the first to globally map how PbS QDs are distributed on the micron scale within these dot-in matrix systems using 3D tomography time-offlight secondary ion mass spectrometry. The surface chemistry imparted during synthesis directly affects the optical properties of the dot-in-matrix composites. Pb-halide passivation leads to QD/MHP dot-inmatrix samples with optical properties that are well-described by a theoretical model based on a Type-I finite barrier heterostructure between the PbS QD and the MHP matrix. Samples without Pb-halide passivation show complicated size-dependent behavior, indicating a transition from a Type-I heterostructure between the PbS QD wells and MHP barriers for small sized QDs to PbS QDs that are electronically decoupled from the MHP matrix for larger QDs. Furthermore, the choice in perovskite antisolvent crystallization method leads to a difference in the spatial QD distribution within the perovskite matrix, differences in carrier lifetime, and photoluminescence shifts of up to 180 meV for PbS in methylammonium lead iodide. This work establishes an understanding of such emerging synergistic systems relevant for technologies such as photovoltaics, IR-emitters and detectors, and other unexplored technological applications.

show abstract

“…For the subnano thickness of the perovskite shells, they are sometimes referred to as perovskite ligands. [138,152] The reversestructured perovskite-PbS core-shell heterojunctions were not revealed until 2018. Zhang et al reported the synthesis of thin PbS shell-capped CsPbI 3 NCs (Figure 19c).…”

Section: Subnanometric Heterojunctions: Inorganicmentioning

confidence: 99%

Perovskite Nano‐Heterojunctions: Synthesis, Structures, Properties, Challenges, and Prospects

Wang

2020

Small Structures

View full text Add to dashboard Cite

Scientific and industrial interest on perovskite semiconductor materials has grown rapidly in recent years. Through the efforts of researchers professionals in chemistry, physics, materials and electronics, etc., many records based on perovskites have been and are being refreshed. The brilliant performances emerge not only from the excellent properties of perovskite themselves, but also originate from the composite material systems of hybridizing perovskites with heteromaterials. Herein, first, the crystal and nanostructures of perovskite materials, semiconductor-based heterojunctions, and the categories of perovskite heterojunction are fundamentally introduced. Then, the state-of-the-art synthesis methods, size and structure control, electron structure-related physical properties, and applications of the perovskite-based nano-heterojunctions are comprehensively reviewed. Finally, perspectives on tackling challenges and developing trends are discussed.

show abstract

Fully Printed Infrared Photodetectors from PbS Nanocrystals with Perovskite Ligands

Cited by 30 publications

References 58 publications

HgTe Nanocrystals for SWIR Detection and Their Integration up to the Focal Plane Array

HgTe Nanocrystals for SWIR Detection and Their Integration up to the Focal Plane Array

Embedding PbS Quantum Dots (QDs) in Pb-Halide Perovskite Matrices: QD Surface Chemistry and Antisolvent Effects on QD Dispersion and Confinement Properties

Perovskite Nano‐Heterojunctions: Synthesis, Structures, Properties, Challenges, and Prospects

Contact Info

Product

Resources

About