Narrowband colloidal quantum dot photodetectors for wavelength measurement applications

Nanoscale ◽  
2020 ◽  
Vol 12 (18) ◽  
pp. 10044-10050 ◽  
Author(s):  
Andrea De Iacovo ◽  
Carlo Venettacci ◽  
Carlo Giansante ◽  
Lorenzo Colace
Keyword(s):  
Quantum Dot ◽  
Wavelength Measurement ◽  
System P ◽  
Colloidal Quantum Dot ◽  
Pbs Quantum Dot

PbS quantum dot narrowband photoconductors employed for the realization of a compact wavelength-meter system.

scholarly journals Correlating Spatially Resolved Photoconductivity and Luminescence in Colloidal Quantum Dot Films

Proceedings ◽  
2021 ◽  
Vol 56 (1) ◽  
pp. 39
Author(s):  
Emil Kelderer ◽  
Dario Grimaldi ◽  
Andreas Hohenau ◽  
Harald Ditlbacher ◽  
Joachim R. Krenn
Keyword(s):  
Quantum Dot ◽  
Laser Scanning ◽  
Optical Microscope ◽  
Lead Sulphide ◽  
Charge Dynamics ◽  
Spatially Resolved ◽  
Colloidal Quantum Dot ◽  
Nanogap Electrodes ◽  
Carrier Extraction ◽  
Pbs Quantum Dot

We investigated the optoelectronic properties of lead sulphide (PbS) quantum dot films in lithographically tailored gold nanogap electrodes. In particular, we aimed at the correlated measurement of photoconductivity and luminescence as a tool to characterize the charge dynamics from exciton generation to carrier extraction and recombination. Combining these measurements in an optical microscope with laser scanning excitation enabled, as well, the spatially resolved observation of the involved effects.

scholarly journals Photoconductivity of Colloidal Quantum Dot Films in Plasmonic Nanogaps

Proceedings ◽  
2020 ◽  
Vol 56 (1) ◽  
pp. 23
Author(s):  
Dario Grimaldi ◽  
Emil Kelderer ◽  
Andreas Hohenau ◽  
Harald Ditlbacher ◽  
Joachim R. Krenn
Keyword(s):  
Quantum Dots ◽  
Quantum Dot ◽  
Power Law ◽  
Spatial Dependence ◽  
Gold Electrodes ◽  
Lead Sulphide ◽  
Photocurrent Generation ◽  
Colloidal Quantum Dot ◽  
Pbs Quantum Dot

We investigate the photoconductivity properties of lead sulphide (PbS) quantum dot ensembles in lithographically tailored gold electrodes with smallest gaps of 15 nm. We demonstrate that quantum dots are reliable nanoscale light/current converters and correlate the measured photocurrents to the quantum dot number, the gap voltage and light irradiance. For the latter, we find a photocurrent power law dependence with an exponent of 2/3. Furthermore, we probe the role of plasmonic effects in the gold electrodes and image by scanning photocurrent microscopy the spatial dependence of photocurrent generation.

A p-Type PbS Quantum Dot Ink with Improved Stability for Solution Processable Optoelectronics

2021 ◽  
Author(s):  
Fiaz Ahmed ◽  
John Hardin Dunlap ◽  
Perry J. Pellechia ◽  
Andrew Greytak
Keyword(s):  
Quantum Dot ◽  
Ligand Exchange ◽  
Chemical Characterization ◽  
Single Step ◽  
Improved Stability ◽  
Solution Processable ◽  
P Type ◽  
Pbs Quantum Dot

A highly stable p-type PbS-QDs ink is prepared using a single-step biphasic ligand exchange route, overcoming instability encountered in previous reports. Chemical characterization of the ink reveals 3-mercaptopriopionic acid (MPA)...

Buffer Layered PbS Colloidal Quantum Dot Solar Cell With Enhanced Efficiency

2021 ◽  
Author(s):  
Faisal Saeed ◽  
Haider Ali Tauqeer ◽  
Asad Idrees ◽  
Muhammad Zeeshan Ali ◽  
Ali Raza ◽  
...  
Keyword(s):  
Solar Cell ◽  
Quantum Dot ◽  
Colloidal Quantum Dot

scholarly journals Author Correction: Evolution from unimolecular to colloidal-quantum-dot-like character in chlorine or zinc incorporated InP magic size clusters

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Yongju Kwon ◽  
Juwon Oh ◽  
Eunjae Lee ◽  
Sang Hyeon Lee ◽  
Anastasia Agnes ◽  
...  
Keyword(s):  
Quantum Dot ◽  
Colloidal Quantum Dot

A Correction to this paper has been published: https://doi.org/10.1038/s41467-021-22007-4

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