Broadband, sensitive and spectrally distinctive SnS2 nanosheet/PbS colloidal quantum dot hybrid photodetector

Fast, sensitive and spectrally tuneable colloidal-quantum-dot photodetectors.

Solution-processed semiconductors are compatible with a range of substrates, which enables their direct integration with organic circuits, microfluidics, optical circuitry and commercial microelectronics. Ultrasensitive photodetectors based on solution-process colloidal quantum dots operating in both the visible and infrared have been demonstrated, but these devices have poor response times (on...

Broadband Ge/SiGe quantum dot photodetector on pseudosubstrate

: We report the fabrication and characterization of a ten-period Ge quantum dot photodetector grown on SiGe pseudosubstrate. The detector exhibits tunable photoresponse in both 3- to 5- μm and 8- to 12- μm spectral regions with responsivity values up to about 1 mA/W at a bias of -3 V and operates under normal incidence radiation with background limited performance at 100 K. The relative respons...

Quantum Dot Infrared Photodetector

In this paper an estimation for the performance of QDIP as an element of FSO communication system is given and availiable solutions are compared against the requirements of FSO communication systems. A discussion of QDIP parameters has been presented through theoretical models and experimental data from literature. A relation is proposed for QDIP carrier capture limited modulation bandwith and ...

Hybrid passivated colloidal quantum dot solids.

Colloidal quantum dot (CQD) films allow large-area solution processing and bandgap tuning through the quantum size effect. However, the high ratio of surface area to volume makes CQD films prone to high trap state densities if surfaces are imperfectly passivated, promoting recombination of charge carriers that is detrimental to device performance. Recent advances have replaced the long insulati...

Broadband InGaAs-capped InAs/GaAs quantum-dot infrared photodetector with Bi- modal dot height distributions