767 citations · 1k across the 25 of their papers we have counts for
25 papers
Ultrafast cascade charge transfer in multi bandgap colloidal quantum dot solids enables threshold reduction for optical gain and stimulated emission
Nima Taghipour, Mariona Dalmases, Guy Luke Whitworth +2
Achieving low-threshold infrared stimulated emission in solution-processed quantum dots is critical to enable real-life application including photonic integrated circuits (PICs), L…
Semi-Transparent Image Sensors for Eye-Tracking Applications
Gabriel Mercier, Emre O. Polat, Shengtai Shi +4
Image sensors hold a pivotal role in society due to their ability to capture vast amounts of information. Traditionally, image sensors are opaque due to light absorption in both th…
Colloidal quantum dot infrared lasers featuring sub-single-exciton threshold and very high gain
Nima Taghipour, Mariona Dalmases, Guy L. Whitworth +3
The use of colloidal quantum dots (CQDs) as a gain medium in infrared laser devices has been underpinned by the need for high pumping intensities, very short gain lifetimes and low…
Silver Telluride Colloidal Quantum Dot Infrared Photodetectors and Image Sensors
Yongjie Wang, Lucheng Peng, Julien Schreier +5
Photodetectors that are sensitive in shortwave infrared (SWIR) range (1 um - 2 um) are of significant interest for applications in 3D, night and adverse weather imaging, machine vi…
On-Demand Activation of Photochromic Nanoheaters for High Color Purity 3D Printing
Alexander W. Powell, Alexandros Stavrinadis, Sotirios Christodoulou +2
The creation of white and multicoloured 3D-printed objects with high colour fidelity via powder sintering processes is currently limited by discolouration from thermal sensitizers…
Visible-blind ZnMgO Colloidal Quantum Dot Downconverters expand Silicon CMOS Sensors Spectral Coverage into Ultraviolet and enable UV Band Discrimination
Avijit Saha, a Gaurav Kumar, a Santanu Pradhan +3
Selective spectral detection of ultraviolet (UV) radiation is highly important across numerous fields from health and safety to industrial and environmental monitoring applications…
Hybrid 2D-QD MoS2 PbSe Quantum Dot Broadband Photodetectors with High-Sensitivity and Room-Temperature Operation at 2.5 μm
Biswajit Kundu, Onur Özdemir, Mariona Dalmases +2
Broadband infrared photodetectors have profound importance in diverse applications including security, gas sensing, bioimaging, spectroscopy for food quality, and recycling, just t…
Low-threshold, highly stable colloidal quantum dot short-wave infrared laser enabled by suppression of trap-assisted Auger recombination
Nima Taghipour, Guy L. Whitworth, Andreas Othonos +5
Pb-chalcogenide colloidal quantum dots (CQDs) are attractive materials to be used as tuneable laser media across the infrared spectrum. However, excessive nonradiative Auger recomb…
AgBiSe2 Colloidal Nanocrystals for Use in Solar Cells
M. Zafer Akgul, Gerasimos Konstantatos
Metal selenide nanocrystals have attracted attention as promising materials in photovoltaics and thermoelectrics. However, the expensive and labor-intensive synthesis methods utili…
Highly Efficient, Bright and Stable Colloidal Quantum Dot Short-Wave Infrared Light Emitting Diodes
Santanu Pradhan, Mariona Dalmases, Ayse-Bilgehan Baspinar +1
Unbalanced charge injection is deleterious for the performance of colloidal quantum dot (CQD) light emitting diodes (LEDs) as it deteriorates the quantum efficiency (QE), brightnes…
Single-Exciton Gain and Stimulated Emission across the Infrared Telecom Band from Robust Heavily-doped PbS Colloidal Quantum Dots
Sotirios Christodoulou, Iñigo Ramiro, Andreas Othonos +6
Materials with optical gain in the infrared are of paramount importance for optical communications, medical diagnostics and silicon photonics. The current technology is based eithe…
High Sensitivity Hybrid PbS CQD-TMDC Photodetectors up to 2 m
Onur Özdemir, Iñigo Ramiro, Shuchi Gupta +1
Recent approaches to develop infrared photodetectors characterized by high sensitivities, broadband spectral coverage, easy integration with silicon electronics and low cost have b…
Size and temperature dependent intraband optical studies of heavily n-doped PbS quantum dot solids
Iñigo Ramiro, Biswajit Kundu, Mariona Dalmases +3
Steady-state access to intraband transitions in colloidal quantum dots (CQDs), via heavy doping, allows exploiting the electromagnetic spectrum at energies below the band gap. CQD…
On the Origin of Below-Bandgap Turn-On Voltage in LEDs and High VOC in Solar Cells comprising Colloidal Quantum Dots with Engineered Density of States
Santanu Pradhan, Mariona Dalmases, Gerasimos Konstantatos
The turn-on voltage of an LED is an important parameter as it determined the power consumption of the LED and influences the effective power conversion efficiency.
Solution Processed Infrared- and Thermo- Photovoltaics based on 0.7 eV Bandgap PbS Colloidal Quantum Dots
Yu Bi, Arnau Bertran, Shuchi Gupta +6
Harnessing low energy photons is of paramount importance for multi-junction high efficiency solar cells as well as for thermo-photovoltaic applications. However, semiconductor abso…
Single-Exciton Gain and Stimulated Emission Across the Infrared Optical Telecom Band from Robust Heavily-doped PbS Colloidal Quantum Dots
Sotirios Christodoulou, Iñigo Ramiro, Andreas Othonos +6
Materials with optical gain in the infrared are of paramount importance for optical communications, medical diagnostics1 and silicon photonics2,3 . The current technology is based…
Recent Progress and Future Prospects of 2D-based Photodetectors
Nengjie Huo, Gerasimos Konstantatos
Conventional semiconductors such as silicon and InGaAs based photodetectors have encountered a bottleneck in modern electronics and photonics in terms of spectral coverage, low res…
Colloidal Quantum Dot Tandem Solar Cells Using CVD Graphene as An Atomically Thin Intermediate Recombination Layer
Yu Bi, Santanu Pradhan, Mehmet Zafer Akgul +4
Two-terminal tandem cell architectures are believed to be an effective way to further improve the power conversion efficiency in solution processed photovoltaics. To design an effi…
Engineering Vacancies in Bi2S3 yields sub-Bandgap Photoresponse and highly sensitive Short-Wave Infrared Photodetectors
Nengjie Huo, Alberto Figueroba, Yujue Yang +4
Defects play an important role in tailoring the optoelectronic properties of materials. Here we demonstrate that sulphur vacancies are able to engineer sub-band photoresponse into…
High-Efficiency Light-Emitting Diodes based on Formamidinium lead bromide nanocrystals and solution processed transport layers
Francesco Di Stasio, Inigo Ramiro, Yu Bi +3
Perovskite nanocrystal light-emitting diodes (LEDs) employing architecture comprising a ZnO nanoparticles electron-transport layer and a conjugated polymer hole-transport layer hav…
High Open Circuit voltage solar cells based on bright mixed halide CsPbBrI2 perovskite nanocrystals synthesized under ambient air conditions
Sotirios Christodoulou, Francesco Di Stasio, Santanu Pradhan +2
Lead halide perovskite nanocrystals (NCs) are currently emerging as one of the most interesting solution processed semiconductors since they possess high photoluminescence quantum…
Image sensor array based on graphene-CMOS integration
Stijn Goossens, Gabriele Navickaite, Carles Monasterio +13
Integrated circuits based on CMOS (complementary metal-oxide semiconductors) are at the heart of the technological revolution of the past 40 years, as these have enabled compact an…
Achieving ultrahigh carrier mobility and photo-responsivity in solution-processed perovskite/carbon nanotubes phototransistors
Hong Wang, Feng Li, Dominik Kufer +14
Organolead trihalide perovskites have drawn substantial interest for applications in photovoltaic and optoelectronic devices due to their low processing cost and remarkable physica…
Multiband Tunable Large Area Hot Carrier Plasmonic-Crystal Photodetectors
F. Pelayo García de Arquer, Agustín Mihi, Gerasimos Konstantatos
Optoelectronic functionalities of photodection and light harnessing rely on the band-to-band excitation of semiconductors, thus the spectral response of the devices is dictated and…