Article
Nanoscience & Nanotechnology
Shouzhe Feng, Yujie Zhang, Pengjie Zhang, Jun Cao, Jingjing Wang, Yingying Zheng, Lei Shi, Jiaqi Pan, Chaorong Li
Summary: In this study, a CuI/BaSnO3 quantum dot (QD)/ZnSnO3 perovskite-based transparent p-n junction was prepared using a hybrid approach. The resulting p-n junction showed high transmittance and photovoltaic enhancement, leading to a respectable photovoltaic conversion efficiency. The stability of the p-n junction over a long period of time was also demonstrated. The remarkable performance can be mainly attributed to the use of BaSnO3 QD and the presence of additional hole-related carriers caused by Cu vacancy.
ACS APPLIED NANO MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Riya Dutta, Avradip Pradhan, Praloy Mondal, Saloni Kakkar, T. Phanindra Sai, Arindam Ghosh, Jaydeep Kumar Basu
Summary: Hybrid devices consisting of graphene or TMDs and semiconductor QDs have been widely studied for photodetector and photovoltaic applications, requiring high IQE and enhanced carrier diffusion length. Electrical measurements on such devices showed high IQE and significant enhancement of carrier diffusion length, which could be tuned by varying back gate voltage and controlling charge separation from the proximal QD layer. The obtained IQE values were remarkably high, and further improvement could be achieved by stacking multiple layers of QDs for potential applications in high-efficiency photodetectors and active photovoltaic materials.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Materials Science, Multidisciplinary
Xinmei Liu, Farsad Imtiaz Chowdhury, Lingju Meng, Qiwei Xu, Xihua Wang
Summary: This study introduces a method for preparing high-quality luminescent films using QD-CNC hybrid materials, which involves replacing the organic ligands on the QD surface and acetylating the CNC surface to overcome the challenge of dissolving QD and environmentally friendly material CNC simultaneously. The fabricated film maintains similar photoluminescence quantum yield and lifetime to QDs synthesized in non-polar organic solvents.
Article
Materials Science, Multidisciplinary
Anju Elsa Tom, Ajith Thomas, Ajeesh Kumar Somakumar, Libin Kuriakose, V. V. Ison
Summary: A hybrid solid-state ligand exchange strategy was developed using inorganic ligand TBAI and organic ligand EDT, which resulted in improved performance of QDs films. The method integrates the benefits of both ligands and resolves the incomplete solid-state ligand exchange, leading to enhanced power conversion efficiency.
Article
Chemistry, Physical
Jae-Hwan Choi, Min -Jae Si, Sol -Hee Kim, Nipuni Maniyamgama, Dongeon Kim, Seungin Jee, Yun Hoo Kim, Hoon-Seok Jeong, Beomkwan Kim, Changjo Kim, Jung -Yong Lee, Se-Woong Baek
Summary: This study demonstrates the successful preparation of a stable hybrid ink by modifying the synthesis route of nanoparticles, which enables the formation of efficient heterostructured thin films and improves the power conversion efficiency of solar cells.
APPLIED SURFACE SCIENCE
(2023)
Article
Energy & Fuels
J. L. Frieiro, J. Lopez-Vidrier, O. Blazquez, J. Ibanez, D. Yazicioglu, S. Gutsch, M. Zacharias, B. Garrido, S. Hernandez
Summary: The study reveals that achieving a low resistance state through resistive switching (RS) in metal-oxide-semiconductor devices containing Si nanocrystal superlattices can enhance the extraction of photogenerated carriers, improve conductivity, and increase the collection probability of photogenerated carriers, ultimately enhancing conversion efficiency.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2021)
Article
Chemistry, Multidisciplinary
Junwei Liu, Jiawei Qiao, Kangkang Zhou, Jingjing Wang, Ruohua Gui, Kaihu Xian, Mengyuan Gao, Hang Yin, Xiaotao Hao, Zhihua Zhou, Long Ye
Summary: This study proposes a facile polymer blending strategy for directly synthesized CQD/polymer hybrid solar cells with a champion efficiency of 13%, leveraging optimized aggregation behaviors of conjugated polymer blends. The strategy also provides a dilution effect for photovoltaic polymers with excessively strong aggregation tendency, resulting in fast carrier transport and high photovoltaic performance. The relationships between polymer morphology, carrier transport, and photovoltaic performance are established to advance the progress of CQD/polymer hybrid solar cells.
Article
Chemistry, Physical
Naveen Kumar, Umme Farva, Malkeshkumar Patel, Wu-Shin Cha, Jaehyeong Lee, Joondong Kim
Summary: In this study, a novel, eco-friendly sputtergrown p-n heterojunction thin-film device utilizing n-Ga2O3 and p-SnS was proposed and investigated for transparent photovoltaic (TPV) applications. By optimizing the thickness of Ga2O3 thin-film, the device achieved high photocurrent density and open-circuit voltage, demonstrating excellent photovoltaic performance.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Multidisciplinary
Marcel Meyer, Corentin Deprez, Timo R. van Abswoude, Ilja N. Meijer, Dingshan Liu, Chien-An Wang, Saurabh Karwal, Stefan Oosterhout, Francesco Borsoi, Amir Sammak, Nico W. Hendrickx, Giordano Scappucci, Menno Veldhorst
Summary: This article introduces a method of voltage adjustment using the gate voltage characteristics to achieve uniformity in the pinch-off voltages of quantum dots. The method is demonstrated to increase the stability of the quantum dots and offers new possibilities for scalable spin qubit arrays.
Article
Optics
V Blondot, C. Arnold, A. Delteil, D. Gerard, A. Bogicevic, T. Pons, N. Lequeux, J. P. Hugonin, J. J. Greffet, S. Buil, J. P. Hermier
Summary: We report the synthesis of hybrid light emitting particles with a diameter ranging from 100 to 500 nm, consisting of a compact CdSe/CdS/CdZnS semiconductor nanocrystal aggregate encapsulated by controlled nanometric size silica and gold layers. The addition of the gold nanoshell enhances the Purcell decay rate, as predicted by numerical simulations. Furthermore, we demonstrate the inhibition of Forster resonance energy transfer contribution.
Article
Chemistry, Multidisciplinary
Lior Asor, Jing Liu, Shuting Xiang, Nir Tessler, Anatoly I. Frenkel, Uri Banin
Summary: Doped heavy metal-free III-V semiconductor nanocrystal quantum dots (QDs) have attracted great interest for both their fundamental doping characteristics and their applicability in p-n homojunction devices. In this study, p-type doping of InAs NCs was achieved through the use of Zn, allowing for control over the charge carrier type in InAs QDs field effect transistors. X-ray absorption spectroscopy analysis confirmed substitutional doping by Zn2+ replacing In3+. Surface passivation by Zn was also observed, leading to enhanced near infrared photoluminescence. This research paves the way for the fabrication of optoelectronic devices active in the short-wave infrared region using heavy-metal free nanocrystal building blocks.
ADVANCED MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
Rekha Mahadevu, Triloki Pandit, Jibin J. Samuel, Uddipan Ghosh, Biman Jana, Hridesh Kumar Gupta, Nagaphani Aetukuri, Anshu Pandey
Summary: We have discovered the emergence of photocapacitance in two-dimensional layered nanocrystal assemblies. By applying a lateral bias across interdigitated electrodes, we electrically probe the devices and observe capacitive current-voltage characteristics that are absent in the individual nanocrystals. In addition to a large zero-bias capacitance, the assemblies exhibit a transient negative capacitive behavior with small signal capacitance values ranging from +/- 100 nF. We demonstrate that this system behaves as a damped anharmonic oscillator and show the modulation of capacitive behavior by incident light, making these materials suitable for photocapacitive detector devices.
ACS APPLIED ELECTRONIC MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Emmanuel K. Ampadu, Jungdong Kim, Eunsoon Oh
Summary: A lateral photovoltaic device was fabricated for infrared to terahertz detection by chemically depositing PbS films on titanium substrates. Material properties of PbS films on glass were discussed, and the device operated at room temperature with a wavelength range up to 50 μm, making it highly applicable in various fields.
Article
Materials Science, Multidisciplinary
Guanwei Liang, Yong Tang, Peisen Chen, Jiasheng Li, Yikai Yuan, Shudong Yu, Liang Xu, Zongtao Li
Summary: The study presents an optical diffuser based on polystyrene-fiber rods dispersed in polydimethylsiloxane resin, which shows excellent light-scattering performance and efficient light diffusion in the visible-light region. By filling PFRs in quantum dot films, the photoluminescence intensity is enhanced, showing potential for optical performance improvement in QD-based LEDs.
ACS APPLIED POLYMER MATERIALS
(2022)
Article
Chemistry, Physical
Jinhyeon Kang, Jae Taek Oh, Hyeokjun Kim, Hanjae Kim, Hyosung Choi, In Hwan Jung
Summary: This study reports the development of high-performance AgBiS2 nanocrystal-based quantum-dot photodetectors (QPDs) with improved photodetection ability. A novel conjugated polyelectrolyte (CPE) was incorporated as a cathode buffer layer (CBL) to enhance the photocurrent density and reduce the dark current density.
APPLIED SURFACE SCIENCE
(2022)
Article
Physics, Multidisciplinary
Vladislav Yu. Shishkov, Evgeny S. Andrianov, Anton V. Zasedatelev, Pavlos G. Lagoudakis, Yurii E. Lozovik
Summary: In this study, we analytically describe a nonequilibrium polariton Bose-Einstein condensate (BEC) by solving the master equation for the full polariton density matrix in the fast thermalization limit. We find that the density matrix of a nonequilibrium BEC incorporates quantum correlations between all polariton states, and the formation of BEC is accompanied by the emergence of cross-correlations between the ground state and the excited states. Despite being a nonequilibrium system, the average population of polariton states follows the Bose-Einstein distribution with an almost zero effective chemical potential above the condensation threshold, similar to an equilibrium BEC. Moreover, we demonstrate that the effective temperature of polaritons drops below the reservoir temperature above threshold.
PHYSICAL REVIEW LETTERS
(2022)
Article
Physics, Multidisciplinary
S. Baryshev, A. Zasedatelev, H. Sigurdsson, I Gnusov, J. D. Topfer, A. Askitopoulos, P. G. Lagoudakis
Summary: In this study, we conducted full polarization tomography on photon correlations in a spinor exciton-polariton condensate. Our measurements demonstrate the different forms of condensate pseudospin mean-field dynamics and their intrinsic relation to the condensate photon statistics.
PHYSICAL REVIEW LETTERS
(2022)
Article
Energy & Fuels
Malek Rwaimi, Christopher G. Bailey, Peter J. Shaw, Thomas M. Mercier, Chirenjeevi Krishnan, Tasmiat Rahman, Pavlos G. Lagoudakis, Ray-Hua Horng, Stuart A. Boden, Martin D. B. Charlton
Summary: This study successfully utilized perovskite quantum dots deposited on the window layer of GaAs thin-film solar cells to improve the external quantum efficiency across its entire absorption range. Luminescent downshifting and improved surface passivation of the window layer contributed to the enhancement of the internal quantum efficiency, leading to a doubling of EQE in the ultraviolet region of the solar spectrum.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2022)
Article
Multidisciplinary Sciences
Ivan Gnusov, Stella Harrison, Sergey Alyatkin, Kirill Sitnik, Julian Toepfer, Helgi Sigurdsson, Pavlos Lagoudakis
Summary: In this study, the rotating bucket experiment was realized for the optically trapped quantum fluid of light based on the exciton-polariton Bose-Einstein condensate in a semiconductor microcavity. The appearance of quantized vortices was observed, providing a means for fundamental studies of different superfluids.
Article
Engineering, Electrical & Electronic
Aram A. Mkrtchyan, Mikhail S. Mishevsky, Yuriy G. Gladush, Mikhail A. Melkumov, Aleksandr M. Khegai, Pavlos G. Lagoudakis, Albert G. Nasibulin
Summary: In this study, we investigate dispersion managed ultrashort-pulse generation in a Nd-doped polarization maintaining all-fiber laser operating at a wavelength of 920 nm. By using a linear laser scheme with chirped fiber Bragg grating (CFBG) and semiconductor saturable absorber mirror (SESAM), we achieve high order harmonic mode-locking and near-parabolic shape single pulse operation in the anomalous dispersion regime. Numerical simulations are used to optimize the laser resonator design and investigate intracavity pulse evolution.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Article
Polymer Science
Sultan Alhassan, Majed Alshammari, Khulaif Alshammari, Turki Alotaibi, Alhulw H. H. Alshammari, Yasir Fawaz, Taha Abdel Mohaymen Taha, Mohamed Henini
Summary: A synthesis technique for highly homogeneous PVDF-CaFe2O4 polymer films was developed from solution. XRD, FTIR, and ESEM experiments were conducted for structural characterizations. The addition of CaFe2O4 nanoparticles led to decreased direct and indirect band gap energies, increased refractive index, and improved nonlinear refractive index, making PVDF-CaFe2O4 nanocomposites promising for optoelectronic applications.
Article
Materials Science, Multidisciplinary
Aleksandr V. Averchenko, Igor A. Salimon, Ekaterina V. Zharkova, Svetlana Lipovskikh, Pavel Somov, Omar A. Abbas, Pavlos G. Lagoudakis, Sakellaris Mailis
Summary: By alloying, the optoelectronic properties of 2D-TMDC can be tailored, leading to enhanced photodetection performance. Seeking a scalable composition-controlled alloy preparation technology is essential.
MATERIALS TODAY ADVANCES
(2023)
Article
Physics, Applied
Denis Aristov, Stepan Baryshev, Julian D. Topfer, Helgi Sigurdsson, Pavlos G. Lagoudakis
Summary: We achieved all-optical planar microlensing for exciton-polariton condensates in semiconductor microcavities, and proposed a strategy to optimize the focusing of the condensate by studying the effects of pump intensity and geometry.
APPLIED PHYSICS LETTERS
(2023)
Article
Chemistry, Physical
Amra A. Alhassni, Jorlandio F. Felix, John Fredy R. Marroquin, Sultan Alhassan, Haifa Alghamdi, Amjad Almunyif, Walter M. de Azevedo, Juliana Lunz, Braulio S. Archanjo, Mohamed Henini
Summary: This work investigated the effect of gamma radiation on the structural and optical properties of diluted GaAs1_xBix epitaxial layers with different Bismuth contents. XRD, Raman spectroscopy, and photoluminescence measurements were used to examine the influence of radiation. The results showed that gamma radiation affected the optical properties of GaAs1_xBix epitaxial layers, leading to an increase in hole concentration and improvement in optical performance.
APPLIED SURFACE SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Kirsty E. McGhee, Michele Guizzardi, Rahul Jayaprakash, Kyriacos Georgiou, Till Jessewitsch, Ullrich Scherf, Giulio Cerullo, Anton Zasedatelev, Tersilla Virgili, Pavlos G. Lagoudakis, David G. Lidzey
Summary: This study proposes a new strategy for the ultrafast control of polariton resonances by modifying the optical cavity mode. The researchers successfully generated fully-reversible blueshifts of the lower polariton branch without reducing the exciton-photon coupling strength. This work has important applications in emerging computing technologies.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Yeongho Kim, Saud Alotaibi, Mohamed Henini, Byong Sun Chun, Sang Jun Lee
Summary: A mid-wavelength p-B-i-n infrared photodetector, consisting of ternary alloys of InAs0.9Sb0.1 and AlAs0.05Sb0.95, has been successfully operated at room temperature. The detector showed high crystalline quality and low defect density, as confirmed by high-resolution x-ray diffraction analysis. The dark current behavior and deep-level traps in the detector structure were investigated, revealing diffusion-limited current and two shallow traps in the InAsSb absorber. The detector exhibited good performance in terms of cutoff wavelength, current responsivity, and dark current density, providing high specific detectivity.
Article
Physics, Multidisciplinary
S. L. Harrison, H. Sigurdsson, P. G. Lagoudakis
Summary: This paper theoretically implements a strategy to simulate Stuart-Landau oscillator dynamics in all-to-all connected networks using quantum computation architectures. The technique involves a triad structure minor embedding to transform dense graphs into sparse ones, and can potentially be realized in future solid-state technologies. As a case study, the minor embedding procedure is shown to enable simulation of the XY model on complete graphs, overcoming geometric constraints.
PHYSICAL REVIEW RESEARCH
(2023)
Article
Materials Science, Multidisciplinary
Dmitriy Dovzhenko, Denis Aristov, Lucinda Pickup, Helgi Sigurosson, Pavlos Lagoudakis
Summary: We experimentally observed the next-nearest-neighbor coupling between ballistically expanding spinor exciton-polariton condensates in a planar semiconductor microcavity. We demonstrated all-optical control over the coupling strength between neighboring condensates by distance-periodic pseudospin screening. By screening the nearest-neighbor coupling, we overcame the conventional spatial coupling hierarchy between condensates.
Correction
Physics, Applied
Alexey Kavokin, Timothy C. H. Liew, Christian Schneider, Pavlos G. Lagoudakis, Sebastian Klembt, Sven Hoefling
NATURE REVIEWS PHYSICS
(2022)
Review
Physics, Applied
Alexey Kavokin, Timothy C. H. Liew, Christian Schneider, Pavlos G. Lagoudakis, Sebastian Klembt, Sven Hoefling
Summary: Polariton lasers emit coherent monochromatic light through a spontaneous emission process and show properties of Bose-Einstein condensation and superfluidity at room temperature. Emerging material systems for polariton lasers include organic molecules, transition metal dichalcogenides, perovskites, and liquid-crystal microcavities, which have potential applications in topological lasing, classical neuromorphic computing, and quantum information processing. Polaritonics, the study of strongly coupled light-matter states, offers advantages in classical and quantum information processing with full optical control and read-out capabilities.
NATURE REVIEWS PHYSICS
(2022)
