Article
Chemistry, Multidisciplinary
B. Kumaar Swamy Reddy, Sushmitha Veeralingam, Pramod H. Borse, Sushmee Badhulika
Summary: This research demonstrates a broadband photodetector based on a hybrid organic-inorganic heterojunction, showing fast response times and superior responsivities in the UV, visible, and NIR spectra. By enhancing the interfacial area between SnSe2 and PEDOT:PSS, efficient electron-hole pair separation is achieved, leading to the high responsivity of the photodetector.
MATERIALS CHEMISTRY FRONTIERS
(2022)
Article
Chemistry, Physical
Daxin Zhang, Shuo Yang, Wenshi Zhao, Lili Yang, Yang Liu, Maobin Wei, Lei Chen, Jinghai Yang
Summary: In this study, electrical properties of BHJs formed by regioregular poly(3-hexylthiophene) (P3HT) and the soluble fullerene derivative [6,6]-phenyl-C-61-butyric acid methyl ester (PCBM) were investigated using Raman spectroscopy. The study observed a return-back shift in the Raman signal, possibly indicating charge transfer and significant changes in resistivity. Additionally, a correlation between frequency shift and resistivity was established, highlighting the potential of Raman technique in analyzing electrical properties and characterizing battery performance.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Chemistry, Physical
Y. S. Lau, Z. Lan, L. Cai, F. Zhu
Summary: The photoresponse of transparent self-powered near-infrared organic photodetectors with a high-conductivity polymer electrode was analyzed. The detectors showed high detectivity, cutoff frequency, and linear dynamic range, comparable to traditional opaque detectors.
MATERIALS TODAY ENERGY
(2021)
Article
Nanoscience & Nanotechnology
Enoch Go, Hyunjung Jin, Seongwon Yoon, Sungmin Park, So Hyun Park, Hyeonggeun Yu, Hae Jung Son
Summary: Organic infrared materials have high absorption coefficients and adjustable absorption spectrum. In organic photodetectors, achieving a high signal-to-noise ratio in the near-infrared spectrum is often challenging. This study investigates the origin of dark currents in near-infrared organic photodetectors and reveals strategies to improve detectivity through donor-acceptor blending morphology and the effects of carrier injection from outer electrodes.
Article
Engineering, Electrical & Electronic
Kishan Lal Kumawat, Deependra Kumar Singh, Karuna Kar Nanda, Saluru Baba Krupanidhi
Summary: Metal dichalcogenide semiconductors have shown great performance in various optoelectronic applications, but low carrier mobility has restricted their use in highly responsive photodetectors. By incorporating SnSe2 with reduced graphene oxide (RGO) to form a SnSe2-RGO bulk heterojunction and depositing it on a MoS2 film, a self-powered photodetector with excellent performance was achieved.
ACS APPLIED ELECTRONIC MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Ling Hong, Huifeng Yao, Yong Cui, Pengqing Bi, Tao Zhang, Yongxin Cheng, Yunfei Zu, Jinzhao Qin, Runnan Yu, Ziyi Ge, Jianhui Hou
Summary: Establishing an ideal architecture with selective carrier transport and suppressed recombination is crucial for improving photovoltaic efficiency in organic solar cells (OSCs). By tailoring a hybrid planar/bulk structure, highly efficient OSCs with reduced energy losses were fabricated. The study highlights the potential of precisely regulating the structure of donor:acceptor heterojunction to further enhance the efficiencies of OSCs.
ADVANCED MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Xuan Wang, Yehua Tang, Wanping Wang, Hao Zhao, Yanling Song, Chaoyang Kang, Kefan Wang
Summary: In this study, Bi2Se3 film was deposited onto silicon nanowires using vacuum evaporation method to create a bulk heterojunction, resulting in a self-powered photodetector with a wide detection range and fast response speed. This silicon-based photodetector shows promise for near- and mid-infrared applications, making it a potential candidate for future optoelectronic devices.
Article
Nanoscience & Nanotechnology
Jianfei Huang, Hoang Mai Luong, Jaewon Lee, Sangmin Chae, Ahra Yi, Zhong-Ze Qu, Zhifang Du, Dylan G. Choi, Hyo Jung Kim, Thuc-Quyen Nguyen
Summary: Organic photodetectors processed with environmentally benign solvent o-xylene exhibit broad activity. The devices, using PBDB-T polymer donor and CO1-4F non-fullerene acceptor, are dissolved in o-xylene at controlled temperature. The o-xylene processed devices show an external quantum efficiency up to 70%, surpassing chlorobenzene processed counterparts, and have characteristics of suppressed dark current and high specific detectivity within practical operation frequencies.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Dewu Yue, Xin Ju, Tao Hu, Ximing Rong, Xinke Liu, Xiao Liu, Hong Kuan Ng, Dongzhi Chi, Xinzhong Wang, Jing Wu
Summary: A lateral 2D WSe2 p-n homojunction with low contact resistance and high photoresponsivity was constructed using a plasma-treated doping method.
Article
Materials Science, Multidisciplinary
Zesheng Lv, Supeng Zhang, Gang Wang, Hao Jiang
Summary: With the emergence of new applications such as underwater optical communication, the demand for photodetectors with specific characteristics is increasing. However, the complexity of device structure and process makes most gain-type photodetectors based on less-mature materials unsuitable for practical applications despite their high performance. Therefore, a simple InGaN/GaN phototransducer is proposed for high-performance visible-light photodetection.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Energy & Fuels
Christina Harreiss, Stefan Langner, Mingjian Wu, Marvin Berlinghof, Stefanie Rechberger, Johannes Will, Michele Conroy, Ursel Bangert, Tobias Unruh, Christoph J. Brabec, Erdmann Spiecker
Summary: This study investigates the influence of solvent vapor annealing on nanomorphology, crystallinity, and performance by utilizing advanced transmission electron microscopy methods. The results show that the choice of solvent significantly affects the establishment rate of device efficiency, while the donor solubility controls the diffusion and crystallization kinetics of the blend molecules. Additionally, the domain size and single-crystalline nature of DRCN5T fibers are found to be crucial for achieving the highest efficiency.
Article
Materials Science, Multidisciplinary
Jie Zhang, Fengjing Liu, Dong Liu, Yanxue Yin, Mingxu Wang, Zixu Sa, Li Sun, Xiaoxin Zheng, Xinming Zhuang, Zengtao Lv, Wenxiang Mu, Zhitai Jia, Yang Tan, Feng Chen, Zai-xing Yang
Summary: The study investigates the photodetection performance of thin amorphous Ga2O3 nanosheet, which has been widely used as dielectric and passivation materials. By peeling off from the Ga solid-melt surface, the amorphous Ga2O3 nanosheet is confirmed to have an amorphous characteristic through selected area electron diffraction and X-ray diffraction. However, due to limited absorption ability and abundant defect states, the amorphous Ga2O3 nanosheet shows low photocurrent and slow response time even at a bias voltage. To enhance the photodetection performance, PbI2 nanosheet is grown on the surface of the amorphous Ga2O3 nanosheet, forming a Ga2O3/PbI2 heterojunction photodetector. The heterojunction photodetector exhibits larger photocurrent (1.6 nA) and faster response times (2 ms rise time and 3 ms decay time) even at a zero bias voltage, and it also shows excellent self-powered photoresponse characteristic and mechanical flexibility when configured into a flexible photodetector. This work provides a pathway for the development of high-performance flexible optoelectronic devices.
MATERIALS TODAY PHYSICS
(2023)
Article
Engineering, Multidisciplinary
Shan Li, Zeng Liu, Maolin Zhang, Lili Yang, Yufeng Guo, Weihua Tang
Summary: This paper presents a self-powered ultraviolet photodetector with high performance at zero bias by constructing a hybrid heterojunction of n-type GaN film and p-type PEDOT:PSS material. The device exhibits excellent self-powered photoelectrical properties in dual-band and achieves outstanding photodetection performance parameters with high reliability.
SCIENCE CHINA-TECHNOLOGICAL SCIENCES
(2023)
Article
Materials Science, Multidisciplinary
Yanru Xie, Yicun Yao, Dong Zhang, Hefu Li, Qingru Wang, Liqiang Zhang
Summary: The study successfully fabricated a TiO2/PFO heterojunction photodetector, showing a peak photocurrent response of 0.32 mA W-1 at 410 nm with rapid, repeatable, and consistent characteristics. Under weak blue light irradiance, the device exhibited short rise and decay times. This indicates that the TiO2/PFO heterojunction holds promise for developing self-powered blue light photodetectors with high spectral selectivity.
MATERIALS RESEARCH EXPRESS
(2021)
Article
Materials Science, Multidisciplinary
Alaa Y. Y. Ali, Natalie P. P. Holmes, Nathan Cooling, John Holdsworth, Warwick Belcher, Paul Dastoor, Xiaojing Zhou
Summary: The performance of P3HT:PCBM organic photovoltaic devices is influenced by environmental conditions, thermal annealing, and material blend composition. Optimized laboratory fabricated devices show that humidity during fabrication can cause electrode oxidation and photo-oxidation, while thermal annealing can enhance device performance by modifying the morphology of the active layer. Additionally, the choice of PEDOT:PSS material affects the performance of P3HT:PCBM devices.
Article
Materials Science, Multidisciplinary
Luigi Salamandra, Luca La Notte, Claudio Fazolo, Melania Di Natali, Stefano Penna, Leonardo Mattiello, Lucio Cina, Roberto Del Duca, Andrea Reale
ORGANIC ELECTRONICS
(2020)
Article
Chemistry, Physical
Saeed Mardi, Marialilia Pea, Andrea Notargiacomo, Narges Yaghoobi Nia, Aldo Di Carlo, Andrea Reale
Article
Chemistry, Multidisciplinary
Saeed Mardi, Khabib Yusupov, Patricia M. Martinez, Anvar Zakhidov, Alberto Vomiero, Andrea Reale
Summary: Carbon nanotube/polymer composites are being widely studied for their potential applications in thermoelectric devices. By introducing carbon nanotube forests and additives to a P3HT film, a significant enhancement in thermoelectric performance was achieved, with values of Seebeck coefficient, electrical conductivity, and power factor reaching up to 92 mu V/K, 130 S/cm, and 110 mu W/m K-2, respectively, at a temperature of 344.15 K. The improved thermoelectric performance is attributed to the increased electrical conductivity and enhanced Seebeck coefficient provided by the carbon nanotube forests and additives, respectively.
Article
Nanoscience & Nanotechnology
Saeed Mardi, Dan Zhao, Nara Kim, Ioannis Petsagkourakis, Klas Tybrandt, Andrea Reale, Xavier Crispin
Summary: Research has found that the composition of different PEDOT electrodes significantly affects the thermo-induced voltage coefficient of iTE devices. The polymer in the electrode causes ion concentration differences at the electrode/electrolyte interface, contributing to a temperature-dependent interfacial potential drop.
ADVANCED ELECTRONIC MATERIALS
(2021)
Article
Energy & Fuels
Bruno Lorenzi, Paolo Mariani, Andrea Reale, Aldo Di Carlo, Gang Chen, Dario Narducci
Summary: A study reported the modeling and development of customized thermoelectric generators, optimized to be hybridized with amorphous silicon, Gallium Indium Phosphide, or Perovskites solar cells. Experimental validation demonstrated efficiency gains in Perovskites solar cells at typical operating temperatures. This study accurately showcased the real potential of thermoelectric hybridization of solar cells.
Article
Physics, Applied
Saeed Mardi, Pietro Cataldi, Athanassia Athanassiou, Andrea Reale
Summary: Paper-based organic thermoelectric materials were developed using PEDOT:PSS, GNPs, and a starch-based biopolymer. The addition of an ionic liquid to the PEDOT:PSS solution further enhanced the material's properties, while the incorporation of GNPs improved the Seebeck coefficient. Additionally, these composites exhibited excellent flexibility and environmental stability.
APPLIED PHYSICS LETTERS
(2022)
Article
Energy & Fuels
Jessica Barichello, Luigi Vesce, Paolo Mariani, Enrico Leonardi, Roberto Braglia, Aldo Di Carlo, Antonella Canini, Andrea Reale
Summary: The Dye-sensitized solar cells (DSSCs) technology, featuring low cost, easy fabrication, good response to diffuse light and color tunability, is suitable for application in the agrovoltaic field. By testing 40 DSSC Z-series connected modules, it was found that they exhibit high conversion efficiency, transparency and robustness when used in a greenhouse setting.
Article
Chemistry, Multidisciplinary
Jessica Barichello, Paolo Mariani, Fabio Matteocci, Luigi Vesce, Andrea Reale, Aldo Di Carlo, Maurizio Lanza, Gaetano Di Marco, Stefano Polizzi, Giuseppe Calogero
Summary: The efficiency of dye-sensitized solar cells can be improved by embedding gold nanoparticles in the TiO2 layer and adding a scattering layer. Experiments were conducted using both organic and natural dyes, and the results showed that natural dyes had higher conversion efficiency.
Article
Polymer Science
Martina Dianetti, Gianpaolo Susanna, Emanuele Calabro, Giuseppina Polino, Martin Otto, Daniel Neumaier, Andrea Reale, Francesca Brunetti
Summary: In this work, bulk-heterojunction solar cells on monolayer graphene with nickel-grids as semitransparent conductive electrodes were fabricated and characterized. The electrodes exhibited high transmittance and low sheet resistance, enabling the production of efficient solar cells. The study also found that blending graphene with photovoltaic materials can further improve the performance of the cells.
Article
Chemistry, Multidisciplinary
Saeed Mardi, Dan Zhao, Klas Tybrandt, Andrea Reale, Xavier Crispin
Summary: This study demonstrates that the electrode used in an ionic thermoelectric supercapacitor (ITESC) is critical both for energy storage and for determining the effective thermopower. It is shown that different electrode materials can lead to positive or negative thermopower. Furthermore, the study concludes that PEDOT:PSS electrodes are superior to AuNWs electrodes in terms of thermovoltage, capacitance, and charge retention performance. Additionally, a new strategy of constructing an ionic thermopile is achieved by series-connecting different legs with the same electrolyte but different electrodes, resulting in enhanced thermoelectric effect in ITESCs.
ADVANCED MATERIALS INTERFACES
(2022)
Proceedings Paper
Engineering, Electrical & Electronic
R. Giofre, P. Colantonio, M. Auf der Maur, A. Reale
Summary: This paper describes the activities carried out to assess the thermal behavior of a Gallium Nitride (GaN) power bar grown on Silicon Carbide (SiC) substrate. The aim is to set up a reliable approach to extract an accurate value of the device thermal resistance (Rth), under different base-plate temperatures and dissipated power values. The comparisons between measured and simulated values have confirmed that both RS and PC techniques can be applied to experimentally verify the simulation's assumptions.
2020 15TH EUROPEAN MICROWAVE INTEGRATED CIRCUITS CONFERENCE (EUMIC)
(2021)
Article
Energy & Fuels
Luca La Notte, Lorena Giordano, Emanuele Calabro, Roberto Bedini, Giuseppe Colla, Giovanni Puglisi, Andrea Reale
Proceedings Paper
Optics
Chiara Lodovisi, Silvello Betti, Andrea Reale, Luigi Salamandra
PROCEEDINGS OF THE 8TH INTERNATIONAL CONFERENCE ON PHOTONICS, OPTICS AND LASER TECHNOLOGY (PHOTOPTICS)
(2020)
