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In this study, the importance of incorporation of solution processed graphene as an electron transport layer (ETL) in bulk heterojunction (BHJ) devices is elucidated by measuring the current-voltage characteristics under da. Cite Download full-text Context in source publication Context 1. The molecular structural analysis was recorded with the help of Thermo Scientific DXRxi Raman imaging microscope. I- V characteristics of the devices were measured using 2612A Keithley source meter coupled with a manual probe. View in full-text Citations. Responsivity (R) was calculated using the expression R. Surface morphology studies revealed that perovskite thin films grown by OSSC exhibited large density of pinWhile, the film produced by TSSC shows full surface coverage withHowever, it can be utilized as HTLs by forming a composite structure with other HTLs such as PEDOT:PSS, MoO3, and WO3.. Recent Progress in Carbon-Based Buffer Layers for Polymer Solar Cells Article Full-text available Nov 2019 Thang Phan Nguyen Dang Le Tri Nguyen Van-Huy Nguyen Thu-Ha Le Quyet Van Le Carbon-based materials are promising candidates as charge transport layers in various optoelectronic devices and have been applied to enhance the performance and stability of such devices. In this paper, we provide an overview of the most contemporary strategies that use carbon-based materials including graphene, graphene oxide, carbon nanotubes, carbon quantum dots, and graphitic carbon nitride as buffer layers in polymer solar cells (PSCs). The crucial parameters that regulate the performance of carbon-based buffer layers are highlighted and discussed in detail. Finally, we elaborate on the remaining challenges and future directions for the development of carbon-based buffer layers to achieve high-efficiency and high-stability PSCs. View Analysis of perovskite based Schottky photodiode Conference Paper Apr 2019 Aditi Upadhyaya Chandra Mohan Singh Negi Anjali Yadav Saral K.http://www.cargoaircon.ru/userfiles/walking-in-umbria-cicerone-guides.xml
Gupta Ajay Singh Verma In this paper, a perovskite based Schottky photodiode was fabricated by sandwiching the perovskite layer between Indium tin oxide (ITO) and aluminum (Al) electrode. Field emission scanning electron microscope (FESEM) image of the perovskite thin film reveal uniform deposition of perovskite over the entire glass substrate. The measured Current-voltage characteristics of Schottky photodiode display rectifying behavior under dark condition. The reverse current level of the photodiode gets increased under illumination by green laser. The important diode parameters, such as ideality factor and barrier height was determined from the thermionic emission theory. The ideality factor under dark condition was 1.35, and increased to 6.29 under illumination condition. The charge transport mechanism of the photodiode was examined according the space charge limited conduction (SCLC) theory. The MWCNTs have been decorated with silver nanoparticles (NPs) via silver nitrate solution. Field emission scanning electron microscope (FESEM) results are in favor of the required conformation of Ag NPs on to the side walls of MWCNTs. The presence of Ag NPs in the composite has also been verified through X-Ray diffraction (XRD). The charge transport mechanism is explained by double logarithmic I-V curve, which show two distinct mechanisms: Ohmic conduction at low voltage and trap limited space charge conduction (TCLC) at large applied voltages. The photovoltaic properties of OSC were examined through the analysis of various photovoltaic parameters, which includes the external quantum efficiency, short circuit current density (Jsc), and open circuit voltage (Voc). The inverted structured OSC device showed the efficiency of 5.87 %. The achieved efficiency can be attributed to the better light harvesting capability, improved interfacial properties and improved charge collection efficiency.
The AC impedance technique was employed to extract internal parameters of the fabricated devices. The obtained impedance curves evidently exhibit high-quality correlation between the obtained data and the curve fitting data. An approach to solving these issues is to introduce graphene and its derivatives into the photoactive layer of solar cells. These materials have record high charge carrier mobility at normal temperatures and low absorption cross-sections of solar radiation. The review considers chemical materials science methods and nanotechnology approaches to the design of 2D hybrid structures based on graphene and quantum dots. Examples of their most successful use in solar cells are given and promising areas of research and development in this field are formulated. The bibliography includes 173 references. View Solution processed flexible photodiode based on poly(3-hexylthiophene):graphene composite Conference Paper Jul 2019 Anjali Yadav Aditi Upadhyaya Saral K. Gupta Ajay Singh Verma Chandra Mohan Singh Negi The polymer-carbon nanocomposites have achieved a remarkable progress over the past years. Their unique electrical and optical properties have attracted the attention for photovoltaic and optoelectronic devices. The measured current-voltage (I-V) characteristics of the fabricated device under dark condition were found to be similar to the Schottky diode. Various crucial diode parameters, such as ideality factor, barrier height, series resistance etc., have been estimated in the backdrop of Shockley model. The double logarithmic J-V characteristic analysis was carried out to determine the charge transport properties. View Comparative study of P3HT: Graphene nanocomposite based device on flexible PET and glass substrate Conference Paper Aug 2019 Anjali Yadav Aditi Upadhyaya Saral K.
Gupta Ajay Singh Verma Chandra Mohan Singh Negi The flexible substrates are beneficial to manufacture devices with the features including, light weight, economic, and conformability to any surface. However, it is a key challenge to fabricate the composite based devices over flexible substrates of performance similar to the rigid devices. The measured current-voltage (I-V) characteristics of the fabricated devices on both the PET and glass substrate under dark condition have found to be similar to the Schottky diode. Various essential diode parameters, such as, barrier height, ideality factor, series resistance have been estimated. The flexible device show relatively large photocurrent and small dark current over the measurement range compare to the device over hard substrate that might results from the better interface properties. This indicates the enormous potential of flexible devices for many imperative future applications. Keep me logged in Log in or Continue with LinkedIn Continue with Google Welcome back. Keep me logged in Log in or Continue with LinkedIn Continue with Google No account. All rights reserved. Terms Privacy Copyright Imprint. I didn't wrote much in this forum, but read in it almost every day. I will start with the GPIB-card: It is cheaper then the NI-cards, but I had much fun with the driver. At the end I formated the harddisk and started with a brand new system. For this card you need the NI-VISA driver and the Keithley card driver. As long as you only use VISA commands it works. I not shure what went wrong the first Time I inastalled the card but on the new system it works. LabView works, GPIB works. The next part (I need more posts) will be about the communication between the computer and the Keithely 2612. Don't remember now (its been about 10 yrs since I used one).Something about replacing a tulip dll with the NI version and everything is fine.Shure this was the clou why I need the GPIB card.
After that the communication worked, but only in one direction. The instrument starts a messurement but I also liked to know when the meassurement is done. Here you can read about it: Paste as plain text instead Display as a link instead Clear editor Upload or insert images from URL. Base commands replicate the functionalityPython. See the Keithley 2600 reference manual To enable command checking, set the keyword argument argumentThis is done by reading the. Keithley's error queue after every command and will therefore result in significantNot supported are: We implement our own in the Keithley2600 class. Currently, this is only:The higher level commands transferMeasurement andResultTable stores the measurementIt also provides a dictionary-like interface to access columns by name, methods to loadYou can select a specific backend by giving its path to the Keithley2600 constructor. For example: If you pass an empty string, keithley2600 will usePyVISA-py otherwise. Reload to refresh your session. Reload to refresh your session. You can use MATLAB together with Instrument Control Toolbox as your single software environment to configure, control, acquire, and analyze data from Keithley instruments. You can also create graphical interfaces for collecting and analyzing your data and automating tests. Keithley provides MATLAB instrument drivers that use the IVI specification for the following instruments: Keithley 2910 and 2920 Vector Signal Generators, 2810 and 2820 Vector Signal Analyzers, and 3706 System Switch. Learn more about Using MATLAB Software with Keithley Instruments through IVI Instrument Drivers. To request support for a specific instrument, include the instrument's name and model number. See our privacy policy for details. See our privacy policy for details. Other MathWorks country. You must separately download and install certain libraries in order to use this software. These libraries are available for free from National Instruments.
For commercial license, please contact me. Self-extracting installers are provided (7-Zip SFX). They should be available for free from National Instruments.