James C. Blakesley
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View article: Results of an International Comparison of Indoor Photovoltaic Measurements Among Seven Metrological Institutes
Results of an International Comparison of Indoor Photovoltaic Measurements Among Seven Metrological Institutes Open
This study presents results of an intercomparison of indoor photovoltaics (PVs) among seven metrological institutes. Three types of solar cells were measured; organic and amorphous silicon cells representing current indoor products in the …
View article: Back-Contact Perovskite Solar Cell Modules Fabricated via Roll-to-Roll Slot-Die Coating: Scale-Up toward Manufacturing
Back-Contact Perovskite Solar Cell Modules Fabricated via Roll-to-Roll Slot-Die Coating: Scale-Up toward Manufacturing Open
We fabricate a type of back-contact perovskite solar cell based on 1.5 μm-width grooves that are embossed into a plastic film whose opposing "walls" are selectively coated with either n- or p-type contacts. A perovskite precursor solution …
View article: Roadmap on established and emerging photovoltaics for sustainable energy conversion
Roadmap on established and emerging photovoltaics for sustainable energy conversion Open
Photovoltaics (PVs) are a critical technology for curbing growing levels of anthropogenic greenhouse gas emissions, and meeting increases in future demand for low-carbon electricity. In order to fulfill ambitions for net-zero carbon dioxid…
View article: Performance measurements for indoor photovoltaic devices: Classification of a novel light source
Performance measurements for indoor photovoltaic devices: Classification of a novel light source Open
There is an increasing interest in using indoor photovoltaic (IPV) devices to power Internet of Things applications, low power communications, and indoor environmental sensing. For the commercialization of IPV technologies, device performa…
View article: Sourcing albedo data for bifacial PV systems in complex landscapes
Sourcing albedo data for bifacial PV systems in complex landscapes Open
Bifacial photovoltaic (PV) systems harvest additional light reflected from the ground. The proportion of light reflected from the ground (albedo) is a critical parameter in estimating the expected performance of these systems. It is import…
View article: Roadmap on Photovoltaic Absorber Materials for Sustainable Energy Conversion
Roadmap on Photovoltaic Absorber Materials for Sustainable Energy Conversion Open
Photovoltaics (PVs) are a critical technology for curbing growing levels of anthropogenic greenhouse gas emissions, and meeting increases in future demand for low-carbon electricity. In order to fulfil ambitions for net-zero carbon dioxide…
View article: Investigating spatial macroscopic metastability of perovskite solar cells with voltage dependent photoluminescence imaging
Investigating spatial macroscopic metastability of perovskite solar cells with voltage dependent photoluminescence imaging Open
Metastability is a characteristic feature of perovskite solar cell (PSC) devices that affects power rating measurements and general electrical behaviour. In this work the metastability of different types of PSC devices is investigated thro…
View article: D5.0 - Compressed Sensing Spectral Photoluminescence Imaging of Wide Bandgap Semiconductor Materials for Power Electronics Applications
D5.0 - Compressed Sensing Spectral Photoluminescence Imaging of Wide Bandgap Semiconductor Materials for Power Electronics Applications Open
View article: PV module energy rating standard IEC 61853-3 intercomparison and best practice guidelines for implementation and validation
PV module energy rating standard IEC 61853-3 intercomparison and best practice guidelines for implementation and validation Open
The IEC 61853 standard series aims to provide a standardized measure for PV module energy rating, namely the Climate Specific Energy Rating (CSER). For this purpose, it defines procedures for the experimental determination of input data an…
View article: PV module energy rating standard IEC 61853-3 intercomparison and best practice guidelines for implementation and validation
PV module energy rating standard IEC 61853-3 intercomparison and best practice guidelines for implementation and validation Open
The IEC 61853 standard series aims to provide a standardized measure for PV module energy rating, namely the Climate Specific Energy Rating (CSER). For this purpose, it defines procedures for the experimental determination of input data an…
View article: Data from PV module energy rating standard IEC 61853-3 intercomparison
Data from PV module energy rating standard IEC 61853-3 intercomparison Open
This is the data from PV module energy rating standard IEC 61853-3 intercomparison. Details can be found in: M. R. Vogt, S. Riechelmann, A. M. Gracia-Amillo, A. Driesse, A. Kokka, K. Maham, P. Kärhä, R. Kenny, C. Schinke, K. Bothe, J. C. B…
View article: Data from PV module energy rating standard IEC 61853-3 intercomparison
Data from PV module energy rating standard IEC 61853-3 intercomparison Open
This is the data from PV module energy rating standard IEC 61853-3 intercomparison. Details can be found in: M. R. Vogt, S. Riechelmann, A. M. Gracia-Amillo, A. Driesse, A. Kokka, K. Maham, P. Kärhä, R. Kenny, C. Schinke, K. Bothe, J. C. B…
View article: Author Correction: Enhancing and quantifying spatial homogeneity in monolayer WS2
Author Correction: Enhancing and quantifying spatial homogeneity in monolayer WS2 Open
View article: Enhancing and quantifying spatial homogeneity in monolayer WS2
Enhancing and quantifying spatial homogeneity in monolayer WS2 Open
View article: High-resolution linearity measurements of photovoltaic devices using digital light processing projection
High-resolution linearity measurements of photovoltaic devices using digital light processing projection Open
Although photovoltaic (PV) devices are rated at standard testing conditions (STCs), these STCs are rarely met, either outdoors, or when PV devices are used for indoor applications. Thus, it is beneficial to fully characterise the linearity…
View article: Accuracy, cost and sensitivity analysis of PV energy rating
Accuracy, cost and sensitivity analysis of PV energy rating Open
We present an analysis of the accuracy and cost of energy rating of photovoltaic modules. We identify the prominent sources of uncertainty and demonstrate that good estimates of energy rating can be made with a reduced set of measurements,…
View article: Results of the Bifacial PV Cells and PV Modules Power Measurement Round Robin Activity of the PV-Enerate Project
Results of the Bifacial PV Cells and PV Modules Power Measurement Round Robin Activity of the PV-Enerate Project Open
Bifacial Photovoltaic (PV) technology is expected to acquire an increased market share of the solar PV industry in the future, due to the ability of bifacial PV modules to collect light from both the front and rear side, increasing the ene…
View article: Effective Spectral Albedo from Satellite Data for Bifacial Gain Calculations of PV Systems
Effective Spectral Albedo from Satellite Data for Bifacial Gain Calculations of PV Systems Open
A key requirement for increasing the accuracy of energy yield modelling is the accurate estimation of the ground albedo value of a potential site. As most natural surfaces are not white, the colour as well as irradiance of reflected light …
View article: Interlaboratory Comparison of the PV Module Energy Rating Standard IEC 61853-3
Interlaboratory Comparison of the PV Module Energy Rating Standard IEC 61853-3 Open
The IEC 61853 standard series “Photovoltaic (PV) module performance testing and energy rating” aims to provide a standardized measure for PV module performance, namely the Climate Specific Energy Rating (CSER). An algorithm to calculate CS…
View article: Signal Amplification Gains of Compressive Sampling for Photocurrent Response Mapping of Optoelectronic Devices
Signal Amplification Gains of Compressive Sampling for Photocurrent Response Mapping of Optoelectronic Devices Open
Spatial characterisation methods for photodetectors and other optoelectronic devices are necessary for determining local performance, as well as detecting local defects and the non-uniformities of devices. Light beam induced current measur…
View article: <i>In situ</i> contactless thermal characterisation and imaging of encapsulated photovoltaic devices using phosphor thermometry
<i>In situ</i> contactless thermal characterisation and imaging of encapsulated photovoltaic devices using phosphor thermometry Open
Accurate temperature measurements of a photovoltaic (PV) device are not always straightforward. Compromises between accuracy and spatial resolution often have to be made to give either quantitative single point measurements or qualitative …
View article: High-speed digital light source photocurrent mapping system
High-speed digital light source photocurrent mapping system Open
High-resolution spatial characterization of photovoltaic devices and photodetectors can reveal local defects that can have a detrimental impact on the lifetime and performance of such devices. Photocurrent mapping methods can provide high-…
View article: Nanoscale 3D characterisation of soft organic material using conductive scanning probe tomography
Nanoscale 3D characterisation of soft organic material using conductive scanning probe tomography Open
The 3D nanostructure of organic materials plays a key role in their performance in a broad range of fields, from life sciences to electronics. However, characterising the functionality of their morphologies presents a critical challenge re…
View article: Energy Rating for Evaluating Performance of Perovskite and Perovskite-on-Silicon Tandem Devices in Real-World Conditions
Energy Rating for Evaluating Performance of Perovskite and Perovskite-on-Silicon Tandem Devices in Real-World Conditions Open
We present an independent analysis of expected real-world performance of single junction perovskite cells and tandem perovskite-on-silicon devices relative to single junction silicon cells. As energy-rating of perovskite devices is not yet…
View article: Compact multifunctional source-meter system for characterisation of laboratory-scale solar cell devices
Compact multifunctional source-meter system for characterisation of laboratory-scale solar cell devices Open
This article presents an innovative and low-cost solution for optimizing the acquisition of performance data of small-laboratory-scale photovoltaic devices. A novel measuring setup is proposed, designed based on an Arduino microcontroller …
View article: Assessing the Validity of Transient Photovoltage Measurements and Analysis for Organic Solar Cells
Assessing the Validity of Transient Photovoltage Measurements and Analysis for Organic Solar Cells Open
Transient photovoltage measurements are widely used to characterize organic solar cells, but the validity of this method has been established only in a limited range of cases. The authors simulate these measurements over a broad range of c…
View article: Analysing impact of oxygen and water exposure on roll-coated organic solar cell performance using impedance spectroscopy
Analysing impact of oxygen and water exposure on roll-coated organic solar cell performance using impedance spectroscopy Open
View article: Precise Characterisation of Molecular Orientation in a Single Crystal Field-Effect Transistor Using Polarised Raman Spectroscopy
Precise Characterisation of Molecular Orientation in a Single Crystal Field-Effect Transistor Using Polarised Raman Spectroscopy Open
Charge transport in organic semiconductors is strongly dependent on the molecular orientation and packing, such that manipulation of this molecular packing is a proven technique for enhancing the charge mobility in organic transistors. How…