Michael Corazza

Michael Corazza
Technical University of Denmark | DTU · Department of Energy Conversion and Storage

MS Electronic Engineering

About

29
Publications
7,659
Reads
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894
Citations
Citations since 2017
5 Research Items
703 Citations
2017201820192020202120222023020406080100120140
2017201820192020202120222023020406080100120140
2017201820192020202120222023020406080100120140
2017201820192020202120222023020406080100120140
Additional affiliations
May 2013 - present
Technical University of Denmark
Position
  • PhD Student
Education
May 2013 - May 2016
Technical University of Denmark
Field of study
  • Material science
September 2007 - April 2013
University of Padova
Field of study
  • Engineering

Publications

Publications (29)
Article
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 and low-cost components, coupled with open source hardware and software. The manuscript describes in detail the...
Article
We present the first comparative in situ small and wide angle X-ray scattering study of two polymers that are relevant for organic photovoltaics, during coating on a flexible substrate. From the obtained measurements we identified several differences between the drying of the two polymers. The polymer optimized for roll-to-roll coating attained its...
Article
As Organic Photovoltaic (OPV) development matures, the demand grows for rapid characterisation of degradation and application of Quantitative Accelerated Life Tests (QALT) models to predict and improve reliability. To date, most accelerated testing on OPVs has been conducted using ISOS consensus standards. This paper identifies some of the problems...
Article
This review summarizes the recent progress in the stability and lifetime of organic photovoltaics (OPVs). In particular, recently proposed solutions to failure mechanisms in different layers of the device stack are discussed comprising both structural and chemical modifications. Upscaling is additionally discussed from the perspective of stability...
Article
We investigated the response of roll coated organic solar cells at different bias voltages and illumination levels to implement a detailed impedance model. The technique used for the investigation is based on the combination of standard DC characterization with the impedance spectroscopy at different bias and illumination intensity conditions. We a...
Article
Full-text available
We developed an improved model to fit the photocurrent density versus voltage in organic solar cells. The model has been validated by fitting data from P3HT:PCBM solar cells. Our model quantitatively accounts for the band bending near the electrodes caused by charge accumulation in the active layer. The model explains the position of the built-in a...
Article
We performed a constant current stress at forward bias on organic heterojunction solar cells. We measured current voltage curves in both dark and light at each stress step to calculate the photocurrent. An existing model applied to photocurrent experimental data allows the estimation of several parameters such as generation, recombination, dissocia...
Article
We present results from an installation of fully roll-to-roll printed and coated polymer solar cell modules in a greenhouse environment over the course of roughly 2 years (650 days). We explored two different device architectures based on either fully carbon-based electrodes or silver nanowire (AgNW)-based electrodes and two different barrier mater...
Article
The process of accurately gauging lifetime improvements in organic photovoltaics (OPVs) or other similar emerging technologies, such as perovskites solar cells is still a major challenge. The presented work is part of a larger effort of developing a worldwide database of lifetimes that can help establishing reference baselines of stability performa...
Thesis
Full-text available
Renewable energies are a critical and necessary technological development deeply connected to human evolution and even survival. The extraordinary technological development of the past century brought tremendous changes to the planet which, despite the scepticism of some, are indubitably affecting the natural ecosystem and maybe even the destiny of...
Article
The practical design of a wirelessly controlled portable IV-curve tracer based on a capacitive load is described. The design is optimized for the measurement of solar cell modules presenting a high open circuit voltage of up to 6 kV and a low short circuit current below 100 mA. The portable IV-tracer allows for on-site/in-situ characterization of l...
Article
Vanadium pentoxide has been proposed as a good alternative hole transport layer for improving device lifetime of organic photovoltaics. The article presents a study on the optimization of slot-die-coated vanadium oxide films produced with a roll coating machine with the aim of achieving scalable organic solar cells and photo-detectors with improved...
Article
The role of the common stress factors such as high temperature, humidity, and UV irradiation on interface adhesion of roll-to-roll fabricated organic photovoltaic (OPV) devices is investigated. The samples range from bare front electrodes to complete devices. It is shown that applying single stress or combinations of stresses onto the samples varia...
Article
In an effort to understand recent results showing differences between the power conversion efficiencies of lead halide (CH3NH3PbI3-xClx) solar cells on glass versus flexible substrates, this study investigates the influence that substrate and processing methods have on morphological and crystallographic development. Using our in situ slot-die micro...
Article
Full-text available
Unlabelled: We report the use of roll-to-roll printed silver nanowire networks as front electrodes for fully roll-to-roll processed flexible indium-tin-oxide (ITO) free OPV modules. We prepared devices with two types of back electrodes, a simple Pedot: PSS back electrode and a Pedot: PSS back electrode with a printed silver grid in order to si...
Article
The results of a meta-analysis conducted on organic photovoltaics (OPV) lifetime data reported in the literature is presented through the compilation of an extensive OPV lifetime database based on a large number of articles, followed by analysis of the large body of data. We fully reveal the progress of reported OPV lifetimes. Furthermore, a generi...
Article
PBDTTTz-4 is employed in the ambient manufacturing of fully Roll-to-Roll organic solar cell modules. Modules are manufactured using a novel silver nanowire electrode or a previously reported carbon electrode. The average PCE of carbon modules (3.07%) and AgNW modules (1.46%) shows that PBDTTTz-4 is a good candidate for upscaling. Stability measurem...
Article
Full-text available
The unique properties of organic semiconductors make them versatile base materials for many applications ranging from light emitting diodes to transistors. The low spin-orbit coupling typical for carbon-based materials and the resulting long spin lifetimes give rise to a large influence of the electron spin on charge transport which can be exploite...
Article
The impact of additives mixed with poly(3,4-ethylenedioxythiophene):polysty­renesulfonate (PEDOT:PSS) on the stability of organic photovoltaic modules is investigated for fully ambient roll-to-roll (R2R) processed indium tin oxide free modules. Four different PEDOT:PSS inks from two different suppliers are used. The modules are manufactured directl...
Article
The presented work addresses the issue of lifetime prediction and intercomparison for organic photovoltaic (OPV) devices tested under different environmental conditions according to ISOS guidelines proposed recently at the International Summit on Organic Photovoltaic Stability. The studies employed P3HT:PCBM based devices produced with different ar...
Article
Full-text available
We report on medium area (1 cm2) slot-die coated organic photovoltaic devices (OPVs) of a recently developed semi-random copolymer of poly-3-hexylthiophene and diketopyrrolopyrrole (P3HTT–DPP-10%) mixed with phenyl-C61-butyric acid methyl ester ([60]PCBM). The devices were prepared using a compact laboratory roll-coater using only slot-die coating...
Article
It's a free-for-all! ITO-free organic photovoltaics are fabricated using roll-to-roll processing technology and laser cutting to separate and encapsulate individual modules. The modules are then made available free-of-charge from the author′s website (in an effort named “freeOPV”) to create a platform from which the processing technology can be eva...

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Projects

Projects (3)
Archived project
Study the effect of the degradation on organic solar cell devices.
Project
FP7-CHEETAH is a combined collaborative project (CP) and coordination and support action (CSA) funded under the FP7 European Commission’s programme. This project coordinated by ECN,NL and with 16 nationalities represented in the consortium has the ambition to develop technology and foster innovative manufacturing capabilities and photovoltaic products so that Europe can develop its technological and industrial capacity in all parts of the value chain to solve specific R&D and overcome fragmentation of European PV R&D in Europe and intensify the collaboration. CHEETAH KNOWLEDGE EXCHANGE Platform (KEAP) is the opportunity offered by FP7-CHEETAH to support cooperation within the broader PV research community in Europe among different players from research, academia, and industry by facilitating knowledge and information sharing, identifying technical and scientific needs and making available a wide range of information on expertise, infrastructures, equipment and PV technologies. This platform is based on a dynamic database, a powerful build-in search engine and a dedicated tool for on-line meetings, webinars, on-line tests and experiments. To receive more information visit CHEETAH Project and knowledge Exchange portal. You can also join us by our Linkedin group, Twitter, Google+ and YouTube CHEETAH KEAP web site http://www.cheetah-exchange.eu CHEETAH Project web site http://www.cheetah.project.eu CHEETAH KEAP Linkedin group https://www.linkedin.com/groups/8588104 TWITTER: https://twitter.com/cheetah_kEAP/following YouTUBE: https://www.youtube.com/channel/UCzaOGpmO139GXvJ23PHvxuw