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Publications (109)
Semitransparent perovskite solar cells (ST-PSCs) are very attractive due to their potential applications in single junctions for building-integrated photovoltaics (BIPV) and in tandem PV technology using low-bandgap bottom solar cells. Despite the high efficiency achieved, the ST-PSCs still suffer low bifaciality, which can limit their overall ener...
A two-step sequential deposition method has been applied to prepare the solar cells with two types of perovskites Cs0.15FA0.85Pb(I0.95Cl0.05)3 and Cs0.15FA0.85Pb(I0.95Br0.05)3. In order to obtain the perovskite layers, the different sources of bromine and chlorine atoms were used for synthesis. The performance and time stability of chloride-based p...
Solution-processed photodetectors could be of use in large-area light-sensing applications because they can be fabricated at low cost on plastic substrates and their absorption spectra can be tuned by chemical design. However, fabricating photodetectors with low dark currents and integrating them into high-resolution backplanes remains challenging....
Photovoltaics International, Edition 45
The chemistry of the interface between the metal halide perovskite absorber and the charge transport layer affects the performance and stability of metal halide perovskite solar cells (PSCs). The literature provides several examples of poor PSC conversion efficiency values, when electron transport layers (ETLs), such as SnO2 and TiO2, are processed...
Improving the long-term stability of perovskite solar cells is critical to the deployment of this technology. Despite the great emphasis laid on stability-related investigations, publications lack consistency in experimental procedures and parameters reported. It is therefore challenging to reproduce and compare results and thereby develop a deep u...
In order to achieve the highest performance of organometal trihalide perovskite solar cells, it is required to recognize the dominant mechanisms which play a key role in a perovskite material. In the following studies, we have focused on the interfacial recombination between the hole transporting layer (HTL) and the perovskite CH3NH3PbI3 in solar c...
We report a cooperative study conducted between different laboratories to investigate organic solar cell degradation with respect to P3HT material properties and different solar cell architectures. Various batches of P3HT were collected from different suppliers reflecting commercial availability as well as properties variability. Among the material...
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...
The perovskite/c-Si tandem technology is considered as a cost-effective approach to realize a cell efficiency beyond the limit of single-junction (SJ) c-Si cells. Compared to its counterpart of 2-terminal (2T) configuration, 4-terminal (4T) tandem has the advantages such as no constraint of current matching and potentially simple mechanical stackin...
Hybrid-organic perovskites are proven materials for thin-film photovoltaics, with efficiencies over 23.25% at lab-scale. In order to promote the lab-scale research to fab-scale, it is essential to achieve an environmentally-friendly, affordable, and highly efficient process. Here, we report on the upscaling of sheet-to-sheet (S2S) slot-die processi...
The replacement of the conventional top metal contact with a semi‐transparent conducting electrode such as sputtered indium‐tin oxide (ITO) is strictly required to adopt the perovskite solar cell (PSC) in hybrid tandem photovoltaic applications. In order to prevent sputtering damages on the perovskite absorber and the organic materials adopted in p...
In this work, we present an extensive characterization of plasma-assisted atomic-layer-deposited (ALD) SnO2 layers, with the aim of identifying key material properties of SnO2 to serve as an efficient electron transport layer (ETL) in perovskite solar cells (PSCs). Electrically resistive SnO2 films are fabricated at 50 °C, while a SnO2 film with a...
This work is part of the interlaboratory collaboration to study the stability of organic solar cells containing PCDTBT polymer as a donor material. The varieties of the OPV devices with different device architectures, electrode materials, encapsulation, and device dimensions were prepared by seven research laboratories. Sets of identical devices we...
Stability of organic solar cells with PCDTBT donor polymer: An interlaboratory study – ERRATUM - Laura Ciammaruchi, Ricardo Oliveira, Ana Charas, Tulus, Elizabeth von Hauff, Giuseppina Polino, Francesca Brunetti, Rickard Hansson, Ellen Moons, Miron Krassas, George Kakavelakis, Emmanuel Kymakis, José G. Sánchez, Josep Ferre-Borrull, Lluis F. Marsal,...
We report on the spin-coated (SC) and sheet-to-sheet (S2S) slot-die processed stable non-transparent and semi-transparent PSCs. Results demonstrated that S2S upscaling from small to 15x15 cm2 area exhibited no loss in PCE of PSCs. In this study, a Cs/FA/MA triple cation perovskite has been deposited as absorber layer, and metal oxide layers have be...
Metal-halide based perovskites are extremely promising novel materials for thin-film photovoltaics, exhibiting cell power conversion efficiencies (PCEs) up to 22.7% [1]. A number of challenges still need to be addressed before PSCs can enter the PV market. One of these challenges is the development of industry-relevant technologies for scaling up t...
Perovskite solar cells (PSCs) are emerging among the photovoltaic (PV) technologies due to their high power conversion efficiency (PCE) in combination with potentially low cost manufacturing processing. In this contribution, the fabrication of efficient planar n-i-p PSCs by the modification of the electron transport layer (ETL) adopted as n-type co...
In this study, the fabrication of highly efficient and durable flexible inverted perovskite solar cells (PSCs) is reported. Presynthesized, solution-derived NiOx and ZnO nanoparticles films are employed at room temperature as a hole transport layer (HTL) and electron transport layer (ETL), respectively. The triple cation perovskite films are produc...
A hybrid organic-inorganic solar cell is provided that includes a substrate, a transparent
conductive oxide (TCO) layer deposited on the substrate, an n-type electron transport
material (ETM) layer, a p-type hole transport material (HTM) layer, an i-type perovskite
layer, and an electrode layer, where the substrate layers are arranged In an n-i-p s...
The combination of a semi-transparent, wide band gap perovskite solar cell (ST PSC) with a crystalline silicon (c-Si) bottom cell in a tandem configuration is considered a promising approach to enhance solar cell efficiencies over the current single junction c-Si cell efficiencies. In this study, we use a simple model based on experimental EQEs and...
Scalable sheet-to-sheet slot die coating processes have been demonstrated for perovskite solar cells and modules. The processes have been developed on 6in. × 6in. glass/ITO substrates for two functional layers: the perovskite photo-active layer and the Spiro-OMeTAD hole transport layer. Perovskite solar cells produced using these slot die coating p...
In this paper we analyze and model perovskite/c-Si tandem cells with front and rear polySi passivated contacts on the bottom cell. A high-efficiency tandem approach will benefit from the high Voc potential of a c-Si bottom cell with front and rear polySi passivated contacts while the combination with a high band gap, semi-transparent, perovskite to...
Perovskite solar cells employing poly(3,4-ethylenedioxythiophene) (PEDOT) as hole transport layer on top of methylammonium lead halide are reported, yielding a power conversion efficiency of 11% and a 6% stabilized power output. An atomic layer deposition assisted interface architectural approach is adopted to fabricate the n–i–p perovskite/PEDOT d...
Geplaatst op 06 december 2016 om 16:21 uur Toevoeging van een enkele nanometers dun laagje aluminiumoxide beschermt een zonnecel van perovskiet tegen aantasting van vocht-vooralsnog een belangrijk struikelblok naar commerciële toepassing voor dit nieuwe type zonnecel. Verrassende bijvangst bleek een verhoging van het rendement met drie procent. Dat...
Perovskite materials are drawing tremendous interest for photovoltaic
solar cell applications, but are hampered by intrinsic
material and device instability issues. Such issues can arise from
environmental influences as well as from the chemical incompatibility
of the perovskite layer with charge transport layers and
electrodes used in the device s...
The addition of a few nanometers of a thin layer of aluminum oxide protects a perovskite solar cell against humidity still a major stumbling block to the commercial application of this new type of solar cell. A surprising bonus is a yield boost of 3 percent.
The addition of a few nanometers of a thin layer of aluminum oxide protects a perovskite solar cell against humidity - still a major stumbling block to the commercial application of this new type of solar cell. A surprising bonus is a yield boost of 3 percent. These are the findings of researchers at Eindhoven University of Technology (TU/e) and re...
Tech Nieuw type zonnecel houdt hoog en stabiel rendement Lisa Boerop (/tags/personen/lisa-boerop) • 2 uur 53 minuten geleden @lisaboerop (https://twitter.com/@lisaboerop) (/tags boero De zonnepanelen die nu op daken liggen hebben een rendement van rond de 15 procent. Maar wetenschappers hebben een nieuw type zonnecel ontworpen met een veel hoger re...
Het materiaal perovskiet is een veelbelovend materiaal om zonnecellen mee te maken. Het is goedkoper dan silicium en het recordrendement is de afgelopen jaren snel toegenomen. Groot nadeel is dat het materiaal snel degradeert onder invloed van vocht. Onderzoekers van de TU Eindhoven brachten een flinterdun beschermlaagje aan om het materiaal een st...
The perovskite solar cell is considered a promising candidate as the top cell for high-efficiency tandem devices with crystalline silicon (c-Si) bottom cells, contributing to the cost reduction of photovoltaic energy. In this contribution, a simulation method, involving optical and electrical modelling, is established to calculate the performance o...
In this paper we discuss a problem-solving methodology and present guidance for troubleshooting defects in ITO-free all-solution processed organic solar cells with an inverted cell architecture. A systematic approach for identifying the main causes of failures in devices is presented. Comprehensive analysis of the identified failure mechanisms allo...
The organic photovoltaics field is maturing and reaching a technology readiness level where the focus is on
developing large scale fabrication methods. In this light, fully inkjet printed organic solar cells were
demonstrated. Inkjet printing allows direct patterning of all the layers, including the electrodes, offering
full freedom of design witho...
Stabilities of ITO-containing and ITO-free organic solar cells were investigated under simulated AM 1.5G illumination and under concentrated natural sunlight. In both cases ITO-free devices exhibit high stability, while devices containing ITO show degradation of their photovoltaic performance. The accelerated degradation under concentrated sunlight...
Solar cells are generally optimised for operation under AM1.5 100 mW cm(-2) conditions. This is also typically done for polymer solar cells. However, one of the entry markets for this emerging technology is portable electronics. For this market, the spectral shape and intensity of typical illumination conditions deviate considerably from the standa...
Indium-tin-oxide-free (ITO-free) polymer solar cells with composite electrodes containing current-collecting grids and a semitransparent poly(3,4-ethylenedioxythiophene):polystyrenesulfonate) (PEDOT:PSS) conductor are demonstrated. The up-scaling of the length of the solar cell from 1 to 6 cm and the effect of the grid line resistance are explored...
Five different indium‐tin‐oxide free (ITO‐free) polymer solar cell architectures provided by four participating research institutions that all presented a laboratory cell performance sufficient for use in mobile and information and communication technology (ICT) were evaluated based on photovoltaic performance and lifetime tests according to the IS...
Polymer solar cells may be applied in portable electronic devices, where light intensity and spectral distribution of the illuminating source can be very different compared to outdoor applications. As the power output of solar cells depends on temperature, light intensity and spectrum, the design of the module must be optimized for the specific ill...
Polymer solar cells offer a promising low cost alternative in photovoltaics if the expensive ITO electrode can be omitted. Recently an alternative based on highly conductive PEDOT:PSS in combination with current collecting grids was developed. Electrical modeling is carried out to optimize the grid pattern in these polymer solar cells. The basic in...
ITO-free organic solar cells with ink-jet printed current collecting grids and high conducting PEDOT:PSS as a composite anode are demonstrated. Inkjet printed current collecting grids with different cross-sectional areas have been investigated. The effect of the width and height of the grid lines and busbars has been measured and modeled by direct...
a b s t r a c t A new encapsulation method for organic solar cells has been tested on flexible solar modules and cells embedded in polyurethane, sandwiched between a tempered glass plate and a polycarbonate plate. Panels, each containing 10 organic solar modules/cells, were fabricated and installed for outdoor exposure in eight different countries...
Indium-tin-oxide (ITO) free polymer solar cells prepared by ink jet printing a
composite front electrode comprising silver grid lines and a semitransparent PEDOT:PSS conductor are demonstrated. The effect of grid line density is explored for a large series of devices and a careful modeling study enabling the identifi cation of the most rational gri...
The image depicts indium tin oxide (ITO)-free polymer solar cells, prepared by ink jet printing a composite front electrode comprising silver grid lines and a semitransparent PEDOT:PSS conductor. On page 103, Y. Galagan et al. demonstrate the effect of grid-line density on the performance of these current-collecting grids for ITO-free polymer solar...
a b s t r a c t The presence of a transparent conductive electrode such as indium tin oxide (ITO) limits the reliability and cost price of organic photovoltaic devices as it is brittle and expensive. Moreover, the relative high sheet resistance of an ITO electrode on flexible substrates limits the maximum width of a single cell. We have developed a...
A large number of flexible polymer solar modules comprising 16 serially connected individual cells was prepared at the experimental workshop at Risø DTU. The photoactive layer was prepared from several varieties of P3HT (Merck, Plextronics, BASF and Risø DTU) and two varieties of ZnO (nanoparticulate, thin film) were employed as electron transport...
In order to reach the objective of low-cost, large area organic photovoltaic systems, we build up a knowledge base concerning the influence of process conditions on the performance of polymer solar cells. A large area solar cell module, with roll-to-roll coated PEDOT:PSS and photoactive layers (based on P3HT:[C60]PCBM blend) on a flexible substrate...
To reduce the costs of polymer solar cells it is important to develop a fully solution processed route. Although several successful generic routes to solution processed hole collecting electrodes have been shown, this is not the case for the electron collecting electrode of polymers cells, as it is hard to find a solution processable low workfuncti...
Nanostructured polymer-based solar cells (PSCs) have emerged as a promising low-cost alternative to conventional inorganic photovoltaic devices and are now a subject of intensive research both in academia and industry. For PSCs to become practical efficient devices, several issues should still be addressed, including further understanding of their...
The presence of a brittle and expensive ITO electrode is a limiting factor towards low cost OPV modules. Moreover, ITO layers on PET or PEN substrates are typically characterized by relatively high sheet resistances and the presence of large amounts of spikes that lead to efficiency losses. We have developed an alternative for the ITO anode, based...
The presence of a transparent conductive electrode such as indium tin oxide (ITO) limits the reliability and cost price of organic photovoltaic devices as it is brittle and expensive. Moreover, the relative high sheet resistance of an ITO electrode on flexible substrates limits the maximum width of a single cell. Holst Centre and ECN have developed...
The effect of the molecular weight of poly[9,9-didecanefluorene-alt-(bis-thienylene) benzothiadiazole] (PF10TBT) on the photovoltaic performance of fullerene-based bulk heterojunction solar cells is investigated. An increase in molecular weight of two orders of magnitude results in a 30% increase of the short-circuit current and a rise of the fill...
The performance of polymer solar cells (PSCs) strongly depends on the three-dimensional morphological organization of the compounds within the bulk heterojunction active layer. Donor and acceptor materials should form co-continuous networks with nanoscale phase separation to sustain effective dissociation of excitons into free electrons and holes a...
The inclusion of metal-oxide layers in polymer solar cells enables the fabrication of a series of unconventional device architectures. These devices include: semi-transparent polymer solar cells, devices with inverted polarity, as well as devices with air stable electrodes. A proof-of-principle of these devices is presented. The anticipated benefit...
Tandem solar cells, in which two individual cells are stacked on top of each other, offer the potential to increase the efficiency significantly compared to a single cell on the same area. To reach maximum efficiency, each cell in the stack must have a distinctive spectral response and the current in each cell must be similar. This requires smart s...