Stable and highly transparent Perovskite cell and module for high efficiency Perovskite/c Si 4-terminal tandems

The purpose of the work is to investigate high-efficient and stable 4-terminal perovskite/c-Si tandem devices. Hybrid tandems of c-Si bottom cells and perovskite top cells are perhaps the most promising candidates to reduce the levelized cost of electricity by increasing the overall tandem cell efficiency. To turn this promise in a commercial...

Stable and highly transparent perovskite cells and modules for high efficiency perovskite/c-Si 4-thermal tandems

Crystalline silicon solar cell with front and rear polysilicon passivated contacts as bottom cell for hybrid tandems

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...

Evaluation of bottom cell concepts for perovskite / crystalline silicon tandems

In this paper, we investigate the potential performance of 4-terminal tandem cell structures based on different types of crystalline silicon (cSi) bottom cells, with a methylammonium-lead-triiodide perovskite solar cell (PSC) on top. We evaluate industrial high-efficiency 6 inch bottom cells, including several back-contact technologies, as...

Towards the scaling up of perovskite solar cells and modules

A direct current (DC) simulation for perovskite solar cells with different dimensions was performed. The theoretical results demonstrate a good agreement with experimental data, indicating the reliability of the performed simulation. A theoretical model was applied for the investigation of large area devices with different sheet resistances of...

Failure analysis in ITO-free all-solution processed organic solar cells

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...

High efficiency, fully inkjet printed organic solar cells with freedom of design

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...

Scaling up ITO-Free solar cells

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...

Round Robin performance testing of organic photovoltaic devices

This study addresses the issue of poor intercomparability of measurements of organic photovoltaic OPV)devices among different laboratories. We present a round robin performance testing of novel OPV devices among 16 laboratories, organized within the framework of European Research Infrastructure Project (SOPHIA) and European Energy Research...

Determination of the intrinsic diode parameters of polymer solar cells

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.1 Electrical modeling is carried out to optimize the grid pattern in these polymer solar cells. The...

Towards an all-solution processed polymer solar cell

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...

Technology development for roll-to-roll production of organic photovoltaics

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...

An inter-laboratory stability study of roll-to-roll coated flexible polymer solar modules

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...

Towards low cost, efficient and stable organic photovoltaic modules

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...

Technology Development for Roll-to-Roll Production of Organic Photovoltaics

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...

Unconventional device concepts for polymer solar cells

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...

Fabrication and characterisation of polymer based solar cells

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Photovoltaic properties of a conjugated polymer blend of MDMO-PPV and PCNEPV

Photovoltaic properties of solution-processed semiconducting polymer blends have been studied. It is demonstrated that photoinduced charge transfer occurs in binary mixtures of poly[2-methoxy-5-(3,7-dimethyloctyloxy)-1,4-phenylenevinylene] (MDMO-PPV) and poly-[oxa-1,4-phenylene-(1-cyano-1,2-vinylene)-(2-methoxy-5-(3, 7-dimethyloctyloxy)-1,4...