The Institute for Solar Energy Research Hamelin increases the module efficiency for large-area solar modules with industrial silicon-based PERC solar cells to a record value of 20.2% with a power of 303.2W. Thereby, the ISFH surpasses the former module record efficiency of 19.5% for industrial-type modules with p-type silicon solar cells and screen-printed metallization.
The Institute for Solar Energy Research Hamelin (ISFH), an affiliated institute of the “Leibniz Universität Hannover”, increases the module efficiency for large-area solar modules with industrial silicon-based PERC solar cells to a record value of 20.2% with a power of 303.2W, which was confirmed in an independent measurement by the TÜV Rheinland.
Thereby, the ISFH surpasses the former module record efficiency of 19.5% for industrial-type modules with p-type silicon solar cells and screen-printed metallization.
The results were achieved within the project “Prozessplattform und Verlustanalyse für klimastabile hocheffiziente Photovoltaikmodule mit kristallinen PERC-Si-Solarzellen” (PERC-2-Module) funded by the German Federal Ministry for Economic Affairs and Energy (BMWi).
The module consists of 120 halved solar cells that feature an average efficiency of 20.8%. By using the half-cell design the current of the cell strings is reduced resulting in a significant reduction of the series resistance losses. The distance between the cells is reduced to a practical minimum to increase the module efficiency.
The resultant module area without frame is 1.501 m2. In order to use light hitting the cell interconnects and the space between the solar cells for current generation, high-reflective and structured materials are utilized which guide the light onto the solar cells active surface.
“This record efficiency is the result of a closely joined development of the PERC solar cell technology on the one hand and of the high-efficient module processes at ISFH on the other hand”, explains Dr. Henning Schulte-Huxel, the head of the research project PERC-2-Module.
The p-type PERC solar cells were fabricated using an industrial screen printing process for front and rear side. These cells developed at ISFH are optimized for the operation in modules and show no potential-induced degradation.
This was confirmed in numerous internal tests of the solar cells using the conditions of 85% relative humidity, a temperature of 85°C, and an applied voltage of 1000V for 1000h. This stress surpassed the standard test by more than ten times.
About 80% of all commercially-produced solar cells consist of p-type crystalline silicon wafers in combination with a screen printed metallization. Since the material cost during module manufacturing and especially the system cost grow with the module area, the demonstrated optimization of the module efficiency is highly relevant for the reduction of the cost of electricity generated by photovoltaics.
Dr. Roland Goslich | idw - Informationsdienst Wissenschaft
Solid progress in carbon capture
27.10.2016 | King Abdullah University of Science & Technology (KAUST)
Greater Range and Longer Lifetime
26.10.2016 | Technologie Lizenz-Büro (TLB) der Baden-Württembergischen Hochschulen GmbH
Ultrafast lasers have introduced new possibilities in engraving ultrafine structures, and scientists are now also investigating how to use them to etch microstructures into thin glass. There are possible applications in analytics (lab on a chip) and especially in electronics and the consumer sector, where great interest has been shown.
This new method was born of a surprising phenomenon: irradiating glass in a particular way with an ultrafast laser has the effect of making the glass up to a...
Terahertz excitation of selected crystal vibrations leads to an effective magnetic field that drives coherent spin motion
Controlling functional properties by light is one of the grand goals in modern condensed matter physics and materials science. A new study now demonstrates how...
Researchers from the Institute for Quantum Computing (IQC) at the University of Waterloo led the development of a new extensible wiring technique capable of controlling superconducting quantum bits, representing a significant step towards to the realization of a scalable quantum computer.
"The quantum socket is a wiring method that uses three-dimensional wires based on spring-loaded pins to address individual qubits," said Jeremy Béjanin, a PhD...
In a paper in Scientific Reports, a research team at Worcester Polytechnic Institute describes a novel light-activated phenomenon that could become the basis for applications as diverse as microscopic robotic grippers and more efficient solar cells.
A research team at Worcester Polytechnic Institute (WPI) has developed a revolutionary, light-activated semiconductor nanocomposite material that can be used...
By forcefully embedding two silicon atoms in a diamond matrix, Sandia researchers have demonstrated for the first time on a single chip all the components needed to create a quantum bridge to link quantum computers together.
"People have already built small quantum computers," says Sandia researcher Ryan Camacho. "Maybe the first useful one won't be a single giant quantum computer...
14.10.2016 | Event News
14.10.2016 | Event News
12.10.2016 | Event News
27.10.2016 | Materials Sciences
27.10.2016 | Physics and Astronomy
27.10.2016 | Life Sciences