Scientists present a novel and efficient semitransparent perovskite solar cells with graphene electrodes

Japan鈥檚 NEDO and Panasonic achieve 16.09% efficiency for large-area perovskite solar cell module

Panasonic Corporation has achieved an energy conversion efficiency of 16.09% for a perovskite solar module (Aperture area 802 cm2: 30 cm long x 30 cm wide x 2 mm thick) by developing lightweight technology using a glass substrate and a large-area coating method based on inkjet printing. This was carried out as part of the project of the New Energy and Industrial Technology Development Organization (NEDO), which is working on the “Development of Technologies to Reduce Power Generation Costs for High-Performance and High-Reliability Photovoltaic Power Generation” to promote the widespread adoption of solar power generation. This inkjet-based coating method that can cover a large area reduces manufacturing costs of modules. In addition, this large-area, lightweight, and high-conversion efficiency module allows for generating solar power highly efficiently at locations where conventional…

Researchers at The Hong Kong Polytechnic University (PolyU) have developed efficient and low-cost semitransparent perovskite solar cells with graphene electrodes. The power conversion efficiencies (PCEs) of this novel invention are around 12% when they are illuminated from Fluorine-doped Tin Oxide bottom electrodes (FTO) or the graphene top electrodes, compared with 7% of conventional semitransparent solar cells.

PolyU researchers used graphene as an electrode material, after creating simple processing techniques for enhancing the conductivity of graphene to meet the requirement of its applications in solar cells. To begin with, the conductivity of graphene was dramatically improved by coating a thin layer of conductive polymer that was also used as an adhesion layer to the perovskite active layer during the lamination process. Im addition, the performance of this novel invention is further optimized by improving the contact between the top graphene electrodes and the hole transport layer on the perovskite films.

Thanks to the convenient preparation of the devices, PolyU’s invention can be used for the mass production of the semitransparent perovskite solar cells with printing or roll to roll process. The semitransparent solar cells aims to fill the gap in the market which is not achievable by the existing solar cells dominating the market.

In August 2015, Graphene-pervoskite hybrids were discovered to ebnable ultra-efficient photodetectors

nanowerkHybrids and related materialsPerovskite applicationsPerovskite SolarTechnical / research
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New quality control method could help scale up perovskite solar cells

Researchers from Australia’s ARC Center of Excellence in Exciton Science, Monash University, Wuhan University of Technology and CSIRO Energy have shown how critical imperfections invisible to the naked eye can be detected by shining blue light onto the cells and recording the infrared light that bounces back. Perovskite solar cells bathed in blue light, and responding in infrared. Credit: Exciton Science This “trick of the light” may help detect imperfections in perovskite solar cells, opening the door to improved quality control for commercial production. When attempting to scale up perovskite cells, performance often deteriorates due to nanoscale surface imperfections resulting from the way the materials are made. As the number of detects grows, the amount of solar power generated per square centimeter drops. Now,the Australian research team has come up…