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Thin films of crystalline materials called perovskites provide a promising new way of making inexpensive and efficient solar cells. Now, an international team of researchers has shown a way of flipping a chemical switch that converts one type of perovskite into another—a type that has better thermal stability and is a better light absorber.

The study, by researchers from Brown University, the National Renewable Energy Laboratory (NREL) and the Chinese Academy of Sciences’ Qingdao Institute of Bioenergy and Bioprocess Technology published in the Journal of the American Chemical Society, could be one more step toward bringing to the mass market.

“We’ve demonstrated a new procedure for making solar cells that can be more stable at moderate temperatures than the perovskite solar cells that most people are making currently,” said Nitin Padture, professor in Brown’s School of Engineering, director of Brown’s Institute for Molecular and Nanoscale Innovation, and the senior co-author of the new paper. “The technique is simple and has the potential to be scaled up, which overcomes a real bottleneck in perovskite research at the moment.”

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(Phys.org)—For the past 17 years, spiro-OMeTAD, has been keeping a secret. Despite intense research efforts, its performance as the most commonly used hole-transporting material in perovskite and dye-sensitized solar cells has remained stagnant, creating a major bottleneck for improving solar cell efficiency. Thinking that the material has given all it has to offer, many researchers have begun investigating alternative materials to replace spiro-OMeTAD in future solar cells.

But in a new study published in Science Advances, Dong Shi et al. have taken a closer look at spiro-OMeTAD and found that it still has a great deal of untapped potential. For the first time, they have grown single crystals of the pure material, and in doing so, they have made the surprising discovery that spiro-OMeTAD’s single-crystal structure has a hole mobility that is three orders of magnitude greater than that of its thin-film form (which is currently used in solar cells).

“This paper reports a major breakthrough for the fields of perovskite and solid-state by finally clarifying the potential performance of the material and showing that improving the crystallinity of the hole transport layer is the key strategy for further breakthroughs in device engineering of these solar cells,” Osman Bakr, a professor of engineering at King Abdullah University of Science and Technology (KAUST) in Saudi Arabia and leader of the study, told Phys.org.

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While speaking at a transport conference in Norway this week, Elon Musk articulated that Tesla’s plan to revolutionize the transportation industry is much broader and more ambitious than initially assumed. In other words, if you thought Tesla’s master plan to usher in an EV revolution was going to end once the Model 3 hit mass production, think again.

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Far from it, Tesla is just getting started. Not only have we heard reports that Tesla is eyeing a crossover vehicle based on the Model 3, Musk has also suggested that a Tesla pickup truck might also be a possibility later on down the line.

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2016-04-21-post-paris

“Inevitably, the compromises of the Paris Agreement make it both a huge achievement and an imperfect solution to the problem of global climate change.”

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Nice

HYDERABAD: In an initiative that may improve farm productivity, Indian Institute of Technology (IIT), Mumbai and Professor Jayashankar Telangana State Agriculture University (PJTSAU), Hyderabad have joined hands to develop nanosensors that can read the percentage of moisture and nutrients in the soil. This new research is expected to provide an important technological innovation in the field of agriculture. This is for the first time an IIT is collaborating with an agricultural university to devise solutions for the farmers.

“While we were exploring the possibilities of nano technology in various fields, the idea of using it in agriculture sector struck us. Thanks to the interest shown by some agricultural scientists at PJTSAU, we decided to develop nanosensors which can calculate the moisture content of the soil. There is a need for IITs to work for solving the problems faced by farmers and this is a step in that direction,” said V Ramgopal Rao, director of IIT Delhi, who was instrumental in initiating the research project, while he was the chief investigator of Centre of Excellence in Nanoelectronics Project at IIT, Mumbai.

While IIT, Mumbai will develop the nano soil sensors, PJTSAU will serve as the testing partner and conduct field tests to assess the efficacy of nanosensors. Already, funds have been allotted by IIT for the research project and a team of agricultural scientists and technologists has been formed to work on the project.

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Like it — turning those old plastic into Graphene bags.

Summary: The project will also motivate people to collect used plastic bottles and other plastic waste, which is degrading to the environment, and help us in putting it to good use. Once the varsity is able to make graphene out of the plastic waste, it can eventually also be used as an alternate source of energy. We received an approval letter for the project proposal on April 16 and the initial grant of Rs 1,97,88,800 for a period of three years has been approved. “Dhami also said that much of the encouragement for research work in the varsity came from governor K K Paul, who has been motivating universities in the state to pursue research in nano science and nano technology. In fact, even wrappers and packets of chips are an environmental hazard.

DEHRADUN: A project proposed by Kumaun University in Nainital to synthesize graphene from plastic waste to use the material in energy and biomedical applications has received approval for a grant of nearly Rs 2 crore. Confirming that the grant has been approved, vice-chancellor of Kumaun University, H S Dhami, said, “It is a great achievement as the varsity aims at contributing to the society through research work. We received an approval letter for the project proposal on April 16 and the initial grant of Rs 1,97,88,800 for a period of three years has been approved.” The grant has been approved by The National Mission on Himalayan Studies (NMHS), G B Pant Institute of Himalayan Environment and Development (GBPIHED), Ministry of Environment, Forests and Climate Change.

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