The European Commission's energy security package lays out the EU's commitment to the Energy Union but leaves some doubt about its commitment to the clean energy transition.
Volume 1 Issue 3, March 2016
Books & Arts
News & Views
The performance of CdTe solar cells — cheaper alternatives to silicon photovoltaics — is hampered by their low output voltages, which are normally well below the theoretical limit. Now, record voltages of over 1 V have been reported in single-crystal CdTe heterostructure solar cells, which are close to those of benchmark GaAs cells.
The chemistry of the discharge products of metal–oxygen batteries is related to the battery's efficiency but knowledge of their formation mechanism is incomplete. Now, the initial discharge product in sodium–oxygen batteries is shown to be sodium superoxide, which undergoes dissolution and then transforms to sodium peroxide dihydrate.
The transport sector must undergo radical changes if it is to reduce its carbon emissions, calling for alternative vehicles and fuel types. Researchers now analyse the expectation cycles for different fuel technologies and draw lessons for the role of US policy in supporting them.
The oxidation of water is essential to the sustainable production of fuels using sunlight or electricity, but designing active, stable and earth-abundant catalysts for the reaction is challenging. Now, a complex containing five iron atoms is shown to efficiently oxidize water by mimicking key features of the oxygen-evolving complex in green plants.
Solar cells based on solution-processed colloidal quantum dots are promising alternatives to conventional devices. This Review discusses recent advances and outstanding challenges for the field of quantum dot solar cells towards their commercialization.
The use of doped-silicon contacts in silicon solar cells adds cost and complexity to the fabrication process. These issues can now be circumvented by using dopant-free carrier-selective interfaces on silicon, realized by alkali metal fluorides and metal oxides.
Uncontrolled lithium deposition during cycling is a major concern in the development of lithium-based batteries. Here, the authors analyse the lithium nucleation pattern on various metal substrates and demonstrate that lithium can be selectively deposited in a nanoseed inside hollow carbon spheres.
Alternative fuel technologies are crucial to decarbonize transport, but attention has shifted among options over time. This study presents an analysis of media, innovation and funding data for these different options and recommends actions to help move beyond hype to support technology adoption.
Solar cells based on CdTe are a promising low-cost alternative to mainstream Si devices, but they usually produce voltages below 900 mV. Burst et al. now show that open-circuit voltages greater than 1 V can be achieved by doping the CdTe with a group V element.