Meeting goals of sustainability policy: CO2 emission reduction, cost-effectiveness and societal acceptance. An analysis of the proposal to phase-out coal in the Netherlands

The mitigation of global climate change renders effective policy indispensable. In this paper we evaluate a policy drafted in the Netherlands to close all its remaining coal-fired plants by 2030, which is well before the end of their technical and economic life spans. This plan is part of a package to reduce CO2 emissions with 25% by 2020 and 49% by 2030 in comparison to 1990. Under Dutch policy, all measures taken must meet three goals: CO2 emission reduction, cost-effectiveness and societal support. We will show that existing EU legal frameworks limit the effectiveness of the closure, because they allow for carbon leakage and lack a coordinated European strategy on the coal phase out, even though several EU member states have formulated similar plans. There is also no definitive answer as to whether the coal phase out is cost-effective. Dutch government will have to decide what the parameters of ‘cost-effective’ are. So far, the plan enjoys societal support. It is up to the Dutch government to decide what balance between CO2 emissions, costs and societal support is best. For further action, we recommend an EU strategy on the coal-phase out, in order to coordinate and to prevent carbon leakages

Tackling self-absorption in luminescent solar concentrators with type-II colloidal quantum dots

Luminescent solar concentrators are low cost photovoltaic devices, which reduce the amount of necessary semiconductor material per unit area of a solar collector by means of concentration. The device is comprised a thin plastic plate in which luminescent species (fluorophores) have been incorporated. The fluorophores absorb the solar light and radiatively re-emit part of the energy. Total internal reflection traps most of the emitted light inside the plate and wave-guides it to a narrow side facet with a solar cell attached, where conversion into electricity occurs. The efficiency of such devices is as yet rather low, due to several loss mechanisms, of which self-absorption is of high importance. This work demonstrates that type-II semiconductor hetero-nanocrystals may offer a solution to the self-absorption problem in luminescent solar concentrators. (C) 2013 Elsevier B.V. All rights reserved