Enlightening the temperature coefficient of triple mesoscopic CH₃NH₃PbI₃₋<i>x</i>Cl<i>_x</i>/NiO and double mesoscopic CsFAMAPbI₃₋<i>x</i>Br<i>_x</i>/CuSCN carbon perovskite solar cells

Temperature is one of the most crucial outdoor variables that influence the photovoltaic performance and stability of carbon perovskite solar cells (CPSCs), although not many reports are there on temperature-dependent CPSCs performance based on various mesoscopic structures. This study demonstrates the temperature coefficient (T C) of carbon-based triple and double mesoscopic devices having MAPICL [MAPbI 3−xCl x ] and CSFAMA [Cs 0.05(FA 0.83MA 0.17) 0.95Pb(I 0.83Br 0.17) 3] to understand the performance compatibility of different CPSC configurations despite the thermal treatment (MA = methylammonium, FA = formamidinium). While treating a single device in the range of 5 °C-65 °C, MAPICL-based CPSC maintained a power conversion efficiency (PCE) of ∼9%-11.7%. In contrast, CSFAMA-based double mesoscopic devices showed a PCE variation of ∼14%-16% in the same temperature window. The interesting fact of this analysis is that the average T C values for MAPICL and CSFAMA are in the order of 10 −4, implying better retention of performance for both mesoscopic devices despite thermal stress. A photoluminescence analysis has been done to understand the temperature-dependent charge transfer properties between the perovskite and transport layer. To the best of our knowledge, this analysis, for the first time, provides insight into the temperature coefficient of different CPSC mesoscopic structures to promote suitable future development.</p

Compelling temperature behaviour of carbon-perovskite solar cell for fenestration at various climates

Sustainable building with smart windows is a promising technology. Due to their nanostructured and composite materials, perovskite devices can play a crucial role as tunable transparent or semi-transparent photovoltaics managing the buildings' energy health for harvesting, storage and utilization. Here, the temperature profile of different properties essential for the application of carbon perovskite solar cell (c-PSC) in the BIPV (building-integrated photovoltaics) field is illuminated cautiously to find out its feasibility at various climatic conditions. The results dictate small changes in transparency and efficiency with temperature, which also impacts other BIPV-related parameters. At temperatures 15 to 55°C, the AVT (average visible transmittance) remains at ∼27.5%, with an average power conversion efficiency (PCE) of ∼10%, whereas AVT slightly increases above 55°C in ambient conditions. Interestingly the PCE values greatly correlate with the AVT. The observed pseudo-thermochromic nature of c-PSC is explained by correlating transmittance with temperature coefficient and efficiency coefficient of transparency. The indispensable parameters like colour rendering index (CRI), correlated colour temperature (CCT), solar factor (SF) are calculated utilizing theoretical models at different temperatures to illuminate the colour comfort of these c-PSCs for BIPV integration. Even after temperature treatment, the CCT values &gt;4800, and CRI values &gt;80 signify the possibility of perovskites in different climates. Finally, glare daylight control is analyzed based on temperature and climate, taking an average over the summer and the winter of different places, which display both the advantages and disadvantages of c-PSCs. All the results from this case study suggest that c-PSC can become an integral part of fenestration at different KÖppen climates with suitable modifications

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Pacifc white shrimp (Penaeus vannamei) farming has boosted the Indian shrimp production to an all-time high of 0.7 MMT. However, its susceptibility to pathogens, seed quality issues, asymmetry in inputs costs and market prices, environmental limitations and inadequate institutional support are threatening its sustainability. The present study was undertaken to assess its sustainability by developing a composite sustainability index delineating technology, economics, environment, social and institutional indicators. The results show that the pacifc white shrimp farming in India is sustainable with a mean sustainability index of 0.77. Majority of the surveyed farms (61%) were operated at moderate to high level of sustainability (0.66–0.84). Dimension wise analysis indicate that P. vannamei shrimp farming was technology driven, economically proftable, beneftted the society, yet, need improvement in environmental and institutional dimensions. Shrimp farm water reconditioning and reuse for subsequent crops, provision of institutional credit and insurance would further enhance its sustainability. Further access to quality shrimp seed, carrying capacity-based stocking density, optimization of inputs, mobilizing farmers for collective compliance of BMPs and strengthening institutional support mechanisms for domestic marketing are together complement the sustainability of shrimp farming in IndiaNot Availabl

Cdk5/p25-induced cytosolic PLA2-mediated lysophosphatidylcholine production regulates neuroinflammation and triggers neurodegeneration

10.1523/JNEUROSCI.5177-11.2012Journal of Neuroscience3231020-1034JNRS