Smart Materials for Energy Harvesting, Energy Storage, and Energy Efficient Solid-State Electronic Refrigeration

Abstract

The new emerging fields of MEMS-based energy harvesting from piezoelectric materials, lead to the development of solid-state electrostatic energy storage for better power/energy distribution for renewable energy and the solidstate electrocaloric cooling for low energy and hazard free refrigeration. Among them it is being reported that on application of 8.693 TPas -1 oscillated stress generates 10 Vs -1 oscillated voltage in 300 nm 0.75PMN-0.15PT thin films where 22 Jcc -1 s -1 of oscillated energy density can be harvested on application of 15 TPas -1 oscillated pressure upon 500 nm thin film of same material. It is also described that La modified antiferroelectric PbZrO 3 (PZ) thin films are the potential materials that can achieve the high energy density storage density in the order of 103 J/kg. Though PZT-based antiferroelectric cooling triggered the research on the materials for electrocaloric cooling by the amount of 12 K adiabatic decrease in temperature on withdrawal of electric field, the decrease in temperature by 11.4 K in pure PZ and by 31 K in 0.63PMN-0.37PT thin film are found commendable.

Femto- to Millisecond Time-Resolved Photodynamics of a Double-Functionalized Push–Pull Organic Linker: Potential Candidate for Optoelectronically Active MOFs

“…This has been possible due to a combination of diverse factors, such as the chemical tunability of MOFs (exchangeability of metal clusters and organic linkers), which has favored the synthesis of an uncountable number of MOF materials, their excellent physicostructural conditions (ordered structures with large surface areas and accessible pores) and their promising abilities to be deployed into a wide range of technological applications [ 2 , 3 , 4 , 5 ]. In fact, MOFs and guest@MOF composites have emerged as versatile candidates in energy management [ 6 , 7 ], storage of fuels such as H 2 and methane [ 8 , 9 ], and biological or medical applications [ 10 , 11 , 12 ]. Among all the possible MOF structures and composites, those who emit light have become very popular because of their possible integration in different photonic technologies as luminescent chemical and physical sensors or optoelectronic devices [ 13 , 14 , 15 , 16 ].…”