In recent years, inorganic CsPbBr3-based perovskites have accomplished considerable progress owing to their superior stability under harsh humid environment.

The current study offers insight into the role of motivation and constraints on behavioural intentions prior to a mega event. The Psychological Continuum Model framework was used to integrate motivation and leisure constraints theory to examine attraction towards the 2008 Olympic Games. Semi-structured interviews (N = 47) and a questionnaire (N = 235) distributed in Australia and the USA were used to identify and measure three motivational themes: cultural learning, cultural experience and olympic event interest, and three perceived constraints: structural, interpersonal and intrapersonal. Structural Equation Modelling revealed that motives were positively related to behavioural intentions while constraints were negatively related. Analysis further revealed the interaction between motives and perceived constraints led to two different forms of behavioural intentions; intentions to travel and attend the event vs. stay home to watch the event on TV. Policy and marketing implications are discussed that illustrate the benefi ts of understanding both motives and perceived constraints for tourism travel.

Cognitive relay networks employ cooperative relaying scheme in the cognitive secondary user transmission. In this letter, we theoretically derive a closed form expression and a lower bound of the outage performance for underlay cognitive relay networks considering the interference from the primary transmitter to the secondary receiver, the interference from the secondary transmitter to the primary receiver and the dependence introduced due to the interference power constraint. It is shown from simulation results that the derived closed form expression matches the simulated results.Index Terms-Cognitive relay, cochannel interference, outage probability (OP), underlay spectrum sharing.

Since the booming research on perovskite solar cells (PSCs), organic–inorganic hybrid halide perovskites have triggered widespread research attention. This is seen in the unprecedented improvement of the power conversion efficiency (PCE) from an initial 3.8% to a remarkable 25.5%. Despite the fascinating improvement in PCEs, the toxicity of the detrimental lead element is a major limiting factor that hampers the commercialization prospect of lead‐based materials. Extensive efforts have been dedicated to the progress of lead‐free, stable, and ecofriendly perovskite materials for green‐energy applications. Recently, double‐halide Cs2SnI6 perovskite emerged as a star material due to its favorable optoelectronic properties, stable nature, and environmental friendliness. Thus, an in‐time review to recapitulate the recent advances of Cs2SnI6 is critical to provide viable theoretical and experimental strategies for synergic optimization of perovskite films. Herein, the theoretical and experimental understandings of the properties of Cs2SnI6 are summarized and the different fabrication methodologies and their influences on the properties of Cs2SnI6 are discussed. The application potential of Cs2SnI6 is further reviewed and the limiting factors that influence the performance of Cs2SnI6 devices are highlighted. In the end, prospective research directions to improve the optoelectronic properties are presented for developing efficient Cs2SnI6 devices.

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