Photoluminescence of two-dimensional GaTe and GaSe films

Gallium chalcogenides are promising building blocks for novel van der Waals heterostructures. We report on the low-temperature micro-photoluminescence (PL) of GaTe and GaSe films with thicknesses ranging from 200 nm to a single unit cell. In both materials, PL shows a dramatic decrease by 10e4–10e5 when film thickness is reduced from 200 to 10 nm. Based on evidence from continuous-wave (cw) and time-resolved PL, we propose a model explaining the PL decrease as a result of non-radiative carrier escape via surface states. Our results emphasize the need for special passivation of two-dimensional films for optoelectronic applications

Tax load to the economy of the Republic of Belarus

The article considers the tax burden on the economy of the Republic of Belarus. The resulted indicators of the tax burden on the economy and the rate of economic growth of the Republic of Belarus for 2014 -2016, as well as calculated specific weights of indirect taxes in percentage of GDP for 2014-2016. Proposals for measures to optimize the tax burden of the Republic of Belarus.В статье рассматривается налоговая нагрузка на экономику Республики Беларусь. Приведены показатели налоговой нагрузки на экономику и темпы экономического роста Республики Беларусь за 2014-2016 гг., а также рассчитан удельный вес косвенных налогов в процента к ВВП за 2014-2016 гг. Предложены мероприятия по оптимизации налоговой нагрузки Республики Беларусь