Thermalvoltaic Cell and toalleviate Climate Change with reversible Emission

Abstract

Climate change, food scarce and energy crisis are some major problems we human are facing today, the development of the industry emitted excessive CO2 and it causes global warming effect since it is a gas with greenhouse effect. However, we need moderate CO2 emission to meet our demand to the energy for all individual and society activities that maintain our lives and realize our dreams. In fact, CO2 emission is reversible simply by afforesting and agricultural production, plant could just absorb CO2 and water as raw material for photosynthesis using sunlight as energy resource to produce carbohydrate which is the food for any creature on the earth. By accident, it was also found that heat could directly be converted into electricity by a thermal voltaic effect which just altered the non-equilibrium injection in a solar cell from photoemission into thermionic emission, or their combination, it could directly generate electromotive purely by absorbing heat from the environment with material that has thermionic emission under this temperature connected into the p-n junction of a photovoltaic cell, and graphene is promising since it may provide thermionic emission under room temperature more easily since it is a 2-dimensional semi-metal which has many novel properties such as massless electron and relativistic effect at low velocity and probably has no depletion effect with silicon. The CO2 emission could be reversed by more quality agricultural production and the excess heat in the environment could be directly absorbed to produce electricity by thermalvoltaic effect, in this way food scarce and energy crisis could resolve together with climate change, emission tax could be compensated by more production of vegetables and fruits or other vegetal growth.