A DFT-LDA study of electronic and optical properties of hexagonal boron nitride under uniaxial strain

► Electronic and optical properties of h-BN under the uniaxial strain. ► AA stacking shows the indirect-direct transition at 6.55 GPa. ► Band-edge absorption threshold of AA, AD, AE and AF shows red shifts. ► Band-edge absorption threshold of AB red shifts initially and then blue shift.