Using Sagdeev’s pseudopotential technique, the e!ect of ion temperature and dust density
on the arbitrary amplitude dust ion acoustic solitary waves (DIASWs) in quantum
electron-ion (e-i) plasma is studied. The e!ect of ion temperature and dust density on the
region of existence, as well as on the shape of the solitary waves are investigated. It is also
shown that the quantum parameter H does not play any role in determining the region of
existence and on the amplitude of the large amplitude solitary wave. However, H has
signi!cant e!ect on the width of the solitary wave. It is worth noting that our results are in
agreement with previous investigations when the e!ect of ion temperature is neglected.