This paper investigates the fully coupled piezoelectric models for determining strain fields, piezoelectric potentials, and
optical properties of wurtzite InGaN quantum dots (QDs). Through the calculations, we find that the semi-coupled
model clearly overestimates the piezoelectric potential, and the transition energy difference increased with increases in
the dot size and indium composition. Consequently, the semi-coupled model causes a great amount of distortion in
predicting the optical properties of InGaN QDs, compared to the fully coupled piezoelectric models.
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