| Summary: | 碩士 === 國立交通大學 === 電子物理系所 === 103 === Solar cell plays an important role in energy conservation. However its energy conversion efficiency is not as satisfactory as expected. One of the methods to improve the efficiency is to use the semiconductor quantum dots (QDs), which can be controlled by their sizes to fit the requirement for absorbing photon with specific wavelength, to improve the poor response of solar cell in lower wavelength region and then enhance the solar cell efficiency. The excitons are confined because of the 3D confinement of QDs. However we found that the excitons can transfer the excitation energy by the dipole-dipole interaction instead of being trapped in QDs.
In this thesis, we use the envelope function approximation to calculate the dipole-dipole interaction between the exciton in QDs with different spin quantum numbers of electron and hole and connect to the k．p theory parameters. Next , start from Schrödinger equation, we establish the quantum master equation approach, using it to study on the dynamic analysis between the coupled QDs.
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