Quantum Dot as Absorbing Solar Cell Material

Abstract

Quantum dots as nano-materials have been extensively investigated in the past several decades from growth to characterization to applications. As the basis of future developments in the field this thesis collects a series of state-of-the-art chapters on the current status of quantum dot devices and how these devices take advantage of quantum features. The chapters cover numerous quantum dot applications in solar cells. Quantum Dot Devices is appropriate for researchers of all levels of experience with an interest in epitaxial and/or colloidal quantum dots. It provides the necessary overview of this exciting field. The third generation of solar cells includes those based on semiconductor quantum dots. This sophisticated technology applies nanotechnology and quantum mechanics theory to enhance the performance of ordinary solar cells. Although a practical application of quantum dot solar cells has yet to be achieved, a large number of theoretical calculations and experimental studies have confirmed the potential for meeting the requirement for ultra-high conversion. In this thesis, the methods used in and the results of various quantum dot solar cell designs were outlined, including quantum dot intermediate band solar cells, hot electron quantum dot solar cells, quantum-dot sensitized solar cells, colloidal quantum dot solar cells, hybrid polymer-quantum dot solar cells, and MEG quantum dot solar cells. Both theoretical and experimental approaches are described. Quantum Dot Solar Cells helps to connect the fundamental laws of physics and the chemistry of materials with advances in device design and performance. In this thesis discussed Kronig – Penney model using a specific software program. Experiment was conducted where the calculated band gap of germanium