Multicolor Nanostructured High Efficiency Photovoltaic Devices.

摘要

The goal of the project 'Multicolor Nanostructured High Efficiency Photovoltaic Devices,' is to experimentally demonstrate the fundamental physical mechanisms required for high performance photovoltaics, focusing on the conditions which maximize simultaneous radiative coupling between multiple energy levels. A material which has multiple quasi-Fermi levels is predicted to display a range of unique properties, including highly nonlinear absorption coefficients which depend on light intensity, absorption and emission properties which can be tuned by shining different wavelengths of light on the material, and the ability to alter the mobility of one type of carrier while leaving the other unaffected. While these properties allow a range on new devices, the focus of the material choices and theory is on ultra-high efficiency photovoltaics. Other potential new devices include efficient broad- band emitters, and lasers and photodetectors which are multicolor and switchable between the operating wavelengths.