What is the highest efficiency PV?
First a quick definition. By efficiency in this context, one means what percentage of the solar energy (of all wavelengths) falling on a PV module is converted to electricity. There are several factors to keep in mind when considering this question. First there are many different kinds of PV devices. You will see breathless PR statements of the form ‘World record efficiency for such and such type solar cell.’ Eventually one begins to notice the ‘such and such type solar cell’ part.