Abstract
This paper explores the application of transparent MoO x (x<;3) films as hole-collecting contacts on the rear side of crystalline silicon solar cells. Two dimensional simulations, which consider experimental contact recombinationJ 0c and resistivity ρ c values, indicate that the benefits of direct MoOx-based contacts are best exploited by reducing the rear contact fraction. This concept is demonstrated experimentally using simple p-type cells featuring a ~5% rear fraction MoO x contact. These cells attain a conversion efficiency of 20.4%, a promising result, given the early stage of development for this technology.